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{{Short description|Telecommunication medium for transmitting and receiving moving images}}
{{About|the telecommunication medium|the appliance itself|Television set|other uses}}
{{Redirect|TV}}
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{{Use American English|date=July 2020}}
{{Use dmy dates|date=July 2022}}

[[File:Cptvdisplay.jpg|thumb|upright=1.35|[[Flat-panel display|Flat-screen]] television receivers on display for sale at a consumer electronics store in 2008]]

'''Television''' ('''TV''') is a [[telecommunications|telecommunication]] [[media (communication)|medium]] for [[transmitting]] moving images and sound. Additionally, the term can refer to a physical [[television set]] rather than the medium of [[signal transmission|transmission]]. Television is a [[mass media|mass medium]] for advertising, entertainment, news, and sports. The medium is capable of more than "[[radio broadcasting]]," which refers to an audio signal sent to [[radio receiver]]s.

Television became available in crude experimental forms in the 1920s, but only after several years of further development was the new technology marketed to consumers. After [[World War II]], an improved form of black-and-white television broadcasting became popular in the United Kingdom and the United States, and television sets became commonplace in homes, businesses, and institutions. During the 1950s, television was the primary medium for influencing [[public opinion]].<ref name="Diggs-Brown2011p53">Diggs-Brown, Barbara (2011) [https://books.google.com/books?id=7c0ycySng4YC&pg=PA53 ''Strategic Public Relations: Audience Focused Practice''] p. 48</ref> In the mid-1960s, color broadcasting was introduced in the U.S. and most other developed countries.

The availability of various types of archival storage media such as [[Betamax]] and [[VHS]] tapes, [[LaserDisc]]s, high-capacity [[hard disk drives]], [[Compact disc|CDs]], [[DVD]]s, [[flash drives]], high-definition [[HD DVD]]s and [[Blu-ray Disc]]s, and cloud [[digital video recorders]] has enabled viewers to watch pre-recorded material—such as movies—at home on their own time schedule. For many reasons, especially the convenience of remote retrieval, the storage of television and video programming now also occurs on [[Cloud computing|the cloud]] (such as the video-on-demand service by [[Netflix]]). At the beginning of the 2010s, [[digital television]] transmissions greatly increased in popularity. Another development was the move from [[standard-definition television]] (SDTV) ([[576i]], with 576 [[interlaced video|interlaced]] lines of resolution and [[480i]]) to [[high-definition television]] (HDTV), which provides a [[Image resolution|resolution]] that is substantially higher. HDTV may be transmitted in different formats: [[1080p]], [[1080i]] and [[720p]]. Since 2010, with the invention of [[smart television]], [[Internet television]] has increased the availability of television programs and movies via the Internet through [[streaming video]] services such as Netflix, [[Amazon Prime Video]], [[iPlayer]] and [[Hulu]].

In 2013, 79% of the world's [[households]] owned a television set.<ref>{{cite web|url=http://www.tvtechnology.com/opinions/0087/the-state-of-television-worldwide/222681|title=TVTechnology: The State of Television, Worldwide|access-date=22 March 2015|archive-date=28 April 2015|archive-url=https://web.archive.org/web/20150428042640/http://www.tvtechnology.com/opinions/0087/the-state-of-television-worldwide/222681|url-status=dead}}</ref> The replacement of earlier [[cathode-ray tube]] (CRT) screen displays with compact, energy-efficient, flat-panel alternative technologies such as [[Liquid-crystal display|LCDs]] (both [[Cold cathode#Lamps|fluorescent-backlit]] and [[LED-backlit LCD display|LED]]), [[OLED]] displays, and [[plasma display]]s was a hardware revolution that began with computer monitors in the late 1990s. Most television sets sold in the 2000s were flat-panel, mainly LEDs. Major manufacturers announced the discontinuation of CRT, [[Digital Light Processing]] (DLP), plasma, and even fluorescent-backlit LCDs by the mid-2010s.<ref name="cepro.com">{{cite web|url=http://www.cepro.com/article/mitsubishi_drops_dlp_displays_goodbye_rptvs_forever/|title=Mitsubishi Drops DLP Displays: Goodbye RPTVs Forever|author=Julie Jacobson|date=1 December 2012|access-date=22 March 2015|archive-date=26 March 2015|archive-url=https://web.archive.org/web/20150326171718/http://www.cepro.com/article/mitsubishi_drops_dlp_displays_goodbye_rptvs_forever|url-status=dead}}</ref><ref name="tomsguide.com">{{cite web|url=http://www.tomsguide.com/us/lg-end-plasma-tvs,news-19840.html|title=LG's Exit May Herald End of Plasma TVs|author=Marshall Honorof|work=Tom's Guide|date=28 October 2014|access-date=22 March 2015}}</ref> LEDs are being gradually replaced by OLEDs.<ref name="oled-info.com">{{cite web|url=http://www.oled-info.com/lg-electronics-expects-oled-tv-market-gradually-replace-led-tv-market|title=LG Electronics expects the OLED TV market to gradually replace the LED TV market|access-date=22 March 2015}}</ref> Also, major manufacturers have started increasingly producing smart TVs in the mid-2010s.<ref name="theverge.com">{{cite web|url=https://www.theverge.com/2015/1/5/7497383/sony-new-smart-tv-run-android-tv-ces-2015|title=All of Sony's new Smart TVs run on Android TV|work=The Verge|date=5 January 2015|access-date=22 March 2015}}</ref><ref name="techtimes.com">{{cite web|url=http://www.techtimes.com/articles/24117/20150103/ces-2015-new-samsung-smart-tvs-will-be-powered-by-tizen-os.htm|title=CES 2015: New Samsung Smart TVs Will Be Powered by Tizen OS|work=Tech Times|date=3 January 2015|access-date=22 March 2015}}</ref><ref name="cnet.com">{{cite web|url=https://www.cnet.com/news/lg-to-show-off-webos-2-0-smart-tv-at-ces-2015/|title=LG to show off webOS 2.0 smart TV at CES 2015|website=CNET|access-date=22 March 2015}}</ref> Smart TVs with integrated Internet and [[Web 2.0]] functions became the dominant form of television by the late 2010s.<ref name="Techcrunch.com">{{cite web|url=https://techcrunch.com/2010/10/24/internet-tv-and-the-death-of-cable-tv-really/ |title=Internet TV and The Death of Cable TV, really |publisher=Techcrunch.com |date=24 October 2010 |access-date=17 January 2012}}</ref>

Television signals were initially distributed only as terrestrial television using high-powered [[Radio frequency|radio-frequency]] [[television transmitter]]s to [[broadcasting|broadcast]] the signal to individual television receivers. Alternatively, television signals are distributed by [[Cable television|coaxial cable or optical fiber]], [[Satellite television|satellite]] systems, and, since the 2000s, via the Internet. Until the early 2000s, these were transmitted as [[analog television|analog]] signals, but a [[Digital television transition|transition]] to digital television was expected to be completed worldwide by the late 2010s. A standard television set consists of multiple internal [[electronic circuit]]s, including a [[Tuner (radio)|tuner]] for receiving and decoding broadcast signals. A visual [[display device]] that lacks a tuner is correctly called a [[video monitor]] rather than a television.

The television broadcasts are mainly a simplex broadcast meaning that the [[transmitter]] cannot receive and the receiver cannot transmit.

==Etymology==
The word ''television'' comes {{ety|grc|''τῆλε'' (tele)|far|lat|visio|sight}}. The first documented usage of the term dates back to 1900, when the Russian scientist [[Constantin Perskyi]] used it in a paper that he presented in French at the first International Congress of Electricity, which ran from 18 to 25 August 1900 during the [[Exposition Universelle (1900)|International World Fair]] in Paris.

The [[anglicized]] version of the term is first attested in 1907, when it was still "...a theoretical system to transmit moving images over [[telegraph]] or [[telephone wire]]s".<ref name="etymonline1">{{cite web|url=http://www.etymonline.com/index.php?term=television |title=Online Etymology Dictionary |publisher=Etymonline.com |date=30 December 1969 |access-date=30 April 2016}}</ref> It was "...formed in English or borrowed from French {{lang|fr|télévision}}."<ref name="etymonline1"/> In the 19th century and early 20th century, other "...proposals for the name of a then-hypothetical technology for sending pictures over distance were telephote (1880) and televista (1904)."<ref name="etymonline1"/>

The abbreviation ''TV'' is from 1948. The use of the term to mean "a [[television set]]" dates from 1941.<ref name="etymonline1"/> The use of the term to mean "television as a medium" dates from 1927.<ref name="etymonline1"/>

The term ''telly'' is more common in the UK. The slang term "the tube" or the "boob tube" derives from the bulky [[cathode-ray tube]] used on most TVs until the advent of [[flat-screen TV]]s. Another slang term for the TV is "idiot box."<ref>{{cite news|author=Thompson, Robert|title=1985: Television Transformed 1.0|work=[[The New York Times]]|date=3 October 2015|url=https://www.nytimes.com/2015/10/05/business/media/1985-television-transformed-1-0.html}}</ref>

==History==
{{main|History of television}}

===Mechanical===
{{main|Mechanical television}}
[[File:Nipkow disk.svg|right|upright=0.9|thumb|The [[Nipkow disk]]. This schematic shows the circular paths traced by the holes that may also be square for greater precision. The area of the disk outlined in black displays the region scanned.]]
[[Facsimile transmission]] systems for still photographs pioneered methods of mechanical scanning of images in the early 19th century. [[Alexander Bain (inventor)|Alexander Bain]] introduced the facsimile machine between 1843 and 1846. [[Frederick Bakewell]] demonstrated a working laboratory version in 1851.{{Citation needed|date=May 2015}} [[Willoughby Smith]] discovered the [[photoconductivity]] of the element [[selenium]] in 1873. As a 23-year-old German university student, [[Paul Gottlieb Nipkow|Paul Julius Gottlieb Nipkow]] proposed and patented the [[Nipkow disk]] in 1884 in [[Berlin]].<ref>Shiers, George and May (1997), ''Early Television: A Bibliographic Guide to 1940''. Taylor & Francis, pp. 13, 22. {{ISBN|978-0-8240-7782-2}}.</ref> This was a spinning disk with a spiral pattern of holes, so each hole scanned a line of the image. Although he never built a working model of the system, variations of Nipkow's spinning-disk "[[rasterizer|image rasterizer]]" became exceedingly common.<ref>Shiers & Shiers, p. 13, 22.</ref> [[Constantin Perskyi]] had coined the word ''television'' in a paper read to the International Electricity Congress at the [[Exposition Universelle (1900)|International World Fair]] in Paris on 24 August 1900. Perskyi's paper reviewed the existing electromechanical technologies, mentioning the work of Nipkow and others.<ref>{{cite web|author=Constantin PERSKYI|url=https://www.histv.net/perskyi-1900|title=Télévision au moyen de l'électricité|agency=Congrès Inographs by Telegraph|work=The New York Times Sunday Magazine|date=20 September 1907|page=7}}</ref> However, it was not until 1907 that developments in amplification tube technology by [[Lee de Forest]] and [[Arthur Korn]], among others, made the design practical.<ref name="Sending Photographs by Telegraph">[https://query.nytimes.com/gst/abstract.html?res=9A07E4DA1331E733A25757C2A9649C946697D6CF "Sending Photographs by Telegraph"], ''The New York Times'', Sunday Magazine, 20 September 1907, p. 7.</ref>

The first demonstration of the live transmission of images was by Georges Rignoux and A. Fournier in Paris in 1909. A matrix of 64 [[selenium]] cells, individually wired to a mechanical [[commutator (electric)|commutator]], served as an electronic [[retina]]. In the receiver, a type of [[Kerr effect|Kerr cell]] modulated the light, and a series of differently angled mirrors attached to the edge of a rotating disc scanned the modulated beam onto the display screen. A separate circuit regulated synchronization. The 8x8 [[pixel]] resolution in this proof-of-concept demonstration was just sufficient to clearly transmit individual letters of the alphabet. An updated image was transmitted "several times" each second.<ref>Henry de Varigny, "[http://histv2.free.fr/rignoux/rignoux1909.htm La vision à distance] {{Webarchive|url=https://web.archive.org/web/20160303231305/http://histv2.free.fr/rignoux/rignoux1909.htm |date=3 March 2016 }}", ''L'Illustration'', Paris, 11 December 1909, p. 451.</ref>

In 1911, [[Boris Rosing]] and his student [[Vladimir K. Zworykin|Vladimir Zworykin]] created a system that used a mechanical mirror-drum scanner to transmit, in Zworykin's words, "very crude images" over wires to the "[[Karl Ferdinand Braun|Braun]] tube" ([[cathode-ray tube]] or "CRT") in the receiver. Moving images were not possible because, in the scanner: "the sensitivity was not enough and the selenium cell was very laggy".<ref>[https://books.google.com/books?id=gZcwhVyiMqsC&q=zworykin+rosing+selenium R. W. Burns, ''Television: An International History of the Formative Years''], IET, 1998, p. 119. {{ISBN|0-85296-914-7}}.</ref>

In 1921, [[Édouard Belin]] sent the first image via radio waves with his [[belinograph]].<ref name="Corporation1921">{{cite magazine|url=https://books.google.com/books?id=aSoDAAAAMBAJ&pg=PA21|author=Wilfred S. Ogden|date=December 1921|publisher=Bonnier Corporation|pages=21–22|title=How the World's First Wireless News-Picture Was Flashed Across the Atlantic Ocean, Paris get President Harding's portrait in twenty minutes|magazine=The Popular Science Monthly|issn=0161-7370|access-date=2 July 2014}}</ref>

[[File:John Logie Baird and Stooky Bill.png|thumb|[[John Logie Baird|Baird]] in 1925 with his televisor equipment and dummies "James" and "Stooky Bill" ''(right)'']]

By the 1920s, when amplification made television practical, Scottish inventor [[John Logie Baird]] employed the Nipkow disk in his prototype video systems. On 25 March 1925, Baird gave the first public demonstration of televised [[silhouette]] images in motion at [[Selfridges]]'s department store in [[London]].<ref>{{cite journal |title=Current Topics and Events |journal=Nature |volume=115 |issue=2892 |pages=504–508 |year=1925 |bibcode=1925Natur.115..504. |doi=10.1038/115504a0 |doi-access=free|issn=0028-0836 }}</ref> Since human faces had inadequate contrast to show up on his primitive system, he televised a ventriloquist's dummy named "Stooky Bill," whose painted face had higher contrast, talking and moving. By 26 January 1926, he had demonstrated before members of the Royal Institution the transmission of an image of a face in motion by radio. This is widely regarded as the world's first true public television demonstration, exhibiting light, shade, and detail.<ref>Television 1873–1927,''Television: The Official Organ Of The Television Society'', Vo1, No1, March 1928, Television Press Ltd, London, p11.</ref> Baird's system used the Nipkow disk for both scanning the image and displaying it. A brightly illuminated subject was placed in front of a spinning Nipkow disk set with lenses that swept images across a static photocell. The thallium sulfide (Thalofide) cell, developed by [[Theodore Case]] in the U.S., detected the light reflected from the subject and converted it into a proportional electrical signal. This was transmitted by AM radio waves to a receiver unit, where the video signal was applied to a neon light behind a second Nipkow disk rotating synchronized with the first. The brightness of the neon lamp was varied in proportion to the brightness of each spot on the image. As each hole in the disk passed by, one [[scan line]] of the image was reproduced. Baird's disk had 30 holes, producing an image with only 30 scan lines, just enough to recognize a human face.<ref>"The 'Televisor' – Successful test of a new apparatus," The Times (London), 28 January 1926, p. 9. "First on a receiver in the same room and then on a portable receiver in another room, the visitors were shown recognizable reception of the movements of the dummy head and of a person speaking."</ref> In 1927, Baird transmitted a signal over {{convert|438|mi|km}} of telephone line between London and [[Glasgow]].<ref>{{cite web |title=John Logie Baird (1888–1946) |url=http://www.bbc.co.uk/history/historic_figures/baird_logie.shtml#:~:text=On%2026%20January%201926%20he,the%20Baird%20Television%20Development%20Company. |publisher=[[BBC]] |access-date=7 April 2021}}</ref> Baird's original 'televisor' now resides in the Science Museum, South Kensington.

In 1928, Baird's company (Baird Television Development Company/Cinema Television) broadcast the first transatlantic television signal between London and New York and the first shore-to-ship transmission. In 1929, he became involved in the first experimental mechanical television service in Germany. In November of the same year, Baird and [[Bernard Natan]] of [[Pathé]] established France's first television company, Télévision-[[John Logie Baird|Baird]]-Natan. In 1931, he made the first outdoor remote broadcast of [[Epsom Derby|The Derby]].<ref>Baird, J.L., "[http://www.bairdtelevision.com/1932.html Television in 1932]", ''BBC Annual Report'', 1933.</ref> In 1932, he demonstrated [[ultra-short wave]] television. Baird's mechanical system reached a peak of 240 lines of resolution on [[BBC]] telecasts in 1936, though the mechanical system did not scan the televised scene directly. Instead, a [[17.5 mm film]] was shot, rapidly developed, and then scanned while the film was still wet. {{Citation needed|date=August 2019}}

A U.S. inventor, [[Charles Francis Jenkins]], also pioneered the television. He published an article on "Motion Pictures by Wireless" in 1913, transmitted moving silhouette images for witnesses in December 1923, and on 13 June 1925, publicly demonstrated synchronized transmission of silhouette pictures. In 1925, Jenkins used the Nipkow disk and transmitted the silhouette image of a toy windmill in motion over a distance of 5 miles (8&nbsp;km), from a naval radio station in Maryland to his laboratory in Washington, D.C., using a lensed disk scanner with a 48-line resolution.<ref>"Radio Shows Far Away Objects in Motion", ''The New York Times'', 14 June 1925, p. 1.</ref><ref name="glinsky">{{cite book |last=Glinsky |first=Albert |title=Theremin: Ether Music and Espionage |url=https://archive.org/details/thereminethermus00glin |url-access=registration |publisher=University of Illinois Press |location=Urbana, IL |year=2000 |pages=[https://archive.org/details/thereminethermus00glin/page/41 41]–45 |isbn=978-0-252-02582-2}}</ref> He was granted [[United States Patent and Trademark Office|U.S. Patent]] No. 1,544,156 (Transmitting Pictures over Wireless) on 30 June 1925 (filed 13 March 1922).<ref>{{cite web |title=Case Files: Francis Jenkins (Phantoscope) |url=https://www.fi.edu/case-files/francis-jenkins-phantoscope |website=[[The Franklin Institute]] |date=27 May 2016 |access-date=28 March 2020 |archive-date=28 March 2020 |archive-url=https://web.archive.org/web/20200328180825/https://www.fi.edu/case-files/francis-jenkins-phantoscope |url-status=dead }}</ref>

[[Herbert E. Ives]] and [[Frank Gray (researcher)|Frank Gray]] of [[Bell Labs|Bell Telephone Laboratories]] gave a dramatic demonstration of mechanical television on 7 April 1927. Their reflected-light television system included both small and large viewing screens. The small receiver had a 2-inch-wide by 2.5-inch-high screen (5 by 6&nbsp;cm). The large receiver had a screen 24&nbsp;inches wide by 30&nbsp;inches high (60 by 75&nbsp;cm). Both sets could reproduce reasonably accurate, monochromatic, moving images. Along with the pictures, the sets received synchronized sound. The system transmitted images over two paths: first, a [[copper wire]] link from Washington to New York City, then a radio link from [[Whippany, New Jersey]]. Comparing the two transmission methods, viewers noted no difference in quality. Subjects of the telecast included [[Secretary of Commerce]] [[Herbert Hoover]]. A [[flying-spot scanner]] beam illuminated these subjects. The scanner that produced the beam had a 50-aperture disk. The disc revolved at a rate of 18 frames per second, capturing one frame about every 56 [[millisecond]]s. (Today's systems typically transmit 30 or 60 frames per second, or one frame every 33.3 or 16.7 milliseconds, respectively.) Television historian Albert Abramson underscored the significance of the Bell Labs demonstration: "It was, in fact, the best demonstration of a mechanical television system ever made to this time. It would be several years before any other system could even begin to compare with it in picture quality."<ref>Abramson, Albert, ''The History of Television, 1880 to 1941'', McFarland & Co., Inc., 1987, p. 101. {{ISBN|978-0-89950-284-7}}.</ref>

In 1928, [[WRGB]], then W2XB, was started as the world's first television station. It broadcast from the [[General Electric]] facility in [[Schenectady, NY]]. It was popularly known as "[[WGY (AM)|WGY]] Television." Meanwhile, in the [[Soviet Union]], [[Leon Theremin]] had been developing a mirror drum-based television, starting with 16 lines resolution in 1925, then 32 lines, and eventually 64 using [[interlaced video|interlacing]] in 1926. As part of his thesis, on 7 May 1926, he electrically transmitted and then projected near-simultaneous moving images on a {{convert|5|ft2|adj=on}} screen.<ref name="glinsky"/>

By 1927 Theremin had achieved an image of 100 lines, a resolution that was not surpassed until May 1932 by RCA, with 120 lines.<ref>{{cite web | url=http://www.earlytelevision.org/rca_story_brewster.html | title=Early Electronic Television RCA TV Development: 1929–1949 | publisher=Early Television Museum | access-date=20 February 2016 | author=Brewster, Richard}}</ref>

On 25 December 1926, [[Kenjiro Takayanagi]] demonstrated a television system with a 40-line resolution that employed a Nipkow disk scanner and CRT display at Hamamatsu Industrial High School in Japan. This prototype is still on display at the Takayanagi Memorial Museum in [[Shizuoka University]], Hamamatsu Campus. His research in creating a production model was halted by the [[Supreme Commander for the Allied Powers|SCAP]] after [[World War II]].<ref name="nhk.or.jp">[http://www.nhk.or.jp/strl/aboutstrl/evolution-of-tv-en/p05/ ''Kenjiro Takayanagi: The Father of Japanese Television''] {{webarchive|url=https://web.archive.org/web/20160101180643/http://www.nhk.or.jp/strl/aboutstrl/evolution-of-tv-en/p05/ |date=1 January 2016 }}, NHK (Japan Broadcasting Corporation), 2002. Retrieved 23 May 2009.</ref>

Because only a limited number of holes could be made in the disks, and disks beyond a certain diameter became impractical, image resolution on mechanical television broadcasts was relatively low, ranging from about 30 lines up to 120 or so. Nevertheless, the image quality of 30-line transmissions steadily improved with technical advances, and by 1933 the UK broadcasts using the Baird system were remarkably clear.<ref>{{cite book |last1=McLean |first1=Donald F. |title=Restoring Baird's Image |date=2000 |publisher=IET |isbn=978-0-85296-795-9 |page=184 |url=https://books.google.com/books?id=1ISFkhG6cZQC&pg=PA184 |language=en}}</ref> A few systems ranging into the 200-line region also went on the air. Two of these were the 180-line system that Compagnie des Compteurs (CDC) installed in Paris in 1935 and the 180-line system that [[Peck Television Corp.]] started in 1935 at station VE9AK in [[Montreal]].<ref>{{cite web|url=http://www.earlytelevision.org/ve9ak.html |title=VE9AK entry at |publisher=Earlytelevision.org |access-date=2 March 2010}}</ref><ref>{{cite web|title=Peck Television Corporation Console Receiver and Camera|url=http://www.earlytelevision.org/peck.html|publisher=Early Television Museum|access-date=18 February 2012}}</ref> The advancement of all-electronic television (including [[Video camera tube#Image dissector|image dissectors]] and other camera tubes and [[cathode-ray tube]]s for the reproducer) marked the start of the end for mechanical systems as the dominant form of television. Mechanical television, despite its inferior image quality and generally smaller picture, would remain the primary television technology until the 1930s. The last mechanical telecasts ended in 1939 at stations run by a lot of public universities in the United States.

===Electronic===
{{Further|Video camera tube}}
[[File:Ferdinand_Braun.jpg|thumb|upright=.8|[[Ferdinand Braun]]]]
In 1897, English [[physicist]] [[J. J. Thomson]] was able, in his three well-known experiments, to deflect cathode rays, a fundamental function of the modern [[cathode-ray tube]] (CRT). The earliest version of the CRT was invented by the German physicist [[Ferdinand Braun]] in 1897 and is also known as the "Braun" tube.<ref>Ferdinand Braun (1897) [https://archive.today/20141217172841/http://babel.hathitrust.org/cgi/pt?id=wu.89048352892;view=1up;seq=568 "Ueber ein Verfahren zur Demonstration und zum Studium des zeitlichen Verlaufs variabler Ströme"] (On a process for the display and study of the course in time of variable currents), ''Annalen der Physik und Chemie'', 3rd series, '''60''' : 552–59.</ref> It was a [[cold cathode|cold-cathode]] [[diode]], a modification of the [[Crookes tube]], with a [[phosphor]]-coated screen. Braun was the first to conceive the use of a CRT as a display device.<ref>{{cite book|last1=Lehrer |first1=Norman H. |title=Flat-Panel Displays and CRTS |chapter=The Challenge of the Cathode-Ray Tube|editor-first=Lawrence E. Jr. |editor-last=Tannas|doi=10.1007/978-94-011-7062-8_6|isbn=978-94-011-7062-8 |pages=138–76 |publisher=[[Van Nostrand Reinhold|Van Nostrand Reinhold Company Inc.]]|location=New York|date=1985}}</ref> The ''Braun tube'' became the foundation of 20th century television.<ref>{{Cite web|url=https://www.lindahall.org/about/news/scientist-of-the-day/karl-ferdinand-braun|title=Karl Ferdinand Braun|website=The Linda Hall Library}}</ref> In 1906 the Germans Max Dieckmann and Gustav Glage produced [[Raster scan|raster images]] for the first time in a CRT.<ref>{{cite web|url=http://www.televisionheaven.co.uk/television_timeline_1.htm|title=Television Timeline 1812–1923 – Television Heaven|first=Laurence|last=Marcus|access-date=11 November 2016|archive-date=17 October 2018|archive-url=https://web.archive.org/web/20181017014615/http://www.televisionheaven.co.uk/television_timeline_1.htm|url-status=dead}}</ref> In 1907, Russian scientist [[Boris Rosing]] used a CRT in the receiving end of an experimental [[video signal]] to form a picture. He managed to display simple geometric shapes onto the screen.<ref name="crthistory">{{cite web |url=http://inventors.about.com/od/cstartinventions/a/CathodeRayTube.htm |archive-url=https://archive.today/20120709164537/http://inventors.about.com/od/cstartinventions/a/CathodeRayTube.htm |url-status=dead |archive-date=9 July 2012 |title=History of the Cathode Ray Tube |access-date=4 October 2009 |work=About.com }}</ref>

In 1908, [[Alan Archibald Campbell-Swinton]], a fellow of the [[Royal Society]] (UK), published a letter in the scientific journal ''[[Nature (journal)|Nature]]'' in which he described how "distant electric vision" could be achieved by using a cathode-ray tube, or Braun tube, as both a transmitting and receiving device,<ref name="Swinton_DEV1">
{{cite journal
 | author = Campbell-Swinton, A. A.
 | title = Distant Electric Vision (first paragraph)
 | journal = Nature
 | volume = 78
 | issue = 2016
 | page = 151
 | date = 18 June 1908
| doi=10.1038/078151a0| bibcode = 1908Natur..78..151S
 | s2cid = 3956737
 | url = https://zenodo.org/record/1429503
 | doi-access = free
 }}
</ref><ref name="Swinton_DEV2">
{{cite journal
 | url = http://www.nature.com/nature/journal/v78/n2016/pdf/078151a0.pdf
 | author = Campbell-Swinton, A. A.
 | title = Distant Electric Vision
 | journal = Nature
 | volume = 78
 | page = 151
 | date = 18 June 1908
| issue=2016
| doi=10.1038/078151a0| bibcode = 1908Natur..78..151S
 | s2cid = 3956737
 | doi-access = free
 }}
</ref> he expanded on his vision in a speech given in London in 1911 and reported in ''[[The Times]]''<ref>"Distant Electric Vision", ''The Times'' (London), 15 November 1911, p. 24b.</ref> and the Journal of the Röntgen Society.<ref name="Swinton_Braid">
{{cite web
 | url = http://www.bairdtelevision.com/swinton.html
 | title = Alan Archivald Campbell-Swinton (1863–1930)
 | author = Bairdtelevision
 | work = Biography
 | access-date = 10 May 2010}}
</ref><ref name="Swinton-Rontgen">{{Cite book|url=https://books.google.com/books?id=OlXsZdT8HUQC&q=swinton+rontgen|title=Early Television: A Bibliographic Guide to 1940|first=May|last=Shiers|date=29 December 1997|page=56|publisher=Taylor & Francis|isbn=978-0-8240-7782-2 |via=Google Books}}</ref> In a letter to ''[[Nature (journal)|Nature]]'' published in October 1926, Campbell-Swinton also announced the results of some "not very successful experiments" he had conducted with G. M. Minchin and J. C. M. Stanton. They had attempted to generate an electrical signal by projecting an image onto a selenium-coated metal plate that was simultaneously scanned by a [[cathode ray]] beam.<ref name="Swinton_ET1">
{{cite journal
 | author = Campbell-Swinton, A. A.
 | title = Electric Television (abstract)
 | journal = Nature
 | volume = 118
 | issue = 2973
 | page = 590
 | date = 23 October 1926
| doi=10.1038/118590a0| bibcode = 1926Natur.118..590S
 | s2cid = 4081053
 | doi-access = free
 }}
</ref><ref name="Burns-Swinton">{{cite book
 | title = Television: An International History of the Formative Years
 | author = Burns, R W.
 | publisher = The Institute of Electrical Engineers (IEE) (History of Technology Series 22) in association with [ The Science Museum (UK)]
 | year = 1998
 | isbn = 978-0-85296-914-4
 | page = 123
 | url = https://books.google.com/books?id=gZcwhVyiMqsC&q=swinton+minchin+stanton+1903
 }}</ref> These experiments were conducted before March 1914, when Minchin died,<ref name="Minchin">
{{cite journal |author=G. |first=R. A. |date=2 April 1914 |title=Prof. G.M. Minchin, F.R.S |journal=[[Nature (journal)|Nature]] |volume=93 |issue=2318 |pages=115–16 |bibcode=1914Natur..93..115R |doi=10.1038/093115a0 |doi-access=free}}
</ref> but they were later repeated by two different teams in 1937, by H. Miller and J. W. Strange from [[EMI]],<ref name="Miller-Strange">
{{cite journal
 | doi = 10.1088/0959-5309/50/3/307
 |author1=Miller, H. |author2=Strange. J. W.
 |name-list-style=amp | title = The electrical reproduction of images by the photoconductive effect
 | journal = Proceedings of the Physical Society
 | volume = 50
 | issue = 3
 | pages = 374–84
 | date = 2 May 1938| bibcode = 1938PPS....50..374M
 }}
</ref> and by H. Iams and A. Rose from [[RCA]].<ref name="Iams-Rose-1937">
{{cite journal
 | doi = 10.1109/JRPROC.1937.228423
 |author1=Iams, H. |author2=Rose, A.
 |name-list-style=amp | title = Television Pickup Tubes with Cathode-Ray Beam Scanning
 | journal = Proceedings of the Institute of Radio Engineers
 | volume = 25
 | issue = 8
 | pages = 1048–70
 | date = August 1937|s2cid=51668505 }}
</ref> Both teams successfully transmitted "very faint" images with the original Campbell-Swinton's selenium-coated plate. Although others had experimented with using a cathode-ray tube as a receiver, the concept of using one as a transmitter was novel.<ref>Abramson, Albert, ''Zworykin, Pioneer of Television'', p. 16.</ref> The first cathode-ray tube to use a [[hot cathode]] was developed by [[John Bertrand Johnson|John B. Johnson]] (who gave his name to the term [[Johnson–Nyquist noise|Johnson noise]]) and Harry Weiner Weinhart of [[Western Electric]], and became a commercial product in 1922.{{citation needed|date=January 2011}}

In 1926, Hungarian engineer [[Kálmán Tihanyi]] designed a television system using fully electronic scanning and display elements and employing the principle of "charge storage" within the scanning (or "camera") tube.<ref>{{cite web | title = Hungary – Kálmán Tihanyi's 1926 Patent Application 'Radioskop' | work = Memory of the World | publisher = [[UNESCO|United Nations Educational, Scientific and Cultural Organization (UNESCO)]] | url = http://portal.unesco.org/ci/en/ev.php-URL_ID=23240&URL_DO=DO_TOPIC&URL_SECTION=201.html| access-date =22 February 2008}}</ref><ref name=US2133123>United States Patent Office, Patent No. 2,133,123, 11 October 1938.</ref><ref name=US2158259>United States Patent Office, Patent No. 2,158,259, 16 May 1939</ref><ref>{{cite web|url=http://www.bairdtelevision.com/zworykin.html |title=Vladimir Kosma Zworykin, 1889–1982 |publisher=Bairdtelevision.com |access-date=17 April 2009}}</ref> The problem of low sensitivity to light resulting in low electrical output from transmitting or "camera" tubes would be solved with the introduction of charge-storage technology by Kálmán Tihanyi beginning in 1924.<ref name="IEC_Tihanyi">[http://www.iec.ch/about/history/techline/swf/temp.xml] {{Webarchive|url=https://web.archive.org/web/20150924033236/http://www.iec.ch/about/history/techline/swf/temp.xml|date=24 September 2015}} "Kálmán Tihanyi (1897–1947)", ''IEC Techline'', International Electrotechnical Commission (IEC), 15 July 2009.</ref> His solution was a camera tube that accumulated and stored electrical charges ("photoelectrons") within the tube throughout each scanning cycle. The device was first described in a patent application he filed in [[Hungary]] in March 1926 for a television system he called "Radioskop".<ref name="Radioskop">[http://www.unesco.org/new/en/communication-and-information/flagship-project-activities/memory-of-the-world/register/full-list-of-registered-heritage/registered-heritage-page-4/kalman-tihanyis-1926-patent-application-radioskop/ "Kálmán Tihanyi's 1926 Patent Application 'Radioskop'"], ''Memory of the World'', United Nations Educational, Scientific and Cultural Organization ([[UNESCO]]), 2005. Retrieved 29 January 2009.</ref> After further refinements included in a 1928 patent application,<ref name="IEC_Tihanyi"/> Tihanyi's patent was declared void in Great Britain in 1930,<ref name="abstract1928">[http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_V3&FT=D&date=19301111&CC=GB&NR=313456A&KC=A Tihanyi, Koloman, ''Improvements in television apparatus'']. European Patent Office, Patent No. GB313456. Convention date UK application: 1928-06-11, declared void and published: 11 November 1930. Retrieved 25 April 2013.</ref> so he applied for patents in the United States. Although his breakthrough would be incorporated into the design of [[RCA]]'s "[[iconoscope]]" in 1931, the U.S. patent for Tihanyi's transmitting tube would not be granted until May 1939. The patent for his receiving tube had been granted the previous October. Both patents had been purchased by RCA prior to their approval.<ref name=autogenerated1>{{cite web|url=https://patents.google.com/patent/US2133123|title=Patent US2133123 – Television apparatus|access-date=22 March 2015}}</ref><ref name=autogenerated2>{{cite web|url=https://patents.google.com/patent/US2158259|title=Patent US2158259 – Television apparatus|access-date=22 March 2015}}</ref> Charge storage remains a basic principle in the design of imaging devices for television to the present day.<ref name="Radioskop"/> On 25 December 1926, at Hamamatsu Industrial High School in Japan, Japanese inventor [[Kenjiro Takayanagi]] demonstrated a TV system with a 40-line resolution that employed a CRT display.<ref name="nhk.or.jp"/> This was the first working example of a fully electronic television receiver and Takayanagi's team later made improvements to this system parallel to other television developments.<ref>{{Cite journal |date=June 1932 |title=The Editor—to You |journal=Radio News |volume=13 |issue=12 |pages=979}}</ref> Takayanagi did not apply for a patent.<ref>{{cite web|url=http://www.ieeeghn.org/wiki/index.php/Milestones:Development_of_Electronic_Television,_1924-1941|title=Milestones:Development of Electronic Television, 1924–1941|access-date=22 March 2015}}</ref>

In the 1930s, [[Allen B. DuMont]] made the first CRTs to last 1,000 hours of use, one of the factors that led to the widespread adoption of television.<ref>Hart, Hugh (28 January 2010). [https://www.wired.com/2010/01/jan-29-1901-dumont-will-make-tv-work-2/ "Jan. 29, 1901: DuMont Will Make TV Work."] ''[[Wired (magazine)|Wired]]''. Retrieved 21 May 2021.</ref>

On 7 September 1927, U.S. inventor [[Philo Farnsworth]]'s [[image dissector]] camera tube transmitted its first image, a simple straight line, at his laboratory at 202 Green Street in San Francisco.<ref name="Postman">[https://web.archive.org/web/20000531100005/http://www.time.com/time/time100/scientist/profile/farnsworth.html Postman, Neil, "Philo Farnsworth"], ''The TIME 100: Scientists & Thinkers'', ''Time'', 29 March 1999. Retrieved 28 July 2009.</ref><ref name="sfmuseum">[http://www.sfmuseum.org/hist10/philo.html "Philo Taylor Farnsworth (1906–1971)"] {{webarchive|url=https://web.archive.org/web/20110622033654/http://www.sfmuseum.org/hist10/philo.html |date=22 June 2011 }}, ''The Virtual Museum of the City of San Francisco''. Retrieved 15 July 2009.</ref> By 3 September 1928, Farnsworth had developed the system sufficiently to hold a demonstration for the press. This is widely regarded as the first electronic television demonstration.<ref name="sfmuseum"/> In 1929, the system was improved further by eliminating a motor generator so that his television system had no mechanical parts.<ref>Abramson, Albert, ''Zworykin, Pioneer of Television'', p. 226.</ref> That year, Farnsworth transmitted the first live human images with his system, including a three and a half-inch image of his wife Elma ("Pem") with her eyes closed (possibly due to the bright lighting required).<ref>{{cite web |url = http://db3-sql.staff.library.utah.edu/lucene/Manuscripts/null/Ms0648.xml/complete |title = The Philo T. and Elma G. Farnsworth Papers |archive-url=https://web.archive.org/web/20080422211543/http://db3-sql.staff.library.utah.edu/lucene/Manuscripts/null/Ms0648.xml/complete |archive-date=22 April 2008 |url-status=dead}}</ref>

[[File:Zworykin kinescope 1929.jpg|thumb|[[Vladimir Zworykin]] demonstrates electronic television (1929).]]
Meanwhile, Vladimir Zworykin also experimented with the cathode-ray tube to create and show images. While working for [[Westinghouse Electric (1886)|Westinghouse Electric]] in 1923, he began to develop an electronic camera tube. However, in a 1925 demonstration, the image was dim, had low contrast and poor definition, and was stationary.<ref>Abramson, Albert, ''Zworykin, Pioneer of Television'', University of Illinois Press, 1995, p. 51. {{ISBN|0-252-02104-5}}.</ref> Zworykin's imaging tube never got beyond the laboratory stage. However, RCA, which acquired the Westinghouse patent, asserted that the patent for Farnsworth's 1927 image dissector was written so broadly that it would exclude any other electronic imaging device. Thus, based on Zworykin's 1923 patent application, RCA filed a [[patent interference]] suit against Farnsworth. The [[United States Patent and Trademark Office|U.S. Patent Office]] examiner disagreed in a 1935 decision, finding priority of invention for Farnsworth against Zworykin. Farnsworth claimed that Zworykin's 1923 system could not produce an electrical image of the type to challenge his patent. Zworykin received a patent in 1928 for a color transmission version of his 1923 patent application;,<ref name=US1691324>[https://www.google.com/patents/about?id=mZ9KAAAAEBAJ Zworykin, Vladimir K., Television System] {{Webarchive|url=https://web.archive.org/web/20140131053220/http://www.google.com/patents/about?id=mZ9KAAAAEBAJ |date=31 January 2014 }}. Patent No. 1691324, U.S. Patent Office. Filed 1925-07-13, issued 13 November 1928. Retrieved 28 July 2009</ref> he also divided his original application in 1931.<ref name="US2022450">[https://www.google.com/patents?id=tQt-AAAAEBAJ Zworykin, Vladimir K., Television System] {{Webarchive|url=https://web.archive.org/web/20130518183522/http://www.google.com/patents?id=tQt-AAAAEBAJ |date=18 May 2013 }}. Patent No. 2022450, U.S. Patent Office. Filed 1923-12-29, issued 26 November 1935. Retrieved 10 May 2010.</ref> Zworykin was unable or unwilling to introduce evidence of a working model of his tube that was based on his 1923 patent application. In September 1939, after losing an appeal in the courts and being determined to go forward with the commercial manufacturing of television equipment, RCA agreed to pay Farnsworth US$1&nbsp;million over ten years, in addition to license payments, to use his patents.<ref>Stashower, Daniel, ''The Boy Genius and the Mogul: The Untold Story of Television'', Broadway Books, 2002, pp. 243–44. {{ISBN|978-0-7679-0759-0}}.</ref><ref name="Everson">Everson, George (1949), ''The Story of Television, The Life of Philo T. Farnsworth'' New York: W.W. Norton & Co,. {{ISBN|978-0-405-06042-7}}, 266 pp.</ref>

In 1933, RCA introduced an improved camera tube that relied on Tihanyi's charge storage principle.<ref name="NewYorkTimes">{{cite news |author=Lawrence, Williams L. |title=Human-like eye made by engineers to televise images|quote= 'Iconoscope' converts scenes into electrical energy for radio transmission. Fast as a movie camera. Three million tiny photocells 'memorize,' then pass out pictures. Step to home television. Developed in ten years of work by Dr. V.K. Zworykin, who describes it in Chicago. |url=https://books.google.com/books?id=OlXsZdT8HUQC&q=3971+zworykin+N.Y.T | work=The New York Times |date=27 June 1933 |access-date=10 January 2010 |isbn=978-0-8240-7782-2}}</ref> Called the "Iconoscope" by Zworykin, the new tube had a light sensitivity of about 75,000 [[lux]], and thus was claimed to be much more sensitive than Farnsworth's image dissector.{{Citation needed|date=July 2009}} However, Farnsworth had overcome his power issues with his Image Dissector through the invention of a completely unique "[[multipactor effect|Multipactor]]" device that he began work on in 1930, and demonstrated in 1931.<ref name="TheHistoryofTV1">Abramson, Albert (1987), ''The History of Television, 1880 to 1941''. Jefferson, NC: Albert Abramson. p. 148. {{ISBN|0-89950-284-9}}.</ref><ref name="Everson1">Everson, George (1949), ''The Story of Television, The Life of Philo T. Farnsworth'' New York: W.W. Norton & Co,. {{ISBN|978-0-405-06042-7}}, pp. 137–41.</ref> This small tube could amplify a signal reportedly to the 60th power or better<ref name="Everson2">Everson, George (1949), ''The Story of Television, The Life of Philo T. Farnsworth'' New York: W.W. Norton & Co,. {{ISBN|978-0-405-06042-7}}, p. 139.</ref> and showed great promise in all fields of electronics. Unfortunately, an issue with the multipactor was that it wore out at an unsatisfactory rate.<ref name="Everson3">Everson, George (1949), ''The Story of Television, The Life of Philo T. Farnsworth'' New York: W.W. Norton & Co,. {{ISBN|978-0-405-06042-7}}, p. 141.</ref>

[[File:Bundesarchiv Bild 183-K0917-501, Prof. Manfred v. Ardenne.jpg|thumb|right|[[Manfred von Ardenne]] in 1933]]
At the [[Berlin Radio Show]] in August 1931 in [[Berlin]], [[Manfred von Ardenne]] gave a public demonstration of a television system using a CRT for both transmission and reception, the first completely electronic television transmission.<ref>{{Cite web|url=https://www.vonardenne.biz/ja/company/history/manfred-von-ardenne/|title=Manfred von Ardenne|website=VON ARDENNE Website}}</ref> However, Ardenne had not developed a camera tube, using the CRT instead as a [[flying-spot scanner]] to scan slides and film.<ref>Albert Abramson, ''Zworykin: Pioneer of Television'', University of Illinois Press, 1995, p. 111.</ref> Ardenne achieved his first transmission of television pictures on 24 December 1933, followed by test runs for a public television service in 1934. The world's first electronically scanned television service then started in Berlin in 1935, the [[Fernsehsender Paul Nipkow]], culminating in the live broadcast of the [[1936 Summer Olympic Games]] from Berlin to public places all over Germany.<ref name="dw">{{cite web|title=22.3.1935: Erstes Fernsehprogramm der Welt|url=http://www.kalenderblatt.de/index.php?what=thmanu&lang=de&manu_id=1737&sdt=20090322&maca=de-podcast_kalenderblatt-1086-xml-mrss|publisher=[[Deutsche Welle]]|accessdate=27 July 2015}}</ref><ref name="computer">{{cite web|title=Es begann in der Fernsehstube: TV wird 80 Jahre alt|url=http://www.computerbild.de/artikel/avf-News-Fernseher-Es-begann-in-der-Fernsehstube-TV-wird-80-Jahre-alt-11525963.html|publisher=Computer Bild|date=22 March 2015|accessdate=28 April 2017|archive-date=21 January 2019|archive-url=https://web.archive.org/web/20190121012410/https://www.computerbild.de/artikel/avf-News-Fernseher-Es-begann-in-der-Fernsehstube-TV-wird-80-Jahre-alt-11525963.html|url-status=dead}}</ref>

Philo Farnsworth gave the world's first public demonstration of an all-electronic television system, using a live camera, at the [[Franklin Institute]] of [[Philadelphia]] on 25 August 1934 and for ten days afterward.<ref>"[https://books.google.com/books?id=yt8DAAAAMBAJ&pg=PA838 New Television System Uses 'Magnetic Lens']", ''Popular Mechanics'', Dec. 1934, pp. 838–39.</ref><ref name="Burns370">Burns, R.W. ''Television: An international history of the formative years''. (1998). IEE History of Technology Series, 22. London: IEE, p. 370. {{ISBN|9780852969144}}.</ref> Mexican inventor [[Guillermo González Camarena]] also played an important role in early television. His experiments with television (known as telectroescopía at first) began in 1931 and led to a patent for the "trichromatic field sequential system" [[color television]] in 1940.<ref>{{cite web|url=https://patents.google.com/patent/US2296019|title=Patent US2296019 – Chromoscopic adapter for television equipment|access-date=22 March 2015}}</ref> In Britain, the [[EMI]] engineering team led by [[Isaac Shoenberg]] applied in 1932 for a patent for a new device they called "the Emitron",<ref name="GB406353">
{{cite web
 |author1=EMI LTD |author2=Tedham, William F. |author3=McGee, James D. |name-list-style=amp | title = Improvements in or relating to cathode ray tubes and the like
 | url = http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_V3&FT=D&date=19340226&CC=GB&NR=406353A&KC=A
 | work = Patent No. GB 406,353 (filed May 1932, patented 1934)
 | publisher = United Kingdom Intellectual Property Office
 | access-date = 22 February 2010
}}</ref><ref name="US2077442">
{{cite web
 |author1=Tedham, William F. |author2=McGee, James D.
 |name-list-style=amp | title=Cathode Ray Tube
 | url=https://www.google.com/patents/about?id=BYNaAAAAEBAJ
 | archive-url=https://web.archive.org/web/20130523212804/http://www.google.com/patents/about?id=BYNaAAAAEBAJ
 | url-status=dead
 | archive-date=23 May 2013
 | work=Patent No. 2,077,422 (filed in Great Britain 1932, filed in USA 1933, patented 1937)
 | publisher=United States Patent Office
 | access-date=10 January 2010
}}</ref> which formed the heart of the cameras they designed for the BBC. On 2 November 1936, a [[405-line television system|405-line broadcasting]] service employing the Emitron began at studios in [[Alexandra Palace]] and transmitted from a specially built mast atop one of the Victorian building's towers. It alternated briefly with Baird's mechanical system in adjoining studios but was more reliable and visibly superior. This was the world's first regular "high-definition" television service.<ref name="Burns576">Burns, R.W., ''Television: An international history of the formative years''. (1998). IEE History of Technology Series, 22. London: IEE, p. 576. {{ISBN|0-85296-914-7}}.</ref>

The original U.S. iconoscope was noisy, had a high ratio of interference to signal, and ultimately gave disappointing results, especially compared to the high-definition mechanical scanning systems that became available.<ref name="Winstor-media">{{cite book
| title = Misunderstanding media
| author = Winston, Brian
| publisher = Harvard University Press
| year = 1986
| isbn = 978-0-674-57663-6
| pages = 60–61
| url = https://books.google.com/books?id=K_RpAAAAIAAJ&q=%22american+iconoscope%22+noisy
| access-date = 9 March 2010
}}</ref><ref name="Winstor-history">{{cite book
| title = Media technology and society. A history: from the telegraph to the Internet
| author = Winston, Brian
| publisher = Routledge
| year = 1998
| isbn = 978-0-415-14230-4
| page = 105
| url = https://books.google.com/books?id=TZOF_1GZRmYC&q=american+iconoscope+noisy
| access-date = 9 March 2010
}}</ref> The [[EMI]] team, under the supervision of [[Isaac Shoenberg]], analyzed how the iconoscope (or Emitron) produced an electronic signal and concluded that its real efficiency was only about 5% of the theoretical maximum.<ref name="Alexander">
{{cite book
| title=The inventor of stereo: the life and works of Alan Dower Blumlein
| author=Alexander, Robert Charles
| publisher=Focal Press
| year=2000
| isbn=978-0-240-51628-8
| pages=217–19
| url=https://books.google.com/books?id=qRhx3UmYBz0C&q=super+emitron
| access-date=10 January 2010
}}</ref><ref name="Burns-Blumlein">
{{cite book
| title=The life and times of A.D. Blumlein
| author=Burns, R.W.
| publisher=IET
| year=2000
| isbn=978-0-85296-773-7
| page=181
| url=https://books.google.com/books?id=B2z2ONO7nBQC&q=blumlein+mcgee+cps+emitron+decelerating+zero
| access-date=5 March 2010
}}</ref> They solved this problem by developing and patenting in 1934 two new camera tubes dubbed [[Video camera tube#Super-Emitron and image iconoscope|super-Emitron]] and [[Video camera tube#Orthicon and CPS Emitron|CPS Emitron]].<ref name="GB442666">
{{cite web
 |author1=Lubszynski, Hans Gerhard |author2=Rodda, Sydney
 |name-list-style=amp | title = Improvements in or relating to television
 | url = http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_V3&FT=D&date=19360212&CC=GB&NR=442666A&KC=A
 | work = Patent No. GB 442,666 (filed May 1934, patented 1936)
 | publisher = United Kingdom Intellectual Property Office
 | access-date = 15 January 2010
}}</ref><ref name="GB446661">
{{cite web
 |author1=Blumlein, Alan Dower |author2=McGee, James Dwyer
 |name-list-style=amp | title = Improvements in or relating to television transmitting systems
 | url = http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_V3&FT=D&date=19360504&CC=GB&NR=446661A&KC=A
 | work = Patent No. GB 446,661 (filed August 1934, patented 1936)
 | publisher = United Kingdom Intellectual Property Office
 | access-date = 9 March 2010
}}</ref><ref name="GB446664">
{{cite web
 | author = McGee, James Dwyer
 | title = Improvements in or relating to television transmitting systems
 | url = http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_V3&FT=D&date=19360505&CC=GB&NR=446664A&KC=A
 | work = Patent No. GB 446,664 (filed September 1934, patented 1936)
 | publisher = United Kingdom Intellectual Property Office
 | access-date = 9 March 2010
}}</ref> The super-Emitron was between ten and fifteen times more sensitive than the original Emitron and iconoscope tubes, and, in some cases, this ratio was considerably greater.<ref name="Alexander"/> It was used for [[outside broadcasting]] by the BBC, for the first time, on [[Armistice Day]] 1937, when the general public could watch on a television set as the King laid a wreath at the Cenotaph.<ref name="Alexander2">
{{cite book
| title=The inventor of stereo: the life and works of Alan Dower Blumlein
| author=Alexander, Robert Charles
| publisher=Focal Press
| year=2000
| isbn=978-0-240-51628-8
| page=216
| url=https://books.google.com/books?id=qRhx3UmYBz0C&q=emitron+cenotaph+armistice
| access-date=10 January 2010
}}</ref> This was the first time that anyone had broadcast a live street scene from cameras installed on the roof of neighboring buildings because neither Farnsworth nor RCA would do the same until the [[1939 New York World's Fair]].
[[File:1939 RCA Television Advertisement.jpg|left|thumb|Ad for the beginning of experimental television broadcasting in New York City by RCA in 1939]]
[[File:RCA Indian Head test pattern.JPG|thumb|right|[[Indian-head test pattern]] used during the black-and-white era before 1970. It was displayed when a television station first signed on every day.]]
On the other hand, in 1934, Zworykin shared some patent rights with the German licensee company Telefunken.<ref name="Inglis">{{cite book
 | title = Behind the tube: a history of broadcasting technology and business
 | author = Inglis, Andrew F.
 | publisher = Focal Press
 | year = 1990
 | isbn = 978-0-240-80043-1
 | page = 172
 | url = https://books.google.com/books?id=xiu4AAAAIAAJ&q=image-iconoscope+telefunken
 | access-date = 15 January 2010
}}</ref> The "image iconoscope" ("Superikonoskop" in Germany) was produced as a result of the collaboration. This tube is essentially identical to the super-Emitron.{{Citation needed|date=May 2010}} The production and commercialization of the super-Emitron and image iconoscope in Europe were not affected by the [[patent war]] between Zworykin and Farnsworth because Dieckmann and Hell had priority in Germany for the invention of the image dissector, having submitted a patent application for their ''Lichtelektrische Bildzerlegerröhre für Fernseher'' (''Photoelectric Image Dissector Tube for Television'') in Germany in 1925,<ref name="DE450187">
{{cite web
 |author1=Dieckmann, Max |author2=Rudolf Hell
 |name-list-style=amp | title = Lichtelektrische Bildzerlegerröehre für Fernseher
 | url = http://v3.espacenet.com/publicationDetails/originalDocument?CC=DE&NR=450187C&KC=C&FT=D&date=19271003&DB=EPODOC&locale=en_V3
 | work = Patent No. DE 450,187 (filed 1925, patented 1927)
 | publisher = Deutsches Reich Reichspatentamt
 | access-date = 28 July 2009
}}</ref> two years before Farnsworth did the same in the United States.<ref name="US1773980">
{{cite web
 | author = Farnsworth, Philo T.
 | title = Television System
 | url=https://www.google.com/patents/about?id=HRd5AAAAEBAJ
 | archive-url=https://web.archive.org/web/20130523192021/http://www.google.com/patents/about?id=HRd5AAAAEBAJ
 | url-status=dead
 | archive-date=23 May 2013
 | work = Patent No. 1,773,980 (filed 1927, patented 1930)
 | publisher = United States Patent Office
 | access-date = 28 July 2009
}}</ref> The image iconoscope (Superikonoskop) became the industrial standard for public broadcasting in Europe from 1936 until 1960, when it was replaced by the [[Video camera tube|vidicon]] and [[Video camera tube|plumbicon]] tubes. Indeed, it represented the European tradition in electronic tubes competing against the American tradition represented by the image orthicon.<ref name="Vries">{{cite book
 | title = Design methodology and relationships with science, Número 71 de NATO ASI series
 |author1=de Vries, M.J. |author2=de Vries, Marc |author3=Cross, Nigel |author4=Grant, Donald P. |name-list-style=amp | publisher = Springer
 | year = 1993
 | isbn = 978-0-7923-2191-0
 | page = 222
 | url = https://books.google.com/books?id=4T8U_J1h7noC&q=image-iconoscope+image-orthicon+telefunken
 | access-date = 15 January 2010
}}</ref><ref name="Multicon">
{{cite web
 | author = Smith, Harry
 | title = Multicon – A new TV camera tube
 | url = http://www.earlytelevision.org/multicon.html
 | archive-url = https://web.archive.org/web/20100318011743/http://www.earlytelevision.org/multicon.html
 | archive-date = 18 March 2010
| work = newspaper article
 | date = July 1953
 | publisher = Early Television Foundation and Museum
 | access-date = 15 January 2010
}}</ref> The German company Heimann produced the Superikonoskop for the 1936 Berlin Olympic Games,<ref name="Heimann1">
{{cite web
| author=Gittel, Joachim
| title=Spezialröhren
| url=http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Spezialroehren/Spezialroehren.htm
| work=photographic album
| date=11 October 2008
| publisher=Jogis Röhrenbude
| access-date=15 January 2010
}}</ref><ref name="ETM">
{{cite web
 | author = Early Television Museum
 | title = TV Camera Tubes, German "Super Iconoscope" (1936)
 | url = http://www.earlytelevision.org/prewar_camera_tubes.html
 | archive-url = https://web.archive.org/web/20110617080126/http://www.earlytelevision.org/prewar_camera_tubes.html
 | archive-date = 17 June 2011
| work = photographic album
 | publisher = Early Television Foundation and Museum
 | access-date = 15 January 2010
}}</ref> later Heimann also produced and commercialized it from 1940 to 1955;<ref name="Heimann2">
{{cite web
| author=Gittel, Joachim
| title=FAR-Röhren der Firma Heimann
| url=http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Spezialroehren/Ikonoskop_Heimann/Heimann.htm
| work=photographic album
| date=11 October 2008
| publisher=Jogis Röhrenbude
| access-date=15 January 2010
}}</ref> finally the Dutch company [[Philips]] produced and commercialized the image iconoscope and multicon from 1952 to 1958.<ref name="Multicon"/><ref name="Philips">
{{cite book
 | author = Philips
 | chapter = 5854, Image Iconoscope, Philips
 | url = http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Spezialroehren/Ikonoskop_Heimann/5854_Philips_Iconoscop-1958.pdf
 | title = electronic tube handbook
 | year = 1958
 | publisher = Philips
 | access-date = 15 January 2010
 | archive-url = https://web.archive.org/web/20060903223404/http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Spezialroehren/Ikonoskop_Heimann/5854_Philips_Iconoscop-1958.pdf
 | archive-date = 3 September 2006
 | url-status = live
}}</ref>

U.S. television broadcasting, at the time, consisted of a variety of markets in a wide range of sizes, each competing for programming and dominance with separate technology until deals were made and standards agreed upon in 1941.<ref name="Everson4">Everson, George (1949), ''The Story of Television, The Life of Philo T. Farnsworth'' New York: W.W. Norton & Co,. {{ISBN|978-0-405-06042-7}}, p. 248.</ref> RCA, for example, used only Iconoscopes in the New York area, but Farnsworth Image Dissectors in Philadelphia and San Francisco.<ref name="TheHistoryofTV2">Abramson, Albert (1987), ''The History of Television, 1880 to 1941''. Jefferson, NC: Albert Abramson. p. 254. {{ISBN|0-89950-284-9}}.</ref> In September 1939, RCA agreed to pay the Farnsworth Television and Radio Corporation royalties over the next ten years for access to Farnsworth's patents.<ref name="Schatzkin187-8">Schatzkin, Paul (2002), ''The Boy Who Invented Television''. Silver Spring, Maryland: Teamcom Books, pp. 187–88. {{ISBN|1-928791-30-1}}.</ref> With this historic agreement in place, RCA integrated much of what was best about the Farnsworth Technology into their systems.<ref name="TheHistoryofTV2"/> In 1941, the United States implemented 525-line television.<ref>"Go-Ahead Signal Due for Television", ''The New York Times'', 25 April 1941, p. 7.</ref><ref>"An Auspicious Beginning", ''The New York Times'', 3 August 1941, p. X10.</ref> Electrical engineer [[Benjamin Adler]] played a prominent role in the development of television.<ref>{{cite web|url=https://www.nytimes.com/1990/04/18/obituaries/benjamin-adler-86-an-early-advocate-of-uhf-television.html|title=Benjamin Adler, 86, An Early Advocate of UHF Television|date=18 April 1990|work=The New York Times}}</ref><ref>{{cite web|url=http://archive.poly.edu/poly_ebriefs/archives/Feb03.htm|title=ePoly Briefs Home|access-date=11 October 2016|archive-date=4 March 2016|archive-url=https://web.archive.org/web/20160304225948/http://archive.poly.edu/poly_ebriefs/archives/Feb03.htm|url-status=dead}}</ref>

The world's first 625-line television standard was designed in the Soviet Union in 1944 and became a national standard in 1946.<ref name="60TH_ANNIVERSARY_OF_625">[http://625.625-net.ru/files/587/511/h_665921be9883776271895912fb8bb262 "On the beginning of broadcast in 625 lines 60 years ago"], ''625'' magazine (in Russian). {{webarchive|url=https://web.archive.org/web/20160304131236/http://625.625-net.ru/files/587/511/h_665921be9883776271895912fb8bb262 |date=4 March 2016 }}</ref> The first broadcast in 625-line standard occurred in Moscow in 1948.<ref>[https://web.archive.org/web/20041230091501/http://www.ebu.ch/en/technical/trev/trev_255-portrait.pdf "M.I. Krivocheev – an engineer's engineer"], ''EBU Technical Review'', Spring 1993.</ref> The concept of 625 lines per frame was subsequently implemented in the European [[Comité consultatif international pour la radio|CCIR]] standard.<ref>{{cite web |url = http://cra.ir/FTD/Static/RRC/RRCFile10.pdf |title = "In the Vanguard of Television Broadcasting". |archive-url=https://web.archive.org/web/20070221210300/http://cra.ir/FTD/Static/RRC/RRCFile10.pdf |archive-date=21 February 2007 |url-status=dead}}</ref> In 1936, [[Kálmán Tihanyi]] described the principle of [[plasma display]], the first [[flat-panel display]] system.<ref>[https://ewh.ieee.org/r2/johnstown/downloads/20090217_IEEE_JST_Trivia_Answers.pdf]</ref><ref>[http://www.scitech.mtesz.hu/52tihanyi/flat-panel_tv_en.pdf] {{webarchive|url=https://web.archive.org/web/20120314070853/http://www.scitech.mtesz.hu/52tihanyi/flat-panel_tv_en.pdf|date=14 March 2012}}</ref>

Early electronic [[television sets]] were large and bulky, with [[analog circuits]] made of [[vacuum tubes]]. Following the invention of the first working [[transistor]] at [[Bell Labs]], [[Sony]] founder [[Masaru Ibuka]] predicted in 1952 that the transition to [[electronic circuits]] made of transistors would lead to smaller and more portable television sets.<ref>{{cite book |last1=Childs |first1=William R. |last2=Martin |first2=Scott B. |last3=Stitt-Gohdes |first3=Wanda |title=Business and Industry: Savings and investment options to telecommuting |date=2004 |publisher=[[Marshall Cavendish]] |isbn=9780761474395 |page=1217 |url=https://books.google.com/books?id=nCwYAAAAIAAJ |quote=In 1952 Ibuka toured AT&T's Bell Laboratories in the United States and saw the newly invented transistor. He realized that replacing the large, clumsy vacuum tube with the transistor would make possible smaller, more portable radios and TVs.}}</ref> The first fully transistorized, portable [[solid-state electronics|solid-state]] television set was the 8-inch [[Sony TV8-301]], developed in 1959 and released in 1960.<ref>{{cite journal |title=Sony Founder Masaru Ibuka's New Year's Dream Comes True: The Launch of Sony's TV Business |journal=Time Capsule |date=17 November 2009 |volume=21 |publisher=[[Sony]] |url=https://www.sony.net/SonyInfo/CorporateInfo/History/capsule/21/index.html |access-date=1 October 2019}}</ref><ref>{{cite book |last=Sparke |first=Penny |title=Japanese Design |date=2009 |publisher=[[The Museum of Modern Art]] |isbn=9780870707391 |page=18 |url=https://books.google.com/books?id=WaIQf2gV8pEC&pg=PA18}}</ref> This began the transformation of television viewership from a communal viewing experience to a solitary viewing experience.<ref>{{cite book |last=Lucie-Smith |first=Edward |author-link=Edward Lucie-Smith |title=A History of Industrial Design |date=1983 |publisher=[[Phaidon Press]] |isbn=9780714822815 |page=208 |url=https://books.google.com/books?id=fMsfAQAAIAAJ |quote=The first all-transistor television set was introduced by Sony in 1959 (fig. 386), only four years after their all-transistor radio, and started the transformation of television from something used for communal viewing, as the radio in the 30s had been a focus for communal listening, into an object of solitary contemplation.}}</ref> By 1960, Sony had sold over 4{{nbsp}}million portable television sets worldwide.<ref>{{cite book |last1=Chang |first1=Yoon Seok |last2=Makatsoris |first2=Harris C. |last3=Richards |first3=Howard D. |title=Evolution of Supply Chain Management: Symbiosis of Adaptive Value Networks and ICT |date=2007 |publisher=[[Springer Science & Business Media]] |isbn=9780306486968 |url=https://books.google.com/books?id=5Y3wBwAAQBAJ&pg=PA48}}</ref>
{{clear}}

===Color===
{{main|Color television}}
[[File:Samsung LED TV.jpg|thumb|right|Samsung LED TV]]
The basic idea of using three monochrome images to produce a color image had been experimented with almost as soon as black-and-white televisions had first been built. Although he gave no practical details, among the earliest published proposals for television was one by Maurice Le Blanc in 1880 for a color system, including the first mentions in television literature of line and frame scanning.<ref>M. Le Blanc, "Etude sur la transmission électrique des impressions lumineuses", ''La Lumière Electrique'', vol. 11, 1 December 1880, pp. 477–81.</ref> Polish inventor [[Jan Szczepanik]] patented a color television system in 1897, using a [[selenium]] photoelectric cell at the transmitter and an electromagnet controlling an oscillating mirror and a moving prism at the receiver. But his system contained no means of analyzing the spectrum of colors at the transmitting end and could not have worked as he described it.<ref>R.W. Burns, ''Television: An International History of the Formative Years'', IET, 1998, p. 98. {{ISBN|0-85296-914-7}}.</ref> Another inventor, [[Hovannes Adamian]], also experimented with color television as early as 1907. The first color television project is claimed by him,<ref>Western technology and Soviet economic development: 1945 to 1965, by Antony C. Sutton, Business & Economics – 1973, p. 330</ref> and was patented in Germany on 31 March 1908, patent No. 197183, then in Britain, on 1 April 1908, patent No. 7219,<ref>The History of Television, 1880–1941, by Albert Abramson, 1987, p. 27</ref> in France (patent No. 390326) and in Russia in 1910 (patent No. 17912).<ref name="tvmuseum.ru">{{Cite web|url=http://www.tvmuseum.ru/attach.asp?a_no=1018|archiveurl=https://web.archive.org/web/20130424162531/http://www.tvmuseum.ru/attach.asp?a_no=1018|url-status=dead|title=A. Rokhlin, Tak rozhdalos' dal'novidenie (in Russian)|archivedate=24 April 2013}}</ref>

Scottish inventor [[John Logie Baird]] demonstrated the world's first color transmission on 3 July 1928, using scanning discs at the transmitting and receiving ends with three spirals of apertures, each spiral with filters of a different primary color, and three light sources at the receiving end, with a [[commutator (electric)|commutator]] to alternate their illumination.<ref>John Logie Baird, [https://www.google.com/patents?id=JRVAAAAAEBAJ Television Apparatus and the Like] {{Webarchive|url=https://web.archive.org/web/20130518084511/http://www.google.com/patents?id=JRVAAAAAEBAJ |date=18 May 2013 }}, U.S. patent, filed in U.K. in 1928.</ref> Baird also made the world's first color broadcast on 4 February 1938, sending a mechanically scanned 120-line image from Baird's [[The Crystal Palace|Crystal Palace]] studios to a projection screen at London's [[Dominion Theatre]].<ref>Baird Television: [http://www.bairdtelevision.com/crystalpalace.html Crystal Palace Television Studios]. Previous color television demonstrations in the U.K. and U.S. had been via closed circuit.</ref> Mechanically scanned color television was also demonstrated by [[Bell Laboratories]] in June 1929 using three complete systems of [[Solar cell|photoelectric cells]], amplifiers, glow-tubes, and color filters, with a series of mirrors to superimpose the red, green, and blue images into one full-color image.

The first practical hybrid system was again pioneered by John Logie Baird. In 1940 he publicly demonstrated a color television combining a traditional black-and-white display with a rotating colored disk. This device was very "deep" but was later improved with a mirror folding the light path into an entirely practical device resembling a large conventional console.<ref>{{cite web|url=http://www.bairdtelevision.com/colour.html|title=The World's First High Definition Colour Television System|access-date=22 March 2015}}</ref> However, Baird was unhappy with the design, and, as early as 1944, had commented to a British government committee that a fully electronic device would be better.

In 1939, Hungarian engineer [[Peter Carl Goldmark]] introduced an electro-mechanical system while at [[CBS]], which contained an [[Iconoscope]] sensor. The CBS field-sequential color system was partly mechanical, with a disc made of red, blue, and green filters spinning inside the television camera at 1,200 rpm and a similar disc spinning in synchronization in front of the cathode-ray tube inside the receiver set.<ref>Peter C. Goldmark, assignor to Columbia Broadcasting System, "Color Television", [https://patents.google.com/patent/US2480571 U.S. Patent 2,480,571], filed 7 September 1940.</ref> The system was first demonstrated to the [[Federal Communications Commission]] (FCC) on 29 August 1940 and shown to the press on 4 September.<ref>Current Broadcasting 1940</ref><ref name=ColorTVSuccess>"Color Television Success in Test", ''The New York Times'', 30 August 1940, p. 21.</ref><ref>"Color Television Achieves Realism", ''The New York Times'', 5 September 1940, p. 18.</ref><ref>"[https://books.google.com/books?id=JScDAAAAMBAJ&pg=PA120 New Television System Transmits Images in Full Color]", ''Popular Science'', December 1940, p. 120.</ref>

CBS began experimental color field tests using film as early as 28 August 1940 and live cameras by 12 November.<ref name="ColorTVSuccess" /><ref>"CBS Demonstrates Full-Color Television," ''The Wall Street Journal'', 5 September 1940, p. 1. "Television Hearing Set," ''The New York Times'', 13 November 1940, p. 26.</ref> [[NBC]] (owned by RCA) made its first field test of color television on 20 February 1941. CBS began daily color field tests on 1 June 1941.<ref>Ed Reitan, [http://colortelevision.info/rca-nbc_firsts.html RCA-NBC Color Firsts in Television (commented)] {{Webarchive|url=https://web.archive.org/web/20150204092411/http://colortelevision.info/rca-nbc_firsts.html |date=4 February 2015 }}.</ref> These color systems were not compatible with existing black-and-white [[television sets]], and, as no color television sets were available to the public at this time, viewing of the color field tests was restricted to RCA and CBS engineers and the invited press. The [[War Production Board]] halted the manufacture of television and radio equipment for civilian use from 22 April 1942 to 20 August 1945, limiting any opportunity to introduce color television to the general public.<ref>"Making of Radios and Phonographs to End April 22", ''The New York Times'', 8 March 1942, p. 1. "Radio Production Curbs Cover All Combinations," ''The Wall Street Journal,'' 3 June 1942, p. 4. "WPB Cancels 210 Controls; Radios, Trucks in Full Output", ''New York Times'', 21 August 1945, p. 1.</ref><ref>Bob Cooper, "[http://www.earlytelevision.org/color_tv_cooper.html Television: The Technology That Changed Our Lives]", Early Television Foundation.</ref>

As early as 1940, Baird had started work on a fully electronic system he called [[Telechrome]]. Early Telechrome devices used two electron guns aimed at either side of a phosphor plate. The phosphor was patterned so the electrons from the guns only fell on one side of the patterning or the other. Using cyan and magenta phosphors, a reasonable limited-color image could be obtained. He also demonstrated the same system using monochrome signals to produce a 3D image (called "[[Stereoscopy|stereoscopic]]" at the time). A demonstration on 16 August 1944 was the first example of a practical color television system. Work on the Telechrome continued, and plans were made to introduce a three-gun version for full color. However, Baird's untimely death in 1946 ended the development of the Telechrome system.<ref>Albert Abramson, ''The History of Television, 1942 to 2000'', McFarland & Company, 2003, pp. 13–14. {{ISBN|0-7864-1220-8}}</ref><ref>Baird Television: [http://www.bairdtelevision.com/colour.html The World's First High Definition Colour Television System].</ref>
Similar concepts were common through the 1940s and 1950s, differing primarily in the way they re-combined the colors generated by the three guns. The [[Geer tube]] was similar to Baird's concept but used small pyramids with the phosphors deposited on their outside faces instead of Baird's 3D patterning on a flat surface. The [[Penetron]] used three layers of phosphor on top of each other and increased the power of the beam to reach the upper layers when drawing those colors. The [[Chromatron]] used a set of focusing wires to select the colored phosphors arranged in vertical stripes on the tube.

One of the great technical challenges of introducing color [[broadcast television]] was the desire to conserve [[bandwidth (signal processing)|bandwidth]], potentially three times that of the existing [[black-and-white]] standards, and not use an excessive amount of [[radio spectrum]]. In the United States, after considerable research, the [[NTSC|National Television Systems Committee]]<ref name=name>National Television System Committee (1951–1953), [Report and Reports of Panel No. 11, 11-A, 12–19, with Some supplementary references cited in the Reports, and the Petition for adoption of transmission standards for color television before the Federal Communications Commission, n.p., 1953], 17 v. illus., diagrams., tables. 28 cm. LC Control No.:54021386 [http://catalog.loc.gov/cgi-bin/Pwebrecon.cgi?DB=local&PAGE=First Library of Congress Online Catalog]</ref> approved an all-electronic system developed by [[RCA]], which encoded the color information separately from the brightness information and significantly reduced the resolution of the color information to conserve bandwidth. As black-and-white televisions could receive the same transmission and display it in black-and-white, the color system adopted is [backwards] "compatible." ("Compatible Color," featured in RCA advertisements of the period, is mentioned in the song "[[America (West Side Story song)|America]]," of [[West Side Story]], 1957.) The brightness image remained compatible with existing black-and-white television sets at slightly reduced resolution. In contrast, color televisions could decode the extra information in the signal and produce a limited-resolution color display. The higher-resolution black-and-white and lower-resolution color images combine in the brain to produce a seemingly high-resolution color image. The NTSC standard represented a significant technical achievement.

[[File:SMPTE Color Bars.svg|thumb|left|Color bars used in a [[test pattern]], sometimes used when no program material is available]]
The first color broadcast (the first episode of the live program ''[[The Marriage (American TV series)|The Marriage]]'') occurred on 8 July 1954. However, during the following ten years, most network broadcasts and nearly all local programming continued to be black-and-white. It was not until the mid-1960s that color sets started selling in large numbers, due in part to the color transition of 1965, in which it was announced that over half of all network prime-time programming would be broadcast in color that fall. The first all-color prime-time season came just one year later. In 1972, the last holdout among daytime network programs converted to color, resulting in the first completely all-color network season.

Early color sets were either floor-standing console models or tabletop versions nearly as bulky and heavy, so in practice they remained firmly anchored in one place. [[General Electric|GE]]'s relatively compact and lightweight [[Porta-Color]] set was introduced in the spring of 1966. It used a [[transistor]]-based [[UHF television broadcasting|UHF tuner]].<ref>{{cite web |title=GE Portacolor |url=http://www.earlytelevision.org/ge_portacolor.html |website=[[Early Television Museum]] |access-date=2 October 2019}}</ref> The first fully transistorized color television in the United States was the [[Quasar (brand)|Quasar]] television introduced in 1967.<ref>{{cite book |last1=Tyson |first1=Kirk |title=Competition in the 21st Century |date=1996 |publisher=[[CRC Press]] |isbn=9781574440324 |page=[https://archive.org/details/competitionin21s00tyso/page/253 253] |url=https://archive.org/details/competitionin21s00tyso|url-access=registration }}</ref> These developments made watching color television a more flexible and convenient proposition.

In 1972, sales of color sets finally surpassed sales of black-and-white sets. Color broadcasting in Europe was not standardized on the [[PAL]] format until the 1960s, and broadcasts did not start until 1967. By this point, many of the technical issues in the early sets had been worked out, and the spread of color sets in Europe was fairly rapid. By the mid-1970s, the only stations broadcasting in black-and-white were a few high-numbered UHF stations in small markets and a handful of low-power repeater stations in even smaller markets such as vacation spots. By 1979, even the last of these had converted to color. By the early 1980s, B&W sets had been pushed into niche markets, notably low-power uses, small portable sets, or for use as [[video monitor]] screens in lower-cost consumer equipment. By the late 1980s, even these last holdout niche B&W environments had inevitably shifted to color sets.

===Digital===
{{main|Digital television}}
{{see also|Digital television transition}}

Digital television (DTV) is the transmission of audio and video by digitally processed and multiplexed signals, in contrast to the analog and channel-separated signals used by [[analog television]]. Due to [[data compression]], digital television can support more than one program in the same channel bandwidth.<ref>{{cite web | url=http://www.disabled-world.com/artman/publish/digital-hdtv.shtml | title=HDTV Set Top Boxes and Digital TV Broadcast Information | access-date=28 June 2014 | url-status=dead | archive-url=http://arquivo.pt/wayback/20160522191336/http://www.disabled%2Dworld.com/artman/publish/digital%2Dhdtv.shtml | archive-date=22 May 2016 | df=dmy-all }}</ref> It is an innovative service that represents the most significant evolution in television broadcast technology since color television emerged in the 1950s.<ref>{{cite book |last1=Kruger |first1=Lennard G. |last2=Guerrero |first2=Peter F. |title=Digital Television: An Overview |date=2002 |publisher=[[Nova Publishers]] |isbn=9781590335024 |page=1 |url=https://books.google.com/books?id=BIAfWq2V3wgC&pg=PA1 |location=Hauppauge, New York}}</ref> Digital television's roots have been tied very closely to the availability of inexpensive, high performance [[computers]]. It was not until the 1990s that digital television became possible.<ref>{{cite web|url=http://www.benton.org/initiatives/obligations/charting_the_digital_broadcasting_future/sec1|title=The Origins and Future Prospects of Digital Television|date=22 December 2008|access-date=22 March 2015}}</ref> Digital television was previously not practically possible due to the impractically high [[Bandwidth (computing)|bandwidth]] requirements of [[uncompressed video|uncompressed]] [[digital video]],<ref name="Lea">{{cite book |last1=Lea |first1=William |title=Video on demand: Research Paper 94/68 |date=1994 |publisher=[[House of Commons Library]] |url=https://researchbriefings.parliament.uk/ResearchBriefing/Summary/RP94-68 |access-date=20 September 2019}}</ref><ref name="Barbero">{{cite journal |last1=Barbero |first1=M. |last2=Hofmann |first2=H. |last3=Wells |first3=N. D. |title=DCT source coding and current implementations for HDTV |journal=EBU Technical Review |date=14 November 1991 |issue=251 |pages=22–33 |publisher=[[European Broadcasting Union]] |url=https://tech.ebu.ch/publications/trev_251-barbero |access-date=4 November 2019}}</ref> requiring around 200{{nbsp}}[[Mbit/s]] for a [[standard-definition television]] (SDTV) signal,<ref name="Lea"/> and over 1{{nbsp}}[[Gbit/s]] for [[high-definition television]] (HDTV).<ref name="Barbero"/>

A digital television service was proposed in 1986 by [[Nippon Telegraph and Telephone]] (NTT) and the [[Ministry of Posts and Telecommunications (Japan)|Ministry of Posts and Telecommunication]] (MPT) in Japan, where there were plans to develop an "Integrated Network System" service. However, it was not possible to implement such a digital television service practically until the adoption of DCT video compression technology made it possible in the early 1990s.<ref name="Lea" />

In the mid-1980s, as Japanese [[consumer electronics]] firms forged ahead with the development of [[High-definition television|HDTV]] technology, the [[Multiple sub-Nyquist sampling encoding|MUSE]] analog format proposed by [[NHK]], a Japanese company, was seen as a pacesetter that threatened to eclipse U.S. electronics companies' technologies. Until June 1990, the Japanese MUSE standard, based on an analog system, was the front-runner among the more than 23 other technical concepts under consideration. Then, a U.S. company, General Instrument, demonstrated the possibility of a digital television signal. This breakthrough was of such significance that the [[Federal Communications Commission|FCC]] was persuaded to delay its decision on an ATV standard until a digitally-based standard could be developed.

In March 1990, when it became clear that a digital standard was possible, the FCC made several critical decisions. First, the Commission declared that the new ATV standard must be more than an enhanced analog signal but be able to provide a genuine HDTV signal with at least twice the resolution of existing television images. (7) Then, to ensure that viewers who did not wish to buy a new digital television set could continue to receive conventional television broadcasts, it dictated that the new ATV standard must be capable of being "[[simulcast]]" on different channels. (8) The new ATV standard also allowed the new DTV signal to be based on entirely new design principles. Although incompatible with the existing [[NTSC]] standard, the new DTV standard would be able to incorporate many improvements.

The last standards adopted by the FCC did not require a single standard for scanning formats, [[aspect ratios]], or lines of resolution. This compromise resulted from a dispute between the [[consumer electronics]] industry (joined by some broadcasters) and the [[computer industry]] (joined by the [[film industry]] and some public interest groups) over which of the two scanning processes—interlaced or progressive—would be best suited for the newer digital HDTV compatible display devices.<ref name="bambooav.com">{{cite web|url=http://www.bambooav.com/information-about-interlaced-and-progressive-scan-signals.html |archive-url=https://web.archive.org/web/20090816184950/http://www.bambooav.com/information-about-interlaced-and-progressive-scan-signals.html |url-status=dead |archive-date=16 August 2009 |title=Information about interlaced and progressive scan signals |access-date=22 March 2015 }}</ref> Interlaced scanning, which had been specifically designed for older analog CRT display technologies, scans even-numbered lines first, then odd-numbered ones. Interlaced scanning can be regarded as the first video compression model. It was partly developed in the 1940s to double the image resolution to exceed the limitations of television broadcast bandwidth. Another reason for its adoption was to limit the flickering on early CRT screens, whose phosphor-coated screens could only retain the image from the electron scanning gun for a relatively short duration.<ref>{{cite web|url=http://www.isfforum.com/FAQs/view/All-About-HDTV/What-s-the-Difference-between-Interlaced-and-Progressive-Video/33.html|title=What's the Difference between "Interlaced" and "Progressive" Video? – ISF Forum}}</ref> However, interlaced scanning does not work as efficiently on newer display devices such as [[Lcd|Liquid-crystal (LCD)]], for example, which are better suited to a more frequent progressive refresh rate.<ref name="bambooav.com"/>

[[Progressive scanning]], the format that the computer industry had long adopted for computer display monitors, scans every line in sequence, from top to bottom. Progressive scanning, in effect, doubles the amount of data generated for every full screen displayed in comparison to interlaced scanning by painting the screen in one pass in 1/60-second instead of two passes in 1/30-second. The computer industry argued that progressive scanning is superior because it does not "flicker" on the new standard of display devices in the manner of interlaced scanning. It also argued that progressive scanning enables easier connections with the Internet and is more cheaply converted to interlaced formats than vice versa. The film industry also supported progressive scanning because it offered a more efficient means of converting filmed programming into digital formats. For their part, the consumer [[electronics industry]] and broadcasters argued that interlaced scanning was the only technology that could transmit the highest quality pictures then (and currently) feasible, i.e., 1,080 lines per picture and 1,920 pixels per line. Broadcasters also favored interlaced scanning because their vast archive of interlaced programming is not readily compatible with a progressive format. [[William F. Schreiber]], who was director of the Advanced Television Research Program at the [[Massachusetts Institute of Technology]] from 1983 until his retirement in 1990, thought that the continued advocacy of interlaced equipment originated from consumer electronics companies that were trying to get back the substantial investments they made in the interlaced technology.<ref>{{cite web |url=http://www.cinemasource.com/articles/hist_politics_dtv.pdf|title=The history and politics of DTV|page=13|archive-url=https://web.archive.org/web/20030322131735/http://www.cinemasource.com/articles/hist_politics_dtv.pdf|archive-date=22 March 2003|url-status=live}}</ref>

[[Digital television transition]] started in late 2000s. All governments across the world set the deadline for analog shutdown by the 2010s. Initially, the adoption rate was low, as the first digital tuner-equipped television sets were costly. However, as the price of digital-capable television sets dropped, more and more households started converting to digital television sets. The transition is expected to be completed worldwide by the mid to late 2010s.

===Smart television===
{{main|Smart television}}
{{Distinguish|Internet television|Internet Protocol television|Web television}}
[[File:LG smart TV.jpg|thumb|right|upright=0.9|A smart TV]]
The advent of digital television allowed innovations like smart television sets. A smart television sometimes referred to as a "connected TV" or "hybrid TV," is a television set or [[set-top box]] with integrated Internet and [[Web 2.0]] features and is an example of [[technological convergence]] between computers, television sets, and set-top boxes. Besides the traditional functions of television sets and set-top boxes provided through traditional Broadcasting media, these devices can also provide Internet TV, online [[interactive media]], [[over-the-top content]], as well as [[video on demand|on-demand]] [[streaming media]], and [[home network]]ing access. These TVs come pre-loaded with an operating system.<ref name="Techcrunch.com"/><ref name="businessinsider1">{{cite web|author=Steve Kovach | url=http://www.businessinsider.com/what-is-a-smart-tv-2010-12 |title=What Is A Smart TV? |work=Business Insider |date=8 December 2010 |access-date=17 January 2012}}</ref><ref>{{cite news|author=Carmi Levy Special to the Star |url=https://www.thestar.com/business/media/article/876278--future-of-television-is-online-and-on-demand |title=Future of television is online and on-demand |work=Toronto Star |date=15 October 2010 |access-date=17 January 2012}}</ref><ref>{{cite web|first=Jeremy |last=Toeman |url=http://mashable.com/2010/10/20/connected-tv-content-not-apps/ |title=Why Connected TVs Will Be About the Content, Not the Apps |publisher=Mashable |date=20 October 2010 |access-date=7 October 2024}}</ref>

Smart TV is not to be confused with [[Internet TV]], [[Internet Protocol television]] (IPTV), or with [[Web TV]]. [[Internet television]] refers to receiving television content over the Internet instead of through traditional systems—terrestrial, cable, and satellite. IPTV is one of the emerging Internet television technology standards for television networks. [[Web television]] (WebTV) is a term used for programs created by a wide variety of companies and individuals for broadcast on Internet TV. A first patent was filed in 1994<ref>{{cite web|url=http://worldwide.espacenet.com/publicationDetails/originalDocument?FT=D&date=19960510&DB=EPODOC&locale=en_EP&CC=FR&NR=2726670A1&KC=A1&ND=3 |title=espacenet&nbsp;– Original document |publisher=Worldwide.espacenet.com |access-date=17 January 2012}}</ref> (and extended the following year)<ref>{{cite web|url=http://worldwide.espacenet.com/publicationDetails/biblio?CC=US&NR=5905521A&KC=A&FT=D&ND=7&date=19990518&DB=EPODOC |title=espacenet&nbsp;– Bibliographic data |publisher=Worldwide.espacenet.com |access-date=17 January 2012}}</ref> for an "intelligent" television system, linked with data processing systems, using a digital or analog network. Apart from being linked to data networks, one key point is its ability to automatically download necessary software routines according to a user's demand and process their needs. Major TV manufacturers announced the production of smart TVs only for middle-end and high-end TVs in 2015.<ref name="theverge.com"/><ref name="techtimes.com"/><ref name="cnet.com"/> Smart TVs have gotten more affordable compared to when they were first introduced, with 46 million U.S. households having at least one as of 2019.<ref>Kats, Rimma (15 November 2018). [https://www.emarketer.com/content/how-many-households-own-a-smart-tv "How Many Households Own a Smart TV?"] ''[[eMarketer]]''. Retrieved 21 May 2021.</ref>

===3D===
{{main|3D television}}
3D television conveys [[depth perception]] to the viewer by employing techniques such as [[stereoscopy|stereoscopic]] display, [[free viewpoint television|multi-view]] display, [[2D-plus-depth]], or any other form of [[3D display]]. Most modern 3D [[television set]]s use an [[active shutter 3D system]] or a [[polarized 3D system]], and some are [[Autostereoscopy|autostereoscopic]] without the need for glasses. Stereoscopic 3D television was demonstrated for the first time on 10 August 1928, by [[John Logie Baird]] in his company's premises at 133 Long Acre, London.<ref>{{cite web |url=http://www.bairdtelevision.com/stereo.html |title=How Stereoscopic Television is Shown |publisher=Baird Television website|access-date=18 September 2010| archive-url= https://web.archive.org/web/20101019045734/http://www.bairdtelevision.com/stereo.html| archive-date= 19 October 2010 | url-status=live}}</ref> Baird pioneered a variety of 3D television systems using electromechanical and cathode-ray tube techniques. The first 3D television was produced in 1935. The advent of digital television in the 2000s greatly improved 3D television sets. Although 3D television sets are quite popular for watching 3D home media, such as on Blu-ray discs, 3D programming has largely failed to make inroads with the public. As a result, many 3D television channels that started in the early 2010s were shut down by the mid-2010s. According to DisplaySearch 3D television shipments totaled 41.45&nbsp;million units in 2012, compared with 24.14 in 2011 and 2.26 in 2010.<ref>{{cite news|title=3D TV-sales growth |url=http://www.globalpost.com/dispatch/news/yonhap-news-agency/130318/3d-tv-sales-growth |newspaper=globalpost.com |date=18 March 2013 |url-status=dead |archive-url=https://web.archive.org/web/20130724082049/http://www.globalpost.com/dispatch/news/yonhap-news-agency/130318/3d-tv-sales-growth |archive-date=24 July 2013 }}</ref> As of late 2013, the number of 3D TV viewers started to decline.<ref>{{cite news|title=Future looks flat for 3D TV|url=https://www.smh.com.au/digital-life/digital-life-news/future-looks-flat-for-3d-tv-20130814-2rv1q.html|newspaper=The Sydney Morning Herald|date=15 August 2013}}</ref><ref>{{cite news|title=Is 3D TV dead? ESPN 3D to shut down by end of 2013|url=https://www.theverge.com/2013/6/12/4422874/espn-3d-to-shut-down-by-end-of-2013|author=Chris Welch|newspaper=The Verge|date=12 June 2013}}</ref><ref>{{cite news|title=Why 3D TV is such a turn-off|url=http://www.iol.co.za/scitech/technology/software/why-3d-tv-is-such-a-turn-off-1.1755980|publisher=Iol Scitech|author=Guy Walters|date=25 September 2014}}</ref><ref>{{cite news|title=Is 3D dead…again?|url=http://techday.com/netguide/news/is-3d-deadagain/192995/|publisher=Techday|author=Donovan Jackson|date=29 September 2014}}</ref><ref>{{cite news|title=3D TV falls further out of favour as Sky omits Premier League matches from schedule|url=https://www.telegraph.co.uk/culture/tvandradio/11102038/3D-TV-falls-further-out-of-favour-as-Sky-omits-Premier-League-matches-from-schedule.html |archive-url=https://ghostarchive.org/archive/20220110/https://www.telegraph.co.uk/culture/tvandradio/11102038/3D-TV-falls-further-out-of-favour-as-Sky-omits-Premier-League-matches-from-schedule.html |archive-date=10 January 2022 |url-access=subscription |url-status=live|work=The Telegraph|author=Hannah Furness|date=17 September 2014}}{{cbignore}}</ref>

==Broadcast systems==
===Terrestrial television===
{{main|Terrestrial television}}
{{see also|Timeline of the introduction of television in countries}}

[[File:UHF TV Antenna 001.JPG|thumb|upright=1.35|A modern high gain UHF Yagi [[television antenna]]. It has 17 directors and one reflector (made of 4 rods) shaped as a [[corner reflector antenna|corner reflector]].]]
Programming is [[Broadcasting|broadcast]] by television stations, sometimes called "channels," as stations are [[Frequency allocation|licensed]] by their governments to broadcast only over assigned [[Channel (broadcasting)|channels]] in the television [[band (radio)|band]]. At first, [[Terrestrial television|terrestrial broadcasting]] was the only way television could be widely distributed, and because [[Bandwidth (signal processing)|bandwidth]] was limited, i.e., there were only a small number of [[Television channel|channels]] available, government regulation was the norm. In the U.S., the [[Federal Communications Commission]] (FCC) allowed stations to broadcast advertisements beginning in July 1941 but required public service programming commitments as a requirement for a license. By contrast, the United Kingdom chose a different route, imposing a [[television license]] fee on owners of television reception equipment to fund the [[British Broadcasting Corporation]] (BBC), which had public service as part of its [[Royal Charter]].

[[WRGB]] claims to be the world's oldest television station, tracing its roots to an experimental station founded on 13 January 1928, broadcasting from the [[General Electric]] factory in [[Schenectady, NY]], under the call letters '''W2XB'''.<ref>{{cite web| url = https://books.google.com/books?id=iuIDAAAAMBAJ&dq=Popular+Science+1930+plane+%22Popular+Mechanics%22&pg=PA177| title = "The First Television Show" ''Popular Mechanics'', August 1930, pp. 177–79| date = August 1930| publisher = Hearst Magazines}}</ref> It was popularly known as "WGY Television" after its sister radio station. Later, in 1928, General Electric started a second facility, this one in New York City, which had the call letters [[W2XBS]] and which today is known as [[WNBC]]. The two stations were experimental and had no regular programming, as receivers were operated by engineers within the company. The image of a [[Felix the Cat]] doll rotating on a turntable was broadcast for 2 hours every day for several years as engineers tested new technology. On 2 November 1936, the [[BBC]] began transmitting the world's first public regular high-definition service from the Victorian [[Alexandra Palace]] in north London.<ref>{{cite web|url=http://www.teletronic.co.uk/tvera.htm|title=The History of the BBC: The First TV Era|author=Laurence Marcus|access-date=22 March 2015|archive-date=13 August 2011|archive-url=https://web.archive.org/web/20110813233820/http://www.teletronic.co.uk/tvera.htm|url-status=dead}}</ref> It therefore claims to be the birthplace of television broadcasting as we now know it.

With the widespread adoption of cable across the United States in the 1970s and 1980s, terrestrial television broadcasts have been in decline; in 2013 it was estimated that about 7% of US households used an antenna.<ref>[http://www.tvtechnology.com/article/cea-study-says-seven-percent-of-tv-households-use-antennas-/220585 "CEA Study Says Seven Percent of TV Households Use Antennas"], ''TVTechnology'', 30 July 2013 {{webarchive|url=https://web.archive.org/web/20141217104116/http://www.tvtechnology.com/article/cea-study-says-seven-percent-of-tv-households-use-antennas-/220585 |date=17 December 2014 }}</ref><ref>[http://www.tvtechnology.com/article/nielsen-broadcast-reliance-grew-in--/217217 "Nielsen: Broadcast Reliance Grew in 2012"], ''TVTechnology'', 14 January 2013 {{webarchive|url=https://web.archive.org/web/20141218160139/http://www.tvtechnology.com/article/nielsen-broadcast-reliance-grew-in--/217217 |date=18 December 2014 }}</ref> A slight increase in use began around 2010 due to switchover to [[digital terrestrial television]] broadcasts, which offered pristine image quality over very large areas, and offered an alternative to cable television (CATV) for [[cord cutters]]. All other countries around the world are also in the process of either shutting down analog terrestrial television or switching over to digital terrestrial television.

===Cable television===
{{main|Cable television}} {{see also|Cable television by region}}
[[File:F-Stecker und Kabel.jpg|thumb|left|[[Coaxial cable]] is used to carry cable television signals into cathode-ray tube and flat-panel television sets.]]
Cable television is a system of broadcasting television programming to paying subscribers via radio frequency (RF) signals transmitted through coaxial cables or light pulses through [[fiber-optic]] cables. This contrasts with traditional terrestrial television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television. In the 2000s, FM radio programming, high-speed Internet, telephone service, and similar non-television services may also be provided through these cables. The abbreviation CATV is sometimes used for cable television in the United States. It originally stood for Community Access Television or Community Antenna Television, from cable television's origins in 1948: in areas where over-the-air reception was limited by distance from transmitters or mountainous terrain, large "community antennas" were constructed, and cable was run from them to individual homes.<ref>{{cite web | url=http://www.calcable.org/learn/history-of-cable/ | title=History of Cable | publisher=California Cable and Telecommunications Association | access-date=20 February 2016}}</ref>

===Satellite television===
{{main|Satellite television}}

[[File:Dishing out the truth.JPG|upright=1.15|thumb|right|DBS satellite dishes installed on an apartment complex]]
Satellite television is a system of supplying [[television programming]] using broadcast signals relayed from [[communication satellite]]s. The signals are received via an outdoor parabolic reflector antenna, usually referred to as a [[satellite dish]] and a [[low-noise block downconverter]] (LNB). A satellite receiver then decodes the desired television program for viewing on a [[television set]]. Receivers can be external [[set-top box]]es, or a built-in [[television tuner]]. Satellite television provides a wide range of channels and services, especially to geographic areas without terrestrial television or cable television.

The most common method of reception is [[direct-broadcast satellite television]] (DBSTV), also known as "direct to home" (DTH).<ref name="tr101198">{{Cite report|author=Antipolis, Sophia|date=September 1997|title=Digital Video Broadcasting (DVB); Implementation of Binary Phase Shift Keying (BPSK) modulation in DVB satellite transmission systems|url=http://www.etsi.org/deliver/etsi_tr/101100_101199/101198/01.01.01_60/tr_101198v010101p.pdf|publisher=[[European Telecommunications Standards Institute]]|pages=1–7|docket=TR 101 198|access-date=20 July 2014|archive-url=https://web.archive.org/web/20120302190812/http://www.etsi.org/deliver/etsi_tr/101100_101199/101198/01.01.01_60/tr_101198v010101p.pdf|archive-date=2 March 2012|url-status=live}}</ref> In DBSTV systems, signals are relayed from a [[direct broadcast satellite]] on the [[Ku band|K<sub>u</sub>]] wavelength and are completely digital.<ref name=m101>{{cite journal|title=Frequency letter bands|url=http://www.microwaves101.com/encyclopedia/letterbands.cfm|website=Microwaves101.com|date=25 April 2008|access-date=25 December 2014|archive-date=14 July 2014|archive-url=https://web.archive.org/web/20140714171156/http://www.microwaves101.com/ENCYCLOPEDIA/letterbands.cfm|url-status=dead}}</ref> Satellite TV systems formerly used systems known as [[television receive-only]]. These systems received analog signals transmitted in the [[C band (IEEE)|C-band]] spectrum from [[Fixed Service Satellite|FSS]] type satellites and required the use of large dishes. Consequently, these systems were nicknamed "big dish" systems and were more expensive and less popular.<ref name=fcc>{{cite web|title=Installing Consumer-Owned Antennas and Satellite Dishes|url=http://www.fcc.gov/cgb/consumerfacts/consumerdish.html|publisher=FCC|access-date=21 November 2008}}</ref>

The direct-broadcast satellite television signals were earlier analog signals and later digital signals, both of which require a compatible receiver. [[Digital signal (broadcasting)|Digital signals]] may include [[high-definition television]] (HDTV). Some transmissions and channels are [[free-to-air]] or [[free-to-view]], while many other channels are [[pay television]] requiring a subscription.<ref>{{cite book |last1=Campbell|first1=Dennis|last2=Cotter|first2=Susan|year=1998|title=Copyright Infringement|url=https://books.google.com/books?id=kRJCwqzE3iwC&pg=PA161|publisher=Kluwer Law International|isbn=978-90-247-3002-5|access-date=18 September 2014}}</ref>
In 1945, British science fiction writer [[Arthur C. Clarke]] proposed a worldwide communications system that would function by means of three satellites equally spaced apart in Earth orbit.<ref>{{cite web |url=http://www.clarkefoundation.org/archives/1996.php |archive-url=https://web.archive.org/web/20110716135721/http://www.clarkefoundation.org/archives/1996.php |archive-date=16 July 2011 |title=The Arthur C. Clarke Foundation |url-status=dead |access-date=1 June 2016}}</ref><ref>{{cite book|last1=Campbell|first1=Richard|last2=Martin|first2=Christopher R.|last3=Fabos|first3=Bettina|date=23 February 2011|title=Media and Culture: An Introduction to Mass Communication|url=https://books.google.com/books?id=WuqjReIZ4TcC&pg=PA152|location=London, UK|publisher=[[Macmillan Publishers]]|page=152|isbn=978-1-4576-2831-3|access-date=15 August 2014}}</ref> This was published in the October 1945 issue of the ''[[Wireless World]]'' magazine and won him the [[Franklin Institute]]'s [[Stuart Ballantine Medal]] in 1963.<ref>{{cite web|url=http://lakdiva.org/clarke/1945ww|title=The 1945 Proposal by Arthur C. Clarke for Geostationary Satellite Communications|access-date=22 March 2015}}</ref><ref>{{cite book|date=September 1995|title=Wireless technologies and the national information infrastructure.|url=https://books.google.com/books?id=S2f8q2c0R5cC&pg=PA138|publisher=DIANE Publishing|page=138|isbn=978-0-16-048180-2|access-date=15 August 2014}}</ref>

The first satellite television signals from Europe to North America were relayed via the [[Telstar]] satellite over the [[Atlantic Ocean]] on 23 July 1962.<ref name="histchannel">{{cite web |url=http://www.history.com/news/the-birth-of-satellite-tv-50-years-ago|title=The Birth of Satellite TV, 50 Years Ago|last1=Klein|first1=Christopher|date=23 July 2012|website=History.com|publisher=History Channel|access-date=5 June 2014}}</ref> The signals were received and broadcast in North American and European countries and watched by over 100 million.<ref name="histchannel"/> Launched in 1962, the ''[[Relay program|Relay 1]]'' satellite was the first satellite to transmit television signals from the US to Japan.<ref name="relay1">{{cite web |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1962-068A|title=Relay 1|website=NASA.gov|publisher=NASA}}</ref> The first [[geosynchronous]] [[communication satellite]], [[Syncom 2]], was launched on 26 July 1963.<ref>{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1963-031A|title=Syncom 2|last1=Darcey|first1=RJ|date=16 August 2013|website=NASA.gov|publisher=NASA|access-date=5 June 2014}}</ref>

The world's first commercial communications satellite, called [[Intelsat I]] and nicknamed "Early Bird", was launched into geosynchronous orbit on 6 April 1965.<ref>{{cite web|url=http://www.astronautix.com/craft/intlsat1.htm|title=Encyclopedia Astronautica – Intelsat I|access-date=5 April 2010|url-status=dead|archive-url=https://web.archive.org/web/20100116224556/http://astronautix.com/craft/intlsat1.htm|archive-date=16 January 2010}}</ref> The first national network of television satellites, called [[Orbita (TV system)|Orbita]], was created by the [[Soviet Union]] in October 1967, and was based on the principle of using the highly elliptical [[Molniya (satellite)|Molniya]] satellite for rebroadcasting and delivering of television signals to ground [[downlink]] stations.<ref>{{cite press release|author=<!--Staff writer(s); no by-line.-->|title=Soviet-bloc Research in Geophysics, Astronomy, and Space|url=https://books.google.com/books?id=pyRx2ssMQ6MC|location=Springfield Virginia|publisher=U.S. Joint Publications Research Service|page=60|year=1970|issue=221–230|access-date=16 December 2014}}</ref> The first commercial North American satellite to carry television transmissions was Canada's geostationary [[Anik 1]], which was launched on 9 November 1972.<ref>{{cite news|last=Robertson|first=Lloyd|title=Anik A1 launching: bridging the gap | publisher = CBC English TV | date = 9 November 1972 | url = http://archives.cbc.ca/500f.asp?id=1-75-92-594 | access-date = 25 January 2007 }}</ref> [[ATS-6]], the world's first experimental educational and [[Direct Broadcast Satellite]] (DBS), was launched on 30 May 1974.<ref name="ats">{{cite web|url=http://www.nasa.gov/centers/goddard/missions/ats_prt.htm|title=NASA – ATS|last1=Ezell|first1=Linda N.|date=22 January 2010|website=Nasa.gov|publisher=[[NASA]]|access-date=1 July 2014|archive-date=6 April 2013|archive-url=https://web.archive.org/web/20130406164505/http://www.nasa.gov/centers/goddard/missions/ats_prt.htm|url-status=dead}}</ref> It transmitted at 860&nbsp;MHz using wideband FM modulation and had two sound channels. The transmissions were focused on the Indian subcontinent, but experimenters were able to receive the signal in Western Europe using home-constructed equipment that drew on UHF television design techniques already in use.<ref name="tvdx">Long Distance Television Reception (TV-DX) For the Enthusiast, Roger W. Bunney, {{ISBN|0-900162-71-6}}</ref>

The first in a series of Soviet geostationary satellites to carry [[Direct-To-Home]] television, [[Ekran]] 1, was launched on 26 October 1976.<ref>{{cite web|url=http://www.astronautix.com/craft/ekran.htm|title=Ekran|year=2007|website=Astronautix.com|publisher=Astronautix|access-date=1 July 2014|url-status=dead|archive-url=https://web.archive.org/web/20131112153322/http://www.astronautix.com/craft/ekran.htm|archive-date=12 November 2013}}</ref> It used a 714&nbsp;MHz UHF downlink frequency so that the transmissions could be received with existing [[UHF television broadcasting|UHF television technology]] rather than microwave technology.<ref name="Ekran">{{Cite web|url=https://space.skyrocket.de/doc_sdat/ekran.htm|title=Ekran (11F647)|website=Gunter's Space Page}}</ref>

===Internet television===
{{main|Streaming television}}
{{Distinguish|Smart television|Internet Protocol television|Web television}}

Internet television (Internet TV) (or online television) is the [[digital distribution]] of television content via the Internet as opposed to traditional systems like terrestrial, cable, and satellite, although the Internet itself is received by terrestrial, cable, or satellite methods. Internet television is a general term that covers the delivery of television series and other video content over the Internet by video streaming technology, typically by major traditional television broadcasters. Internet television should not be confused with [[Smart TV]], [[IPTV]], or with [[Web TV]]. [[Smart television]] refers to the television set which has a built-in operating system. Internet Protocol television (IPTV) is one of the emerging Internet television technology standards for use by television networks. [[Web television]] is a term used for programs created by a wide variety of companies and individuals for broadcast on Internet television.

Traditional cable and satellite television providers began to offer services such as [[Sling TV]], owned by Dish Network, which was unveiled in January 2015.<ref>Joshua Brustein (January 5, 2015). [https://web.archive.org/web/20150106181233/http://www.businessweek.com/articles/2015-01-05/dish-sling-tv-service-takes-on-cable-television "Dish's New Sling TV Service Could Free You From Cable"]. ''[[Bloomberg Businessweek]]''. [[Bloomberg LP]]. Retrieved January 12, 2015.</ref> [[DirecTV]], another satellite television provider, launched their own streaming service, [[DirecTV Stream]], in 2016.<ref>Spangler, Todd (2016-11-18). [https://variety.com/2016/digital/news/att-directv-now-launch-nov-28-1201921813/ "AT&T Sets DirecTV Now Launch Event for Nov. 28"]. ''Variety''. Retrieved 2017-12-05.</ref><ref>{{Cite news |title=LG to show off webOS 2.0 smart TV at CES 2015 |language=en |work=CNET |url=https://www.cnet.com/news/lg-to-show-off-webos-2-0-smart-tv-at-ces-2015/ |access-date=2017-12-05}}</ref> [[Sky UK|Sky]] launched a similar streaming service in the UK called [[Now (Sky)|Now]]. In 2013, [[Video on demand]] website [[Netflix]] earned the first [[Primetime Emmy Awards|Primetime Emmy Award]] nominations for original streaming television at the [[65th Primetime Emmy Awards]]. Three of its series, ''[[House of Cards (American TV series)|House of Cards]]'', ''[[Arrested Development]]'', and ''[[Hemlock Grove (TV series)|Hemlock Grove]]'', earned nominations that year.<ref>{{cite web |author=Stelter, Brian |date=2013-07-18 |title=Netflix Does Well in 2013 Primetime Emmy Nominations |url=http://artsbeat.blogs.nytimes.com/2013/07/18/watching-for-the-2013-primetime-emmy-nominations/ |access-date=2013-07-18 |work=[[The New York Times]]}}</ref> On July 13, 2015, cable company [[Comcast]] announced an [[HBO]] plus [[Broadcast television systems|broadcast TV]] package at a price discounted from basic [[broadband]] plus [[Cable television in the United States|basic cable]].<ref>{{cite web |last=Spangler |first=Todd |date=13 July 2015 |title=Comcast Aims at 'Cord-Nevers' with $15 HBO, Basic TV Internet-Streaming Bundle |url=https://variety.com/2015/digital/news/comcast-hbo-basic-tv-internet-bundle-1201538854/ |url-status=live |archive-url=https://web.archive.org/web/20171001082945/http://variety.com/2015/digital/news/comcast-hbo-basic-tv-internet-bundle-1201538854/ |archive-date=1 October 2017 |website=Variety }}</ref>

In 2017, YouTube launched [[YouTube TV]], a streaming service that allows users to watch live television programs from popular cable or network channels and record shows to stream anywhere, anytime.<ref>[https://tv.youtube.com/ "YouTube TV – Watch & DVR Live Sports, Shows & News"]. ''YouTube TV – Watch & DVR Live Sports, Shows & News''. Retrieved 2017-12-05.</ref><ref>{{cite news |last=Rajan |first=Amol |author-link=Amol Rajan |date=August 5, 2020 |title=TV watching and online streaming surge during lockdown |work=[[BBC News]] |url=https://www.bbc.com/news/entertainment-arts-53637305}}</ref><ref>{{cite news |last1=Levin |first1=Gary |last2=Lawler |first2=Kelly |last3=Keveney |first3=Bill |last4=Jensen |first4=Erin |date=March 11, 2021 |title=How pandemic changed TV, and how much of it will last |newspaper=[[USA Today]] |url=https://www.usatoday.com/story/entertainment/tv/2021/03/10/how-pandemic-changed-tv-and-how-much-last/6826073002/}}</ref> As of 2017, 28% of US adults cite streaming services as their main means for watching television, and 61% of those ages 18 to 29 cite it as their main method.<ref>[http://www.pewresearch.org/fact-tank/2017/09/13/about-6-in-10-young-adults-in-u-s-primarily-use-online-streaming-to-watch-tv/ "About 6 in 10 young adults in U.S. primarily use online streaming to watch TV"]. ''Pew Research Center''. 2017-09-13. Retrieved 2017-12-05.</ref><ref>{{cite web |last=Lovejoy |first=Ben |date=June 21, 2022 |title=Video streaming services see end of pandemic boom |url=https://9to5mac.com/2022/06/21/video-streaming-services-2/ |website=[[9to5Mac]]}}</ref> As of 2018, Netflix is the world's largest streaming TV network and also the world's largest Internet media and entertainment company with 117 million paid subscribers, and by revenue and market cap.<ref>{{Cite news |date=2018-01-22 |title=Netflix's Growth Is in the Eye of the Beholder |language=en |work=Bloomberg.com |url=https://www.bloomberg.com/opinion/articles/2018-01-22/netflix-earnings-growth-is-in-the-eye-of-the-beholder |access-date=2020-09-08}}</ref><ref>{{cite web |last=Balakrishnan |first=Anita |date=22 January 2018 |title=Netflix jumps more than 8% after adding more subscribers than expected |url=https://www.cnbc.com/2018/01/22/netflix-earnings-q4-2017.html |website=[[CNBC]]}}</ref> In 2020, the [[COVID-19 pandemic]] had a strong impact in the television streaming business with the lifestyle changes such as staying at home and lockdowns.<ref>{{cite web |last1=Fosty |first1=Vincent |last2=Houben |first2=Tim |date=March 2020 |title=Online media streaming will benefit from the coronavirus pandemic |url=https://www2.deloitte.com/be/en/pages/technology-media-and-telecommunications/articles/online-media-streaming.html |website=[[Deloitte]] Belgium |quote=... if it does not last too long! |access-date=4 November 2023 |archive-date=12 August 2023 |archive-url=https://web.archive.org/web/20230812100556/https://www2.deloitte.com/be/en/pages/technology-media-and-telecommunications/articles/online-media-streaming.html |url-status=dead }}</ref><ref>{{cite magazine |last=Dayal |first=Tanvi |date=July 23, 2022 |title=How The Pandemic Boosted Business For Streaming Services |url=https://www.jumpstartmag.com/how-the-pandemic-boosted-business-for-streaming-services/ |magazine=Jumpstart}}</ref><ref>{{Cite web |title=AUBTU.BIZ |url=https://aubtu.biz/ |access-date=2023-11-04 |language=en}}</ref><ref>{{cite web |date=April 2020 |title=Streaming Consumption Rises In U.S. Markets with Early Stay-at-Home Orders During COVID-19 |url=https://www.nielsen.com/insights/2020/streaming-consumption-rises-in-u-s-markets-with-early-stay-at-home-orders-during-covid-19/ |website=[[Nielsen Media Research]]}}</ref>

==Sets==
{{main|Television set}}

[[File:RCA 630-TS Television.jpg|thumb|right|RCA 630-TS, the first mass-produced television set, which sold in 1946–1947]]
A television set, also called a television receiver, television, TV set, TV, or "telly," is a device that combines a tuner, display, amplifier, and speakers for the purpose of viewing television and hearing its audio components. Introduced in the late 1920s in [[Mechanical television|mechanical]] form, television sets became a popular consumer product after World War II in electronic form, using [[cathode-ray tube]]s. The addition of color to broadcast television after 1953 further increased the popularity of television sets, and an outdoor antenna became a common feature of suburban homes. The ubiquitous television set became the display device for recorded media in the 1970s, such as [[Betamax]] and [[VHS]], which enabled viewers to record TV shows and watch prerecorded movies. In the subsequent decades, Television sets were used to watch DVDs and [[Blu-ray Disc]]s of movies and other content. Major TV manufacturers announced the discontinuation of CRT, DLP, plasma, and fluorescent-backlit LCDs by the mid-2010s. Televisions since 2010s mostly use [[LED-backlit LCD display|LEDs]].<ref name="cepro.com"/><ref name="tomsguide.com"/><ref name="Displaysearch.com">{{cite web|url=http://www.displaysearch.com/cps/rde/xchg/displaysearch/hs.xsl/140415_lcd_tv_growth_improving_as_plasma_and_crt_tv_disappear.asp|title= The Source for Critical Information and Insight|publisher=IHS Technology}}</ref><ref name="ReferenceA">{{cite web|url=https://www.cnet.com/news/rip-rear-projection-tv/|title=RIP, rear-projection TV|website=CNET|access-date=22 March 2015}}</ref> LEDs are expected to be gradually replaced by OLEDs in the near future.<ref name="oled-info.com"/>

===Display technologies===
{{main|Display device}}

====Disk====
{{main|Nipkow disk}}
The earliest systems employed a spinning disk to create and reproduce images.<ref>{{Cite book|url=https://archive.org/details/kingfisherscienc00tayl|url-access=registration|page=[https://archive.org/details/kingfisherscienc00tayl/page/370 370]|title=The Kingfisher Science Encyclopedia|last=Taylor|first=Charles|date=2000|publisher=Kingfisher|isbn=978-0-7534-5269-1}}</ref> These usually had a low resolution and screen size and never became popular with the public.

====CRT====
{{main|Cathode-ray tube}}
[[File:Crt14.jpg|thumb|left|upright=0.9|A 14-inch cathode-ray tube showing its deflection coils and electron guns]]
The cathode-ray tube (CRT) is a [[vacuum tube]] containing one or more [[electron gun]]s (a source of [[electrons]] or electron emitter) and a [[fluorescent]] screen used to view images.<ref name="crthistory"/> It has the means to accelerate and deflect the electron beam(s) onto the screen to create the images. The images may represent electrical [[waveform]]s ([[oscilloscope]]), pictures (television, [[computer monitor]]), [[radar]] targets or others. The CRT uses an evacuated glass envelope that is large, deep (i.e., long from front screen face to rear end), fairly heavy, and relatively fragile. As a matter of safety, the face is typically made of thick [[lead glass]] so as to be highly shatter-resistant and to block most [[X-ray]] emissions, particularly if the CRT is used in a consumer product.

In television sets and [[computer monitor]]s, the entire front area of the tube is scanned repetitively and systematically in a fixed pattern called a [[raster scan|raster]]. An image is produced by controlling the intensity of each of the three [[electron beams]], one for each additive primary color (red, green, and blue) with a [[video signal]] as a reference.<ref name='workings'>{{cite web|title=How Computer Monitors Work|date=16 June 2000 |url=http://computer.howstuffworks.com/monitor7.htm |access-date=4 October 2009 }}</ref> In all modern CRT monitors and televisions, the beams are bent by ''magnetic deflection'', a varying magnetic field generated by coils and driven by electronic circuits around the neck of the tube, although [[electrostatic deflection]] is commonly used in [[oscilloscope]]s, a type of diagnostic instrument.<ref name='workings' />

====DLP====
{{main|Digital Light Processing}}
[[File:Christie Mirage 5000.jpg|thumb|right|upright=0.9|The Christie Mirage 5000, a 2001 DLP projector]]
Digital Light Processing (DLP) is a type of [[video projector]] technology that uses a [[digital micromirror device]]. Some DLPs have a TV tuner, which makes them a type of TV display. It was originally developed in 1987 by Dr. [[Larry Hornbeck]] of [[Texas Instruments]]. While the DLP imaging device was invented by Texas Instruments, the first DLP-based projector was introduced by Digital Projection Ltd in 1997. Digital Projection and Texas Instruments were both awarded [[Emmy Awards]] in 1998 for the invention of the DLP projector technology. DLP is used in a variety of display applications, from traditional static displays to interactive displays and also non-traditional embedded applications, including medical, security, and industrial uses. DLP technology is used in DLP front projectors (standalone projection units for classrooms and businesses primarily) but also in private homes; in these cases, the image is projected onto a projection screen. DLP is also used in DLP rear projection television sets and digital signs. It is also used in about 85% of [[digital cinema]] projection.<ref>{{cite web|title=How Digital Light Processing Works|url=https://thre3d.com/how-it-works/light-photopolymerization/digital-light-processing-dlp|archive-url=https://web.archive.org/web/20140221025534/https://thre3d.com/how-it-works/light-photopolymerization/digital-light-processing-dlp|url-status=dead|archive-date=21 February 2014|publisher=THRE3D.com|access-date=3 February 2014}}</ref>

====Plasma====
{{main|Plasma display}}

A [[plasma TV|plasma]] display panel (PDP) is a type of [[flat-panel display]] common to large television displays {{convert|30|in|cm}} or larger. They are called "[[Plasma (physics)|plasma]]" displays because the technology uses small cells containing [[electrically]] [[electric charge|charged]] [[ionized]] [[gases]], or what are in essence chambers more commonly known as [[fluorescent lamp]]s.
{{Clear}}

====LCD====
{{main|Liquid-crystal display}}
[[File:LCD generic tv.jpg|thumb|right|upright=0.9|A generic LCD TV, with speakers on either side of the screen]]
Liquid-crystal-display televisions (LCD TVs) are television sets that use [[liquid-crystal display]] technology to produce images. [[LCD television]]s are much thinner and lighter than [[cathode-ray tube]] (CRTs) of similar display size and are available in much larger sizes (e.g., 90-inch diagonal). When manufacturing costs fell, this combination of features made LCDs practical for television receivers. LCDs come in two types: those using [[cold cathode]] fluorescent lamps, simply called LCDs, and those using [[LED]] as backlight called [[LED-backlit LCD television|LEDs]].

In 2007, LCD television sets surpassed sales of CRT-based television sets worldwide for the first time, and their sales figures relative to other technologies accelerated. LCD television sets have quickly displaced the only major competitors in the large-screen market, the [[Plasma display]] panel and [[rear-projection television]].<ref>{{cite web | url=http://www.dailytech.com/Report+Shipments+of+LCD+TVs+Surpass+CRT+TVs/article10775.htm | title=Hardware Report: Shipments of LCD TVs Surpass CRT TVs | publisher=DailyTech LLC. | access-date=20 February 2016 | archive-date=4 March 2016 | archive-url=https://web.archive.org/web/20160304072736/http://www.dailytech.com/Report+Shipments+of+LCD+TVs+Surpass+CRT+TVs/article10775.htm | url-status=dead }}</ref> In mid 2010s LCDs especially LEDs became, by far, the most widely produced and sold television display type.<ref name="Displaysearch.com" /><ref name="ReferenceA"/> LCDs also have disadvantages. Other technologies address these weaknesses, including [[organic light-emitting diode|OLEDs]], [[Field-emission display|FED]] and [[Surface-conduction electron-emitter display|SED]], but {{as of|2014|lc=on}} none of these have entered widespread production.

====OLED====
{{main|OLED}}
[[File:LG전자, 깜빡임 없는 55인치 3D OLED TV 공개(2).jpg|thumb|left|OLED TV]]

An OLED (organic light-emitting diode) is a [[light-emitting diode]] (LED) in which the [[emission (electromagnetic radiation)|emissive]] [[electroluminescence|electroluminescent]] layer is a film of [[organic compound]] which emits light in response to an electric current. This layer of [[organic semiconductor]] is situated between two electrodes. Generally, at least one of these electrodes is transparent. OLEDs are used to create [[digital display]]s in devices such as [[television set|television]] screens. It is also used for computer monitors and portable systems such as [[mobile phones]], [[handheld game console]], and [[personal digital assistant|PDAs]].

There are two main groups of OLED: those based on small [[molecule]]s and those employing [[polymer]]s. Adding mobile [[ion]]s to an OLED creates a [[light-emitting electrochemical cell]] or LEC, which has a slightly different mode of operation. OLED displays can use either [[Passive matrix addressing|passive-matrix]] (PMOLED) or [[Active matrix addressing|active-matrix]] (AMOLED) addressing schemes. Active-matrix OLEDs require a [[thin-film transistor]] backplane to switch each individual pixel on or off but allow for higher resolution and larger display sizes.

An OLED display works without a [[backlight]]. Thus, it can display deep [[black level]]s and can be thinner and lighter than a [[liquid crystal display]] (LCD). In low ambient light conditions such as a dark room, an OLED screen can achieve a higher [[contrast ratio]] than an LCD, whether the LCD uses [[cold cathode]] fluorescent lamps or [[LED-backlit LCD television|LED backlight]]. OLEDs are expected to replace other forms of display in the near future.<ref name="oled-info.com"/>

===Display resolution===
[[File:8K UHD, 5K, 4K UHD, FHD and SD.svg|upright=1.3|thumb|Comparison of 8K [[Ultra-high-definition television|UHDTV]], 4K [[Ultra-high-definition television|UHDTV]], [[High-definition television|HDTV]] and [[Standard-definition television|SDTV]] resolution]]

====LD====
{{main|Low-definition television}}

Low-definition television or LDTV refers to television systems that have a lower screen resolution than standard-definition television systems such [[240p]] (320*240). It is used in [[handheld television]]. The most common source of LDTV programming is the Internet, where mass distribution of higher-resolution [[video file]]s could overwhelm [[computer server]]s and take too long to download. Many mobile phones and portable devices such as [[Apple Inc.|Apple]]'s [[iPod Nano]], or Sony's [[PlayStation Portable]] use LDTV video, as higher-resolution files would be excessive to the needs of their small screens ([[QVGA|320×240]] and 480×272 [[pixel]]s respectively). The current generation of iPod Nanos has LDTV screens, as do the first three generations of [[iPod Touch]] and [[iPhone]] (480×320). For the first years of its existence, YouTube offered only one low-definition resolution of 320x240p at 30fps or less. A standard, consumer-grade [[videotape]] can be considered SDTV due to its resolution (approximately 360 × 480i/576i).

====SD====
{{main|Standard-definition television}}

Standard-definition television or SDTV refers to two different resolutions: [[576i]], with 576 [[interlaced video|interlaced]] lines of resolution, derived from the European-developed [[PAL]] and [[SECAM]] systems, and [[480i]] based on the American National Television System Committee [[NTSC]] system. SDTV is a television system that uses a resolution that is not considered to be either [[high-definition television]] ([[720p]], [[1080i]], [[1080p]], [[1440p]], [[4K UHDTV]], and [[8K UHD]]) or [[enhanced-definition television]] (EDTV [[480p]]). In North America, digital SDTV is broadcast in the same [[4:3]] aspect ratio as NTSC signals, with widescreen content being [[center cut]].<ref>{{cite web|url=http://www.fcc.gov/cgb/consumerfacts/digitaltv.html|title=Digital Television|date=28 February 2013|access-date=25 May 2016|archive-date=8 March 2008|archive-url=https://web.archive.org/web/20080308190335/http://www.fcc.gov/cgb/consumerfacts/digitaltv.html/|url-status=dead}}</ref> However, in other parts of the world that used the PAL or SECAM color systems, standard-definition television is now usually shown with a [[16:9]] [[aspect ratio (image)|aspect ratio]], with the transition occurring between the mid-1990s and mid-2000s. Older programs with a 4:3 aspect ratio are shown in the United States as 4:3, with non-ATSC countries preferring to reduce the horizontal resolution by anamorphically scaling a [[pillarbox]]ed image.

====HD====
{{main|High-definition television}}

High-definition television (HDTV) provides a [[Image resolution|resolution]] that is substantially higher than that of [[standard-definition television]].

HDTV may be transmitted in various formats:
* [[1080p]]: 1920×1080p: 2,073,600 pixels (~2.07 [[megapixel]]s) per [[frame (video)|frame]]
* [[1080i]]: 1920×1080i: 1,036,800 pixels (~1.04 MP) per [[field (video)|field]] or 2,073,600 pixels (~2.07 MP) per frame
** A non-standard CEA resolution exists in some countries such as 1440×1080i: 777,600 pixels (~0.78 MP) per field or 1,555,200 pixels (~1.56 MP) per frame<!-- Do not delete this; it is used for all free-to-air HDTV in the UK (and probably elsewhere) and is also used by various home recording equipment. See also the 1080i article. -->
* [[720p]]: 1280×720p: 921,600 pixels (~0.92 MP) per frame

====UHD====
{{main|Ultra-high-definition television}}

Ultra-high-definition television (also known as Super Hi-Vision, Ultra HD television, UltraHD, UHDTV, or [[XVGA#UHD (4K) (3840×2160)|UHD]]) includes [[4K resolution#Resolutions|4K UHD]] (2160p) and [[8K resolution#Resolutions|8K UHD]] (4320p), which are two [[digital video]] formats proposed by [[NHK Science & Technology Research Laboratories]] and defined and approved by the [[International Telecommunication Union]] (ITU). The [[Consumer Electronics Association]] announced on 17 October 2012 that "Ultra High Definition," or "Ultra HD," would be used for displays that have an [[display aspect ratio|aspect ratio]] of at least 16:9 and at least one digital input capable of carrying and presenting natural video at a minimum resolution of 3840×2160 pixels.<ref>{{Citation | url = http://www.ultrahdtv.net/what-is-ultra-hdtv/ | title = What is Ultra HDTV? | newspaper = Ultra HDTV Magazine | date = 5 February 2008 | access-date = 27 October 2013}}</ref><ref>{{Citation | url = http://www.ultrahdtv.net/the-ultimate-guide-to-4k-and-8k-ultra-hd/ | title = The Ultimate Guide to 4K Ultra HD | newspaper = Ultra HDTV Magazine | date = 28 July 2013 | access-date = 27 October 2013}}</ref>

===Market share===
North American consumers purchase a new television set on average every seven years, and the average household owns 2.8 televisions. {{as of|2011}}, 48 million are sold each year at an average price of $460 and size of {{convert|38|in|cm|abbr=on}}.<ref name="martin20111227">{{cite news | url=https://www.nytimes.com/2011/12/27/business/tv-prices-fall-squeezing-most-makers-and-sellers.html | title=Plummeting TV Prices Squeeze Makers and Sellers | work=The New York Times | date=27 December 2011 | access-date=27 December 2011 | author=Martin, Andrew | page=B1}}</ref>

{| class="wikitable" style="width:35%;"
|-
!colspan=3| Worldwide TV manufacturers market share, H1 2023
|-
!|Manufacturer
!|Market share<ref>{{Cite web |last=Global |first=K. E. D. |title=Samsung, LG Electronics top 2 global TV makers in H1 |url=https://www.kedglobal.com/electronics/newsView/ked202308210021 |access-date=2023-10-18 |website=KED Global |language=en}}</ref>
|-
|| [[Samsung Electronics]] || 31.2%
|-
|| [[LG Electronics]]|| 16.2%
|-
|| [[TCL Corporation|TCL]]|| 10.2%
|-
|| [[Hisense]] || 9.5%
|-
|| [[Sony]]|| 5.7%
|-
|| Others || 39%
|}

==Content==
===Programming===
{{See also|Television show|Video production|Television studio}}
Getting TV programming shown to the public can happen in many other ways. After production, the next step is to market and deliver the product to whichever markets are open to using it. This typically happens on two levels:

# Original run or First run: a producer creates a program of one or multiple episodes and shows it on a station or network that has either paid for the production itself or granted a license by the television producers to do the same.
# [[Broadcast syndication]]: this is the terminology rather broadly used to describe secondary programming usages (beyond the original run). It includes secondary runs in the country of the first issue, but also international usage, which may not be managed by the originating producer. In many cases, other companies, television stations, or individuals are engaged to do the syndication work, in other words, to sell the product into the markets they are allowed to sell into by contract from the copyright holders; in most cases, the producers.

First-run programming is increasing on subscription services outside of the United States, but few domestically produced programs are syndicated on domestic [[free-to-air]] (FTA) elsewhere. This practice is increasing, however, generally on digital-only FTA channels or with subscriber-only, first-run material appearing on FTA. Unlike the United States, repeat FTA screenings of an FTA network program usually only occur on that network. Also, [[Network affiliate|affiliates]] rarely buy or produce non-network programming that is not focused on [[local programming]].

===Genres===
{{Globalize|section|USA|2name=the United States|date=December 2014}}
[[Television genre]]s include a broad range of programming types that entertain, inform, and educate viewers. The most expensive entertainment genres to produce are usually dramas and dramatic [[miniseries]]. However, other genres, such as historical Western genres, may also have high production costs.

Pop culture entertainment genres include action-oriented shows such as police, crime, detective dramas, horror, or thriller shows. As well, there are also other variants of the drama genre, such as [[medical drama]]s and daytime soap operas. Sci-fi series can fall into either the drama or action category, depending on whether they emphasize philosophical questions or high adventure. Comedy is a popular genre that includes situation comedy (sitcom) and animated series for the adult demographic, such as Comedy Central's ''[[South Park]]''.

The least expensive forms of entertainment programming genres are game shows, talk shows, variety shows, and [[reality television]]. Game shows feature contestants answering questions and solving puzzles to win prizes. Talk shows contain interviews with film, television, music, and sports [[celebrity|celebrities]] and public figures. Variety shows feature a range of musical performers and other entertainers, such as comedians and magicians, introduced by a host or [[Master of Ceremonies]]. There is some crossover between some talk shows and variety shows because leading talk shows often feature performances by bands, singers, comedians, and other performers in between the interview segments. Reality television series "regular" people (i.e., not actors) facing unusual challenges or experiences ranging from arrest by police officers (''[[Cops (TV series)|COPS]]'') to significant weight loss (''[[The Biggest Loser]]''). A derived version of reality shows depicts celebrities doing mundane activities such as going about their everyday life (''[[The Osbournes]]'', ''[[Snoop Dogg's Father Hood]]'') or doing regular jobs (''[[The Simple Life]]'').<ref>{{Cite web|url=https://www.ranker.com/list/best-celebrity-reality-shows/ranker-tv|title=The 100+ Best Celebrity Reality TV Shows, Ranked|website=Ranker}}</ref>

Fictional television programs that some television scholars and broadcasting advocacy groups argue are "[[quality television]]", include series such as ''[[Twin Peaks]]'' and ''[[The Sopranos]]''. Kristin Thompson argues that some of these television series exhibit traits also found in [[art film]]s, such as psychological realism, narrative complexity, and ambiguous plotlines. Nonfiction television programs that some television scholars and broadcasting advocacy groups argue are "quality television" include a range of serious, noncommercial programming aimed at a niche audience, such as documentaries and public affairs shows.

===Funding===
[[File:TV users.svg|thumb|upright=1.6|Television sets per 1000 people of the world
{| style="width: 250px;"
|-
| {{legend|#10547C|1000+}} || {{legend|#70BEED|100–200}}
|-
| {{legend|#1674AB|500–1000}} || {{legend|#9DD2F2|50–100}}
|-
| {{legend|#1B8BCF|300–500}} || {{legend|#CCE8F9|0–50}}
|-
| {{legend|#3CA6E6|200–300}} || {{legend|Grey|No data}}
|}
]]

Around the world, broadcast television is financed by government, advertising, licensing (a form of tax), subscription, or any combination of these. To protect revenues, subscription television channels are usually encrypted to ensure that only subscribers receive the decryption codes to see the signal. Unencrypted channels are known as free-to-air or FTA. In 2009, the global TV market represented 1,217.2&nbsp;million TV households with at least one TV and total revenues of 268.9&nbsp;billion EUR (declining 1.2% compared to 2008).<ref>[http://www.international-television.org/tv_market_data/world-tv-market-2010.html Global TV 2010 – Markets, Trends Facts & Figures (2008–2013)] International Television Expert Group</ref> North America had the biggest TV revenue market share with 39% followed by Europe (31%), Asia-Pacific (21%), Latin America (8%), and Africa and the Middle East (2%).<ref>[http://www.international-television.org/tv_market_data/global-tv-revenues-2008-2009.html Global TV Revenues (2008–09)] International Television Expert Group</ref> Globally, the different TV revenue sources are divided into 45–50% TV advertising revenues, 40–45% subscription fees, and 10% public funding.<ref>[http://www.international-television.org/tv_market_data/world-tv-market-2010.html iDate's Global TV Revenue Market Shares] International Television Expert Group</ref><ref>[http://www.international-television.org/tv_market_data/international_television_market_report_2009.html OFCOM's Global TV Market Report 2009] International Television Expert Group</ref>

====Advertising====
{{main|Television advertisement}}

Television's broad reach makes it a powerful and attractive medium for advertisers. Many television networks and stations sell blocks of broadcast time to advertisers ("sponsors") to fund their programming.<ref name="Hornick">[http://www.americanheritage.com/articles/magazine/ah/2006/5/2006_5_50.shtml Karen Hornick] {{webarchive|url=https://web.archive.org/web/20100917000611/http://www.americanheritage.com/articles/magazine/ah/2006/5/2006_5_50.shtml |date=17 September 2010 }} "That Was the Year That Was" ''American Heritage'', Oct. 2006.</ref> Television advertisements (variously called a television commercial, commercial, or ad in [[American English]], and known in [[British English]] as an advert) is a span of television programming produced and paid for by an organization, which conveys a message, typically to market a product or service. Advertising revenue provides a significant portion of the funding for most privately owned television networks. The vast majority of television advertisements today consist of brief advertising spots, ranging in length from a few seconds to several minutes (as well as program-length [[infomercial]]s). Advertisements of this sort have been used to promote a wide variety of goods, services, and ideas since the beginning of television.

[[File:Radio News Sep 1928 Cover.jpg|thumb|right|Television was still in its experimental phase in 1928, but the medium's potential to sell goods was already predicted.]]

The effects of television advertising upon the viewing public (and the effects of mass media in general) have been the subject of discourse by philosophers, including [[Marshall McLuhan]]. The viewership of television programming, as measured by companies such as [[Nielsen Media Research]], is often used as a metric for television advertisement placement and, consequently, for the rates charged to advertisers to air within a given network, television program, or time of day (called a "daypart"). In many countries, including the United States, television [[Campaign advertising|campaign advertisements]] is considered indispensable for a [[political campaign]]. In other countries, such as France, political advertising on television is heavily restricted,<ref>Fritz Plasser, ''Global Political Campaigning'', p226</ref> while some countries, such as [[Norway]], completely ban political advertisements.

The first official, paid television advertisement was broadcast in the United States on 1 July 1941, over New York station WNBT (now [[WNBC]]) before a baseball game between the [[Brooklyn Dodgers]] and [[Philadelphia Phillies]]. The announcement for [[Bulova]] watches, for which the company paid anywhere from $4.00 to $9.00 (reports vary), displayed a WNBT test pattern modified to look like a clock with the hands showing the time. The Bulova logo, with the phrase "Bulova Watch Time," was shown in the lower right-hand quadrant of the test pattern while the second hand swept around the dial for one minute.<ref>Stewart, R.W., "Imagery For Profit", ''The New York Times'', 6 July 1941.</ref><ref>{{Cite web|url=http://www.earlytelevision.org/images/rca_bulova_ad-1.jpg|title=WNBT/Bulova test pattern}}</ref> The first TV ad broadcast in the U.K. was on [[ITV (TV network)|ITV]] on 22 September 1955, advertising [[Gibbs SR]] toothpaste. The first TV ad broadcast in Asia was on [[Nippon Television]] in Tokyo on 28 August 1953, advertising [[Seikosha]] (now [[Seiko]]), which also displayed a clock with the current time.<ref>[[:ja:コマーシャルメッセージ|コマーシャルメッセージ (Commercial message)]]. Retrieved 24 November 2013{{Circular reference|date=September 2015}}</ref>

====United States====
Since inception in the US in 1941,<ref>{{cite web |title=1940–1949 C.E.: Media History Project: U of M |url=http://www.mediahistory.umn.edu/timeline/1940-1949.html |url-status=dead |publisher=Mediahistory.umn.edu |date=18 May 2012 |access-date=2 November 2012 |archive-url=https://web.archive.org/web/20121025200852/http://www.mediahistory.umn.edu/timeline/1940-1949.html |archive-date=25 October 2012}}</ref> television commercials have become one of the most effective, persuasive, and popular methods of selling products of many sorts, especially consumer goods. During the 1940s and into the 1950s, programs were hosted by single advertisers. This, in turn, gave great creative control to the [[advertiser]]s over the content of the show. Perhaps due to the [[quiz show scandals]] in the 1950s,<ref>{{cite web|url=https://www.pbs.org/wgbh/amex/quizshow/peopleevents/pande07.html |title=The American Experience &#124; People & Events &#124; The Aftermath of the Quiz Show Scandal |publisher=PBS |access-date=2 November 2012}}</ref> networks shifted to the magazine concept, introducing advertising breaks with other advertisers.

U.S. advertising rates are determined primarily by [[Nielsen ratings]]. The time of the day and popularity of the channel determine how much a TV commercial can cost. For example, it can cost approximately $750,000 for a 30-second block of commercial time during the highly popular singing competition ''[[American Idol]]'', while the same amount of time for the [[Super Bowl]] can cost several million dollars. Conversely, lesser-viewed [[time slot]]s, such as early mornings and weekday afternoons, are often sold in bulk to producers of [[infomercial]]s at far lower rates. In recent years, paid programs or infomercials have become common, usually in lengths of 30 minutes or one hour. Some [[Pharmaceutical company|drug companies]] and other businesses have even created "news" items for broadcast, known in the industry as [[video news release]]s, paying [[program director]]s to use them.<ref>[[Jon Stewart]] of ''[[The Daily Show]]'' was mock-outraged at this, saying, "That's what we do!" and calling it a new form of television, "infoganda."</ref>

Some television programs also deliberately place products into their shows as advertisements, a practice started in feature films<ref>{{cite book |last=Segrave |first=Kerry |title=Product Placement in Hollywood Films |year=1994 |publisher=McFarland |isbn= 978-0-7864-1904-3}}</ref> and known as [[product placement]]. For example, a character could be drinking a certain kind of soda, going to a particular [[Restaurant chain|chain restaurant]], or driving a certain make of car. (This is sometimes very subtle, with shows having vehicles provided by manufacturers for low cost in exchange as a [[product placement]]). Sometimes, a specific brand or [[Trademark|trade mark]], or music from a certain artist or group, is used. (This excludes guest appearances by artists who perform on the show.)

====United Kingdom====
The TV regulator oversees TV advertising in the United Kingdom. Its restrictions have applied since the early days of commercially funded TV. Despite this, an early TV mogul, [[Roy Thomson, 1st Baron Thomson of Fleet|Roy Thomson]], likened the broadcasting license as being a "license to print money".<ref>{{cite web |url=http://www.pressgazette.co.uk/story.asp?storyCode=34783&sectioncode=1 |archive-url=https://web.archive.org/web/20110616115610/http://www.pressgazette.co.uk/story.asp?storyCode=34783&sectioncode=1 |archive-date=16 June 2011 |title=Kenneth Roy Thomson |work=Press Gazette |date=7 July 2006 |access-date=24 April 2010}}</ref> Restrictions mean that the big three national commercial TV channels: [[ITV (TV channel)|ITV]], [[Channel 4]], and [[Channel 5 (UK)|Channel 5]] can show an average of only seven minutes of advertising per hour (eight minutes in the peak period). Other broadcasters must average no more than nine minutes (twelve in the peak). This means that many imported TV shows from the U.S. have unnatural pauses where the British company does not use the narrative breaks intended for more frequent U.S. advertising. Advertisements must not be inserted in the course of certain specific proscribed types of programs that last less than half an hour in scheduled duration; this list includes any news or current affairs programs, documentaries, and programs for children; additionally, advertisements may not be carried in a program designed and broadcast for reception in schools or in any [[religious broadcasting]] service or other devotional program or during a formal Royal ceremony or occasion. There also must be clear demarcations in time between the programs and the advertisements. The [[BBC]], being strictly non-commercial, is not allowed to show adverts on television in the U.K., though it has advertising-funded channels abroad. The majority of its budget comes from [[television license]] fees (see below) and [[broadcast syndication]], the sale of content to other broadcasters.<ref>{{Cite web|url=https://www.birminghammail.co.uk/news/uk-news/bbc-licence-fee-introduced-what-22775309|title=The government is planning to scrap the BBC's licence fee|first=Tom|last=Blackburn|date=17 January 2022|website=Birmingham Live}}</ref><ref>{{Cite web|url=https://fullfact.org/news/bbc-income/|title=How the BBC makes money|date=10 May 2021|website=Full Fact}}</ref>

====Ireland====
Broadcast advertising is regulated by the [[Broadcasting Authority of Ireland]].<ref>[http://www.bai.ie/wordpress/wp-content/uploads/General-Commercial-Communications-Code.pdf General Commercial Communications Code] ({{webarchive |url=https://web.archive.org/web/20120617110756/http://www.bai.ie/wordpress/wp-content/uploads/General-Commercial-Communications-Code.pdf |date=17 June 2012 }}) and [http://www.bai.ie/wordpress/wp-content/uploads/Childrens-Commercial-Communications-Code.pdf Children's Commercial Communications Code], referenced in: {{cite web|url=http://www.bai.ie/index.php/2010/05/bai-launches-revised-broadcasting-codes/|title=BAI launches Revised Broadcasting Codes|date=May 2010|publisher=Broadcasting Authority of Ireland|access-date=1 May 2016}};</ref>

====Subscription====
Some TV channels are partly funded from [[subscription]]s; therefore, the signals are encrypted during the broadcast to ensure that only the paying subscribers have access to the decryption codes to watch [[pay television]] or [[specialty channel]]s. Most subscription services are also funded by advertising.

====Taxation or license====
Television services in some countries may be funded by a [[television licence]] or a form of taxation, which means that advertising plays a lesser role or no role at all. For example, some channels may carry no advertising at all and some very little, including:
* Australia ([[Australian Broadcasting Corporation|ABC Television]])
* [[Belgium]] ([[VRT (broadcaster)|VRT]] for [[Flanders]] and [[RTBF]] for [[Wallonia]])
* [[Denmark]] ([[Danmarks Radio|DR]])
* Ireland ([[RTÉ]])
* Japan ([[NHK]])
* [[Norway]] ([[NRK]])
* Sweden ([[Sveriges Television|SVT]])
* [[Switzerland]] ([[Swiss Broadcasting Corporation|SRG SSR]])
* [[Taiwan|Republic of China (Taiwan)]] ([[Public Television Service|PTS]])
* United Kingdom ([[BBC Television]])
* United States ([[PBS]])

The [[British Broadcasting Corporation]]'s TV service carries no [[television advertising]] on its UK channels and is funded by an annual television license paid by the occupiers of premises receiving live telecasts. {{as of|2012}} it was estimated that approximately 26.8&nbsp;million UK private domestic households owned televisions, with approximately 25 million TV licences in all premises in force as of 2010.<ref>{{cite web|url=http://www.tvlicensing.co.uk/about/foi-licences-facts-and-figures-AB18/|title=TV Licensing-FOI: Licences facts and figures |publisher=tvlicensing.co.uk |access-date=10 December 2012}}</ref> This television license fee is set by the government, but the BBC is not answerable to or controlled by the government.{{citation needed|date=June 2021}} {{as of|2009}} two main BBC TV channels were watched by almost 90% of the population each week and overall had 27% share of total viewing,<ref>{{cite web|url=http://www.barb.co.uk/viewingsummary/weekreports.cfm?report=multichannel&requesttimeout=500&flag=viewingsummary |title=viewing statistics in UK |publisher=Barb.co.uk |access-date=17 April 2009 |url-status=dead |archive-url=https://web.archive.org/web/20081005045049/http://www.barb.co.uk/viewingsummary/weekreports.cfm?report=multichannel&requesttimeout=500&flag=viewingsummary |archive-date=5 October 2008 }}</ref> despite the fact that 85% of homes were multi-channel, with 42% of these having access to 200 free-to-air channels via satellite and another 43% having access to 30 or more channels via [[Freeview (UK)|Freeview]].<ref>{{cite web|url=http://www.ofcom.org.uk/research/tv/reports/dtv/dtv_2007_q3/dtvq307.pdf |title=The Communications Market: Digital Progress Report – Digital TV, Q3 2007 |access-date=18 June 2010 |archive-url = https://web.archive.org/web/20080625013029/http://www.ofcom.org.uk/research/tv/reports/dtv/dtv_2007_q3/dtvq307.pdf |archive-date = 25 June 2008}}</ref> {{as of|June 2021}} the licence that funds the advertising-free BBC TV channels cost £159 for a colour TV Licence and £53.50 for a black and white TV Licence (free or reduced for some groups).<ref>{{cite web | title=TV Licence types and costs | website=TV Licensing | url=https://www.tvlicensing.co.uk/check-if-you-need-one/topics/tv-licence-types-and-costs-top2 | access-date=15 June 2021| url-status= live|archive-url= https://web.archive.org/web/20210502005124/https://www.tvlicensing.co.uk/check-if-you-need-one/topics/tv-licence-types-and-costs-top2 | archive-date= 2 May 2021}}</ref>

The [[Australian Broadcasting Corporation]]'s television services in Australia carry no advertising by external sources; it is banned under the ''Australian Broadcasting Corporation Act 1983'', which also ensures its editorial independence. The ABC receives most of its funding from the [[Australian Government]] (some revenue is received from its [[ABC Commercial|Commercial division]]), but it has suffered progressive funding cuts under [[Liberal Party of Australia|Liberal]] governments since the 1996 [[Howard government]],<ref>{{cite web | last=Muller | first=Denis | title=Australian governments have a long history of trying to manipulate the ABC – and it's unlikely to stop now | website=[[The Conversation (website)|The Conversation]] | date=13 February 2019 | url=http://theconversation.com/australian-governments-have-a-long-history-of-trying-to-manipulate-the-abc-and-its-unlikely-to-stop-now-110712 | access-date=15 June 2021}}</ref> with particularly deep cuts in 2014 under the [[Turnbull government]],<ref>{{cite web | last=Yussuf | first=Ahmed | title=Turnbull confirms $254 million cut from ABC funding | website=ABC News | date=19 November 2014 | url=https://www.abc.net.au/news/2014-11-19/abc-funding-cuts-announced-by-malcolm-turnbull/5902774 | access-date=15 June 2021}}</ref> and an ongoing [[indexation]] freeze {{as of|lc=yes|2021}}.<ref>{{cite web | last=Duke | first=Jennifer | title=Was the ABC's funding cut? | website=[[The Sydney Morning Herald]] | date=16 August 2020 | url=https://www.smh.com.au/national/was-the-abc-s-funding-cut-20200814-p55lvr.html | access-date=15 June 2021}}</ref><ref>{{cite web | last1=Wake | first1=Alexandra | last2=Ward | first2=Michael | title=Latest $84 million cuts rip the heart out of the ABC, and our democracy | website=The Conversation | date=24 June 2020 | url=http://theconversation.com/latest-84-million-cuts-rip-the-heart-out-of-the-abc-and-our-democracy-141355 | access-date=15 June 2021}}</ref> The funds provide for the [[ABC Television (Australian TV network)|ABC's television]], [[ABC Radio (Australia)|radio]], [[ABC Online|online]], and international outputs, although [[ABC Australia (Southeast Asian TV channel)|ABC Australia]], which broadcasts throughout the Asia-Pacific region, receives additional funds through [[DFAT]] and some advertising on the channel.<ref>{{cite web | title=ABC Services in the Asia-Pacific | website=About the ABC |first= James|last= Spigelman| author-link= James Spigelman| date=8 December 2014 | url=https://about.abc.net.au/speeches/abc-services-in-the-asia-pacific/ | access-date=15 June 2021}}</ref><ref>{{cite web | last1=O’Keeffe | first1=Annmaree | last2=Greene | first2=Chris | title=International Public Broadcasting: A Missed Opportunity For Projecting Australia's Soft Power | website=[[Lowy Institute]] | date=10 December 2019 | url=https://www.lowyinstitute.org/publications/international-public-broadcasting-missed-opportunity-projecting-australia-s-soft-power | access-date=15 June 2021}}</ref>

In France, government-funded channels carry advertisements, yet those who own television sets have to pay an annual tax ("la redevance audiovisuelle").<ref>[http://www.minefi.gouv.fr/paca/minefi_relais_sociaux/impots/fiche21.html Ministry of Finance] {{webarchive |url=https://web.archive.org/web/20070501212316/http://www.minefi.gouv.fr/paca/minefi_relais_sociaux/impots/fiche21.html |date=1 May 2007 }}</ref>

In Japan, [[NHK]] is paid for by license fees (known in Japanese as {{nihongo| reception fee |受信料|Jushinryō}}). The broadcast law that governs NHK's funding stipulates that any television equipped to receive NHK is required to pay. The fee is standardized, with discounts for office workers and students who commute, as well as a general discount for residents of Okinawa prefecture.

===Broadcast programming===
{{main|Broadcast programming}}
{{see also|TV listings (UK)}}
Broadcast programming, or TV listings in the United Kingdom, is the practice of organizing television programs in a schedule, with broadcast automation used to regularly change the scheduling of TV programs to build an audience for a new show, retain that audience, or compete with other broadcasters' programs.

==Social aspects==
{{main|Social aspects of television|Television consumption}}
[[File:Family watching television 1958.jpg|thumb|upright=0.9|American family watching television, {{Circa|1958}}]]
Television has played a pivotal role in the socialization of the 20th and 21st centuries. There are many aspects of television that can be addressed, including negative issues such as [[media violence]]. Current research is discovering that individuals suffering from social isolation can employ television to create what is termed a [[parasocial interaction|parasocial]] or faux relationship with characters from their favorite television shows and movies as a way of deflecting feelings of loneliness and social deprivation.<ref name="scientificamerican.com">Butler, Fionnuala, Cynthia Pickett. "Imaginary Friends." ''Scientific American''. 28 July 2009. Web. 26 March 2010. http://www.scientificamerican.com/article.cfm?id=imaginary-friends</ref> Several studies have found that [[educational television]] has many advantages. The article "The Good Things about Television"<ref name="good-things-about-tv">{{cite web|url=http://www.media-awareness.ca/english/parents/television/good_things_tv.cfm|archive-url=https://web.archive.org/web/20060203124845/http://www.media-awareness.ca/english/parents/television/good_things_tv.cfm|url-status=dead|archive-date=3 February 2006|title=The Good Things About Television}}</ref> argues that television can be a very powerful and effective learning tool for children if used wisely. With respect to faith, many [[Christian denominations]] use television for [[religious broadcasting]].

===Religious opposition===
[[Methodist]] denominations in the [[conservative holiness movement]], such as the [[Allegheny Wesleyan Methodist Connection]] and the [[Evangelical Wesleyan Church]], eschew the use of the television.<ref name="Marty1980">{{cite book |last=Marty |first=Martin E. |title=Where the Spirit Leads: American Denominations Today |date=1980 |publisher=[[John Knox Press]] |isbn=978-0-8042-0868-0 |page=88}}</ref> Some [[Baptists]], such as those affiliated with [[Pensacola Christian College]],<ref>{{cite web|url=https://www.pcci.edu/Handbook/FacilitiesServices/Technology.aspx|title=Technology Handbook|access-date=2 May 2021|publisher=[[Pensacola Christian College]]}}</ref> also eschew television. Many [[Traditional Catholic]] congregations such as the [[Society of Saint Pius X]] (SSPX), as with [[Laestadianism|Laestadian Lutherans]], and Conservative Anabaptists such as the [[Dunkard Brethren Church]], oppose the presence of television in the household, teaching that it is an [[occasion of sin]].<ref>{{cite web |title=Television: An Occasion of Sin? |url=https://www.sspxasia.com/Documents/Catholic_Morality/TV-Occasion-of-Sin.htm |publisher=[[Society of Saint Pius X]] |access-date=5 May 2021}}</ref><ref name="Lamport2017">{{cite book |last=Lamport |first=Mark A. |title=Encyclopedia of Martin Luther and the Reformation |date=31 August 2017 |publisher=[[Rowman & Littlefield]] |isbn=978-1-4422-7159-3 |page=409}}</ref><ref>{{cite web |title=The Kingdom of God, the Fellowship of the Saints |url=https://www.llchurch.org/resources/the-kingdom-of-god-the-fellowship-of-the-saints |publisher=[[Laestadian Lutheran Church]] |access-date=16 September 2021 |date=7 July 2007 |author=David Anderson}}</ref><ref name="DBC2021">{{cite book |title=Dunkard Brethren Church Polity |date=1 November 2021 |publisher=[[Dunkard Brethren Church]] |page=8}}</ref>

==Negative impacts==
Children, especially those aged five or younger, are at risk of injury from falling televisions.<ref name=Ferguson2012>{{cite book | url = https://www.safekids.org/sites/default/files/documents/ResearchReports/TV%20Tipovers%20Research%20Rpt.pdf | last1 = Ferguson | first1 = RW | last2 = Mickalide | first2 = AD | title = A Report to the Nation on Home Safety: The Dangers of TV Tip-Overs | location = Washington, D.C. | publisher = [[Safe Kids Worldwide]] | date = December 2012 | archive-url = https://web.archive.org/web/20150906191453/https://www.safekids.org/sites/default/files/documents/ResearchReports/TV%20Tipovers%20Research%20Rpt.pdf | archive-date = 6 September 2015 | url-status = live }}</ref> A [[Cathode-ray tube|CRT-style]] television that falls on a child will, because of its weight, hit with the equivalent force of falling multiple stories from a building.<ref name="19980901_Pediatrics">{{cite journal | last1 = Bernard | first1 = Philip A. | last2 = Johnston | first2 = Carden | last3 = Curtis | first3 = Scott E. | last4 = King | first4 = William D. | title = Toppled television sets cause significant pediatric morbidity and mortality | journal = [[Pediatrics (journal)|Pediatrics]] | date = 1998-09-01 | volume = 102 | number = 3 | page = E32 | doi = 10.1542/peds.102.3.e32 | eissn = 1098-4275 | issn = 0031-4005 | oclc =  1761995 | pmid = 9724680 | doi-access = free | df = dmy-all }}</ref> Newer [[Flat-panel display|flat-screen]] televisions are "top-heavy and have narrow bases", which means that a small child can easily pull one over.<ref name=SafeKids>{{cite book | url = https://www.safekids.org/sites/default/files/documents/skw_home_fact_sheet_feb_2015.pdf | title = Home Safety Fact Sheet (2015) | date = February 2015 | publisher = SafeKids Worldwide | archive-url=https://web.archive.org/web/20150824000908/https://www.safekids.org/sites/default/files/documents/skw_home_fact_sheet_feb_2015.pdf | archive-date = 24 August 2015 | url-status = dead }}</ref> {{As of|2015}}, TV tip-overs were responsible for more than 10,000 injuries per year to children in the United States, at a cost of more than {{US$|8}}{{nbsp}}million per year (equivalent to {{US$|{{Inflation|US|8|2015|r=2}}}}{{nbsp}}million per year in {{Inflation/year|US}}) in [[Emergency medicine|emergency care]].<ref name=Ferguson2012 /><ref name=SafeKids />

A 2017 study in ''[[The Journal of Human Resources]]'' found that exposure to cable television reduced cognitive ability and high school graduation rates for boys. This effect was stronger for boys from more educated families. The article suggests a mechanism where light television entertainment crowds out more cognitively stimulating activities.<ref>{{Cite journal | doi=10.3368/jhr.54.2.0316.7819R1| title=Television, Cognitive Ability, and High School Completion| date = 2019-03-01 | last1 = Hernæs | first1 = Øystein | last2 = Markussen | first2=Simen| last3=Røed| first3=Knut| journal = [[The Journal of Human Resources]] | volume = 54 | issue = 2 | pages = 371–400 | hdl=10419/130339| s2cid=4846339| url=https://econpapers.repec.org/RePEc:iza:izadps:dp9645| hdl-access=free | issn = 0022-166X | eissn = 1548-8004 | lccn = 66009974 | oclc = 1604126 | df = dmy-all}}</ref>

With high lead content in [[cathode-ray tube|CRTs]] and the rapid diffusion of new flat-panel display technologies, some of which ([[LCD]]s) use lamps which contain [[mercury (element)|mercury]], there is growing concern about [[electronic waste]] from discarded televisions. Related [[occupational health]] concerns exist, as well, for disassemblers removing copper wiring and other materials from CRTs. Further environmental concerns related to television design and use relate to the devices' increasing [[electrical energy]] requirements.<ref>{{cite web|url=http://www.energysavingtrust.org.uk/content/download/28169/337639/version/3/file/Riseofthemachines.pdf |publisher=Energy Saving Trust |title=The Rise of the Machines: A Review of Energy Using Products in the Home from the 1970s to Today |date=3 July 2006 |access-date=31 August 2007 |url-status=dead |archive-url=https://web.archive.org/web/20120828072528/http://www.energysavingtrust.org.uk/content/download/28169/337639/version/3/file/Riseofthemachines.pdf |archive-date=28 August 2012 }}</ref>

==See also==
{{portal|Television}}
{{div col|colwidth=22em}}
* [[B-television]]
* [[Broadcast-safe]]
* [[Broadcast television systems]]
* [[Content discovery platform]]
* [[Information-action ratio]]
* [[List of countries by number of television broadcast stations]]
* [[List of television manufacturers]]
* [[List of years in television]]
* [[Lists of television channels]]
* [[Media psychology]]
* [[MicroLED]]
* [[Sign language on television]]
* [[Telephilia]]
* [[Television studies]]
* [[Test card]]
* [[TV accessory]]
{{div col end}}

==References==
{{reflist}}

==Further reading==
* {{cite book |last=Abramson |first=Albert |title=The History of Television, 1942 to 2000 |publisher=McFarland |location=Jefferson, NC / London |year=2003 |isbn=978-0-7864-1220-4}}
* [[Pierre Bourdieu]], ''On Television'', The New Press, 2001.
* Tim Brooks and Earle March, ''The Complete Guide to Prime Time Network and Cable TV Shows'', 8th ed., Ballantine, 2002.
* [[Jacques Derrida]] and [[Bernard Stiegler]], ''Echographies of Television'', Polity Press, 2002.
* David E. Fisher and Marshall J. Fisher, ''Tube: the Invention of Television'', Counterpoint, Washington, D.C., 1996, {{ISBN|1-887178-17-1}}.
* [[Steven Berlin Johnson|Steven Johnson]], ''[[Everything Bad is Good for You: How Today's Popular Culture Is Actually Making Us Smarter]]'', New York, Riverhead (Penguin), 2005, 2006, {{ISBN|1-59448-194-6}}.
* {{cite news |last=Leggett |first=Julian |url=https://books.google.com/books?id=CdoDAAAAMBAJ&pg=PA497 |title=Television in Color |work=[[Popular Mechanics]] |location=Chicago |date=April 1941 |access-date=7 December 2014}}
* [[Jerry Mander]], ''Four Arguments for the Elimination of Television'', Perennial, 1978.
* Jerry Mander, ''In the Absence of the Sacred'', Sierra Club Books, 1992, {{ISBN|0-87156-509-9}}.
* [[Neil Postman]], ''[[Amusing Ourselves to Death]]: Public Discourse in the Age of Show Business'', New York, Penguin US, 1985, {{ISBN|0-670-80454-1}}.
* Evan I. Schwartz, ''The Last Lone Inventor: A Tale of Genius, Deceit, and the Birth of Television'', New York, Harper Paperbacks, 2003, {{ISBN|0-06-093559-6}}.
* Beretta E. Smith-Shomade, ''Shaded Lives: African-American Women and Television'', Rutgers University Press, 2002.
* Alan Taylor, ''We, the Media: Pedagogic Intrusions into US Mainstream Film and Television News Broadcasting Rhetoric'', Peter Lang, 2005, {{ISBN|3-631-51852-8}}.
* [[Amanda D. Lotz]], ''The Television Will Be Revolutionized'', New York University Press, {{ISBN|978-0-8147-5220-3}}

==External links==
{{Sister project links|s=Portal:Television}}
{{Library resources box
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|others=no
|about=yes
|label=Television}}

{{Lists of TV programs by country}}
{{Home appliances}}
{{Broadcasting}}
{{Video formats}}
{{Telecommunications}}
{{Media culture}}
{{Standard test item}}
{{Electronic systems}}

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