Talk:History of television

message: This article covers from the early days of television to the 60s and 70s. Why is modern television history not included? Items such as ATSC (over-the-air ditigal broadcasts), HDTV and satellite television are all parts of television history that are not included. Any particular reason? EvilReborn 03:59, 24 November 2006 (UTC)
replies: text: I wrote much of the material from the 1920s to the 1950s, and I plead guilty. I have not read up on television developments past that period. Hopefully someone who has, can put some balance into this article. — Walloon 06:46, 24 November 2006 (UTC)
thread_title: Modern TV?

message: Removing paragraph:
:Of note, though RCA is largely credited with developing the first commercial color television in the United States, the invention was actually first patented by University of Southern California (USC) physics professor Willard Geer in 1944. One month after he patented this invention RCA also filed for a patent, then sued Mr. Geer. Willard Geer eventually won the suit and was paid $15,000 by RCA.
But RCA is not "largely credited with developing the first commercial color television" in the U.S. Color television had been demonstrated as far back as 1928 by John Logie Baird. The first commercial color television system was by CBS, approved by the FCC in 1950, on the air in 1951, with the first CBS brand sets manufactured in 1951. The NTSC system, with hardware developed by RCA, was not approved until 1953, and the first RCA brand sets were manufactured in 1954, several months after Westinghouse had color sets on the market. — Walloon 00:09, 19 May 2006 (UTC)
thread_title: Willard Geer

message: Guillermo González Camarena filed his first color television patent in Mexico, for a field sequential color adaptor, on August 19, 1940. Peter Goldmark, chief engineer for CBS television development, first demonstrated his field sequential color system at the CBS Laboratory in June 1940 to CBS management on a 3-inch screen enhanced with a magnifier placed in front of the screen. CBS first broadcast its field sequential color system as early as August 28, 1940, and demonstrated it for a delegation of FCC Commissioners and engineers on September 4, 1940. Article by Robert B. Cooper.
And let's not forget that John Logie Baird had already displayed color television in 1928, and Bell Labs had demonstrated it in 1929. Baird gave another demonstration of color television, this time using a cathode ray tube and a revolving disk of colored filters, in 1939 — essentially what González Camarena offered in his 1940 patent.
Also, the patent (note spelling, not "pattent") number 2,296,022 listed for González Camarena's 1940 invention in an earlier version of this article is actually for a "monogram attachment" by inventor M. Chernow, filed in 1939. The correct patent number for González Camarena is 2,296,019. 
González Camarena is written about in the "Mexico" subsection of the History of Color Television section. — Walloon 09:18, 8 June 2006 (UTC)
thread_title: González Camarena

message: The sentence "At first, terrestrial broadcasting was the only way television could be distributed. Because bandwidth was limited, government regulation was normal." is unclear. High frequency radio relays were used (something like microwave?) very early for remotes and for feeding broadcasts to nearby cities. The article implies that, say, Philadelphia would pick up a New York broadcast from their regular broadcast frequency and repeat it to their viewers, which I do not believe to be the case. The second sentence does not seem to follow from the first.
The book "The Future of Television" by Orrin E. Dunlap, New York: Harper, 1942 says (p8) that coax was installed between New York and Philadelphia by that date for TV relays, and that high frequency radio relays were in the works. NBC had used such a radio link to send pictures from Camp Upton.L.I. to NYC 68 miles with 2 repeaters. Edison 14:18, 12 July 2006 (UTC)
thread_title: Broadcast television: relay

message: I have removed the following paragraph:
:The first-ever sports broadcast on television took place on May 17, 1939 at the second game of a double-header between the Columbia University Columbia Lions and the Princeton University Tigers football teams at Columbia's Baker Field in upper Manhattan. NBC wanted to experiment with using television to broadcast live sporting events. The test was so successful that they soon began broadcasting major league sports.
England's BBC had been broadcasting sports events for several years before this, and Germany televised the 1936 Summer Olympics. — Walloon 01:06, 22 November 2006 (UTC)
replies: text: The two men who told me this are now dead, so I have no reference.  According to the late Ellery Tuller, K8CVO, early video broadcasts of major league baseball games were first married to AM play-by-play by amateur radio operators.  Of course us hams like to take credit for any development in technology.--W8IMP 06:45, 14 April 2007 (UTC)
thread_title: First sports broadcast

message: What about the Telephane invented by the Australian Henry Sutton in 1885 . Ozdaren 15:16, 18 June 2007 (UTC)
replies: text: Sutton's invention was published but never demonstrated. On the transmission side it was really no different from Nipkow's proposal. On the receiver side, its innovation was to use a Kerr cell (a small glass cell holding a drop of carbon bisulphide) as the optical medium stimulated by electrodes. Baird in the 1920s and others experimented with Kerr cells, but the illumination was always insufficient. — Walloon (talk) 16:29, 5 June 2008 (UTC)
thread_title:  Telephane 

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thread_title: Fair use rationale for Image:Old tv.jpg

message: Could information from this article from the 1907-02-24 edition of The New York Times be incorporated? It seems to contain one of the first mentions of the concept of 'television':
The new 'telephotograph' invention of Dr. Arthur Korn, Professor of Physics in Munich University, is a distinct step nearer the realization of all this, and he assures us that 'television,' or seeing by telegraph, is merely a question of a year or two with certain improvements in apparatus.
Thanks. --the Wild Falcon (talk | log) 13:48, 20 September 2007 (UTC)
replies: text: Actually, the concept of television, if not by name, had been written about since the 1880s. Per your suggestion, I have linked the New York Times article on Dr. Korn to the existing text about photo telegraphy in 1907 (which was referring to his demonstration). — Walloon 16:57, 20 September 2007 (UTC)
thread_title:  Telephotograph 

message: :The first to create a working prototype of the cathode ray tube based, fully electronic television receiver was Kenjiro Takayanagi, a Japanese inventor, who successfully demonstrated the device at Hamamatsu Industrial High School on Christmas, 1926. This was the world's first example of the all-electronic model of the television; the basic architecture still used in present day (pre LCD) television.
I have removed the paragraph above from the article because it is incorrect. According to the Web site The Evolution of TV: A Brief History of TV Technology in Japan,
:Takayanagi constructed a system that utilized a mechanical Nipkow disk and a photoelectric tube in the transmitting device, and an electric Braun tube in the receiving device. He succeeded in displaying a clear image of the character “[Japanese character]” on a Braun tube on December 25, 1926 (on a mechanical and electrical system with 40 scanning lines).
In order words, he demonstrated in 1926 what Boris Rosing and his student Vladimir Zworykin had achieved in Russia in 1911, also using a Braun tube. See the section in this Wikipedia article on mechanical television. — Walloon (talk) 15:36, 24 January 2008 (UTC)
thread_title: Kenjiro Takayanagi

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thread_title: Fair use rationale for Image:Peacock NBC presentation in RCA color.JPG

message: I have removed the following three paragraphs from the section on electronic color television:
:In 1905 in the laboratory of Berlin Univerisity Professor Arthur Korn, a student of the same University Hovhannes Adamyan made his first invention, when he improved the device constructed by his teacher and gave a transmittable picture. In 1908 the Kaiser's License Office of Berlin issued a license to Adamyan "For creating a device for transmission of a picture or several pictures through electricity". For the first time in history of television development Adamyan substantiated the idea of transmitting a black-and-white picture to the scientific world. The license was followed by testing of the two-color TV in Berlin, the first experience ever in transmitting of the color picture.
:Adamyan has been acknowledged as the inventor of the color television. The scientist received French and Russian licenses for his invention in 1908. In 1921, during the all-Russian Electro technical Conference in Moscow, he presented the results of his studies for transmitting a picture on long distances. In a letter addressed to his sister, Adamyan wrote: "Although I am invited to Germany, I wish to make my first large scientific experiment in my Motherland". In 1925 Adamyan presented the first scheme of the color television sequential system at the Yerevan State University, the tri-color television, which was named "Herates" (the far-sighted). Adamyan's invention was applied three years later in London. In 1930-ies Adamyan was also acknowledged as the inventor of the prototype of the modern video player.
:In 1945-1951 US Columbia (CBS) Radio company tested Adamyan's invention and only in 1953 it was accepted, and later replaced by NTSC system.
Adamyan's name does not appear in Television: An International History edited by Anthony Smith, Television: An International History of the Formative Years by R.W. Burns, or The History of Television, 1880 to 1941 by Albert Abramson. His name appears on the Web only on Armenian-oriented sites. — Walloon (talk) 05:52, 5 June 2008 (UTC)
thread_title:  Hovhannes Adamyan 

message: "Meanwhile in North America the original NTSC 525-line standard from 1941 was retained, although analog television will be totally replaced for broadcast purposes in February 2009."
I think this needs to be clarified (although I could be wrong).  As the sentence begins with "North America," it implies that all of North America will be switching to digital broadcasting as of 2009.  This is not true, as Canada will not be switching until 2011.  
Ice crazi wow (talk) 01:34, 31 December 2008 (UTC)
thread_title:  Television Sets  

message: Can't be much of a History of Television if it doesn't even mention the media that made re-runs possible! (Doesn't even LINK to either subject on this date...) Twang (talk) 07:51, 17 January 2009 (UTC)
replies: text: Please add the missing content at your disgression. (I have enough grief with changes to existing content and warding off the vandals.) Cheers!, Rico402 (talk) 12:59, 17 January 2009 (UTC)
thread_title: Kinescope? Videotape?

message: Hungarian Peter Carl Goldmark () (December 2, 1906 – December 7, 1977) had gotten his first exposure to television in 1926 while in graduate school in Vienna. He later hoped to work with John Logie Baird but was turned down for a job after meeting Baird for lunch in London.  In 1936, Goldmark joined CBS Laboratories, and one year later he became a naturalized citizen of the United States. Goldmark developed a technology for color television while at CBS. The system, first demonstrated on August 29, 1940, and shown to the press on September 3rd  Current Broadcasting 1940  used a rapidly rotating color wheel that alternated transmission in red, green and blue.  The system transmitted on 343 lines, about 100 less than a black and white set, and thus was incompatible with most television sets currently on the market.Color Television System Development - CBS System. 
Although CBS did broadcast in color with the Goldmark system in 1951, the "compatible color" technology developed for RCA and NBC (by a team led by Richard Kell, George H. Brown and others) was compatible with existing black and white TVs. Goldmark and others have pointed out that the CBS color wheel system did provide better picture quality than RCA's system, but the compatibility problem proved its downfall. As a result, the RCA/NBC color system became the industry standard chosen by the FCC in 1953. (Ironically, cameras using the color wheel system continued to be used for scientific research for several more decades, including at least one of the 1970s NASA moon landings.)
Goldmark spent the next two decades at CBS Laboratories working on various inventions, chief of which was EVR, the Electronic Video Recorder. This futuristic home video playback device used reels of film stored in plastic cassettes to electronically store audio and video signals, and was first announced in 1967. A B&W prototype was demonstrated in 1969 (promising color playback in future models), but the invention floundered when it proved to be difficult and costly to manufacture. CBS was also concerned about the potential of competition from home video devices, particularly those that could record -- a fear that eventually proved prescient. As with color television, Goldmark's EVR film-based system was superseded by other technology, in this case Sony's U-Matic 3/4" videocassette format in late 1971, since the cassette tape format was cheaper and more effective.
On November 22, 1977, President Jimmy Carter presented Goldmark with the National Medal of Science "For contributions to the development of the communication sciences for education, entertainment, culture and human service."US NSF - The President's National Medal of Science: Recipient Details
Sources:
* Coleman, Mark (2005) PLAYBACK: From the Victrola to MP3, 100 Years of Music, Machines and Money, Published by Da Capo Press ()
*Fisher and Fisher, "The Color War", Invention and Technology, Winter 1997
* Goldmark, Peter (1973) "Maverick Inventor: My Turbulent Years at CBS", published by Saturday Review Press ()
* Reitan, Jr., Edward Howrd, "Ed Reitan's Color Television History," http://novia.net/~ereitan/, retrieved July 1, 2007.
— 94.44.4.116 (talk) 13:35, 23 January 2009 (UTC)
replies: text: You're conflating two different RCA color television systems. The RCA color system presented to the FCC in 1949-1950 was inferior to the CBS system in many ways (although the CBS system had lower resolution). The RCA color system presented to the FCC in 1953, and made the national color broadcasting standard that December, was by all accounts superior to the CBS system and the previous RCA system. — Walloon (talk) 23:38, 23 January 2009 (UTC)
thread_title: Peter Carl Goldmark

message: I've reverted the "Electronic television" section back to my edit of 15 May 2009. There was no deletion of facts or other important relevant material in this edit; it mostly comprised corrections/adjustments for style and accuracy. Only the following was deleted:
:"The "principle of storage" is the basis of modern Television system. His [Tihanyi's] patents operated perfectly on the same method as the latter mass produced Television systems."
Fully modern television systems don't exploit Tihanyi's "principle of storage" because they employ charge-coupled devices (CCDs) rather than a camera tube such as the orthicon or its  forerunner the iconoscope. Granted CCDs are image storage devices, but there are considerable differences compared to Tihanyi's camera tube. But moreover, no single innovation or component is "the basis of modern Television". (You could make a better argument that "digital technology" is "the basis of modern Television", since the "state of the art" in TV is a "fully digital" system.)
The second sentence is simply redundant and poorly written; Tihanyi's contributions are amply covered in the article as is, including the importance of "charge storage" to the design of the iconoscope.
Cheers, Rico402 (talk) 15:09, 17 May 2009 (UTC)
thread_title:  Editing "Electronic television" 

message: "The concept of breaking a single video frame into interlaced 'fields' was first demonstrated by Russian inventor Léon Theremin in 1927"
(Albert Glinsky: Theramin, University of Illinois Press, 2000)
First of all, I do not doubt that Theremin invented his electronic instrument "Theramin" and other things in the 1920s. These are proven facts.
But with all respect, I very much doubt this whole Theremin / television inventor / interlaced inventor stuff. This sounds like one of those classic Russian/Soviet falsifications to me.
The whole story is just based on a single source, which is the book mentioned above - published in 2000. The other source would be Theremin's own few lines about this issue in the book "A.F. Joffe - Memories [my own translation], Academy of Sciences Press [again my own translation], Moscow, 1973", offering a phantastic story how he invented television devices with a few lines up to 62 and even 120 lines (incorporating interlaced 'lines' technique) within 2 or 3 (!) years (from 1924 or 1925 to 1927) as part of his academic thesis!
Moreover, he was travelling a lot during that period to present his 'Theramin', to negotiate lincence issues for his 'Theramin', etc. His alleged development of television of course had to be temporary halted during his extensive travels in 1925/26.
He also claims to have invented in 1927 a portable(!) camera or whole television system with 100 lines, which could operate outdoor and under daylight conditions! (Meaning without any additional light source - in 1927!!!)
Should these claims be true, Theremin would have been ways ahead of all other television pioneers.
I think - and 'early television buffs' would agree - about one decade ahead wouldn't be exaggerated in this case. The story of early television would have to be rewritten.
The stupid thing, now, about all of these phantastic 'achievements' regarding television devices is that there is not a single proof for not even one of these claims.
No photos, no patent files, no drawings, no working schemes, no technical descriptions, nothing detailed and nothing general, no presentations (he travelled a lot and had his own laboratory in the US during the early 1930s), no contemporary articles.
Absolutely nothing. Zero.
However, Theremin himself claims that there had been an article in the magazine Ogonyok [my own translation] in the 1920s. But even if that would be true, it wouldn't change anything about the non-existing proofs: Theremin maybe indeed has written a (theoretic) thesis about television and maybe did some research. But if one remembers the tons of propaganda, which had been put out especially by the early Soviet Union, to show how 'progressive' and 'modern' the largely backwards country was, it is not unlikely that Ogonyok somehow 'sexed up' its article a little bit.
There is some literature about Theremin from (communist) East Germany, a soviet puppet state, which glorified everything Soviet/Russian. Theremin had been a big celebrity in East Germany due to his various achievements. But in none of this literature I could discover anything new about his alleged achievements in the field of television. If at all, it's always the same few statements, which I tried to give above in my own words.
So I have good reason to assume that this whole 'Theremin-television story' is nothing more than a huge fake!
I can only hope that it's only Russian chauvinists that spread such allegations via the 'University of Illinois Press' and all over corresponding Wikipedia articles.
I for my part will erase those non-proven statements about Theremin and television.
Greets.  —Preceding unsigned comment added by 84.157.75.28 (talk) 19:52, 5 August 2009 (UTC)
thread_title:  Leon Theremin and television? 

message: An article called "history of television" (this one is actually about TV technology, so needs re-naming) needs to cover the different broadcast formats: local, network, live, film, kinescope, videotape and recording. Tape changed everything, and the early era, before it, depended on kinescopes (many lost).This article does not even mention those essential technologies by name, nor the effect they had on the medium. Twang (talk) 00:25, 24 October 2010 (UTC)
replies: text: I agree with Twang:  this article should be re-named.  In addition, Wikipedia needs a separate but linked article on the History of television programming.Kdammers (talk) 05:24, 23 July 2014 (UTC)
thread_title:  Broadcast formats, technologies entirely missing 

message: I think it is probably true that at least in the US, the black and white TV has mostly disappeared from the market sometime in the 1980's, but in what year?. I would like to see additional information on this with cited sources.Smiloid (talk) 03:28, 14 December 2010 (UTC)
thread_title: B&W sets, In what year did they disappear?

message: I see that when I typed in that television viewers were originally not called "viewers" but "lookers on" or "lookers in", some one deleted it and gave the edit summary  - "Undid potentially interesting, but unsourced addition by ACEOREVIVED". The first thing I would like to say is I thank the person for being so well-mannered with his or her edit summary  - it is not often that when things are deleted due to being unsourced on Wikipedia, one gets an edit summary with as much as courtesy as that! The source where I heard this information was that "Today" programme on BBC Radio Four, on All Soul's Day 2011. There was a lot about the history of television that day because it was then that it was 75 years to the start of television broadcasting in the United Kingdom. If one goes to the website of "Today" for November 2 2011, one might be able to do a podcast of this radio programme, where one could hear this information (I seem to recall that it was near the end of the programme). ACEOREVIVED (talk) 11:54, 3 November 2011 (UTC)
thread_title: Source of my information

message: So in modern times this is just video content. Article sort of trails off without any treatment of much in the last 20 years except the US broadcast conversion to digital. 76.180.168.166 (talk) 17:58, 17 February 2013 (UTC)
thread_title:  Wrap up 

message: The article states John Logi Bairds first color broadcast as being from Crystal Palace in 1938... I think they mean Alexandra Palace in north London... as the Crystal Palace burnt down in 1936Goonerdude (talk) 05:48, 20 February 2015 (UTC)
thread_title:  Crystal Palace 

message: The main article Television says 
"By 26 January 1926 he [Baird] demonstrated the transmission of the image of a face in motion by radio. This is widely regarded as the first television demonstration. The subject was Baird's business partner Oliver Hutchinson."
The History of Television article says
"By January 26, 1926 he demonstrated the transmission of an image of a face in motion by radio. This is widely regarded as the first television demonstration in history. The subject was Baird's business partner Daisy Elizabeth Gandy."
The image accompanying both entries looks vaguely male. Can someone who knows more than I do sort this?
Jperrylsu (talk) 00:29, 4 June 2015 (UTC)
thread_title:  Hutchinson or Gandy?

message: Is there any agreement on the "first" date for a public broadcasting system?  Is this the BBC in 1932 (Baird system), Germany in 1935 or the BBC in 1935?  There are contradictory claims of "first" circulating about both. Andy Dingley (talk) 10:28, 27 July 2015 (UTC)
thread_title:  First public broadcast? 

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thread_title:  External links modified 

message: This is just to confirm that Google's Doodle item today 26.1.16 on Logie Baird is seriously flawed historically and this has been passed onto various news agencies. The image shown in the video as the first broadcast of a person is not of Daisy Elizabeth Gandy, who was probably a secretary at the time, it is of Captain Oliver George Hutchinson (anyone can see it is a man with a bowtie) who was Logie Baird's business partner and financial backer. Both men had Soap Businesses in the early twenties, Hutchinson's ver successful and Baird's not, the idea of developing the television was put to Oliver who decided to back Logie.
Oliver Hutchinson was my great Uncle and I have done a fair amount of research on this. They both first met at Argyll Motor Works in Strathclyde as engineers and my Father recounted the tail of the partnership being set up in the Ivy Restaurant in Covent Garden.— Preceding unsigned comment added by Marcusleith (talk • contribs) 
: Your assertion, while perhaps correct, is original research so it's useless here. You can claim to have done a lot of research and I can claim to have won the Nobel Prize 22 times. You are welcome to read next week's Signpost where the traffic report will address the fact that a bunch of people like you reacted to the Google Doodle per usual. No one will likely comment about this supposed error as you've brought no reliable sources to bolster your claims. Chris Troutman (talk) 16:43, 26 January 2016 (UTC)
thread_title: Comment

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thread_title:  External links modified 

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thread_title:  External links modified 

message: The source used in the article for the claim that Theremin has invented interlacing can be found as a Google Book here: , and it makes no mention of Theremin having anything to do with interlacing at all, much less having invented it. Interestingly though, the pages 40-45 given here for this claim instead include the claim that he was the first to invent and demonstrate a working 100-line system, which this article still requests a source for. However, it should be noted in general that the book is pretty much written like a sensationalist novel and includes very few sources, if any, for its many claims. It reminds me terribly of The Hidden Hitler in this regard. --2003:71:4E16:4B83:4CBE:CCA1:12C7:4742 (talk) 04:40, 14 January 2018 (UTC)
thread_title:  Theremin 

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*Added archive https://web.archive.org/web/20140303133328/http://dmsiusa.com/glory-days.html to http://www.dmsiusa.com/glory-days.html
*Added archive https://web.archive.org/web/20071113101332/http://www.novia.net/~ereitan/ to http://novia.net/~ereitan/
*Added archive https://web.archive.org/web/20070929091705/http://www.researchchannel.org/prog/displayevent.aspx?rID=3431&fID=345 to http://www.researchchannel.org/prog/displayevent.aspx?rID=3431&fID=345
*Added archive https://web.archive.org/web/20141217032214/http://www.dishtvsignup.com/history-of-tv-infographic.pdf to http://www.dishtvsignup.com/history-of-tv-infographic.pdf
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
Cheers.—InternetArchiveBot (Report bug) 15:02, 19 January 2018 (UTC)
thread_title:  External links modified (January 2018) 

message: The present tense produces information which may be true when composed, but soon becomes false.  Take the statement, "There are no wrinkled cherries in existence."  In one week someone may invent wrinkled cherries.  Thus the statement should have been, "As of September 12, 20XX, there were not wrinkled cherries."  (Of course that statement is an unprovable negative, which is another problem in articles (has someone checked out the land in all the world?)  Article says,
:The transition is expected to be completed worldwide by mid to late 2010s."
Now as of 2018, that statement is nonsense.  It should have said something like,
:"As of August 21, 2008, the transition WAS expected to be . . . ."  (PeacePeace (talk) 15:35, 16 June 2018 (UTC)
thread_title:  Avoid the present tense in Wikipedia articles 

message: This article is getting long and ramble-y. The whole section "Terrestrial Television" is pretty much a recap of the history of TV, artificial satellites not being available in 1928. There is a dedicated article that could contain the country-by-country specific minutia, and the section here could be ruthlessly trimmed and turned into an overview. We might even explain why we call it "terrestrial" television - TV isn't being watched on other planets. --Wtshymanski (talk) 23:54, 12 June 2021 (UTC)
thread_title: Refactor June 2021

message: The first black & white television broadcasts in Australia commenced in Sydney in 1956.
The 1956 Melbourne Olympic Games were broadcast live, although until 1957, few people owned a receiver. Licenses were required to own a T. V. or radio receiver in the 1950's and 1960's.
 Australia, through the then Australian Broadcasting Commission, adopted the P.A.L. standard for television broadcasting.
Colour television was introduced in 1975, and receivers were initially costly. KG thinker 00:04, 1 January 2022 (UTC)
thread_title:  Television broadcasting in Australia 

message: the para on bissiri seems hastily written, but claims a 1917 transatlantic signal path. this conflicts with the later assertion that baird achieved this first in the 30s.
which is it?
duncanrmi (talk) 17:58, 26 May 2023 (UTC)
thread_title:  first transatlantic television signal 

message: Hi evoeryone !
According too international normalization, we have to be careful not to make confution between Broadcast television systems (systems), color video standards (as such as NTSC, PAL, SECAM...) and other video formats (525 lines, 625 lines, 819 line, HDTV...).
Have all a nice day or evening. ;) Tisourcier (talk) 12:01, 12 December 2023 (UTC)
thread_title:  Systems, formats and standards 

message: In the 1920's the BBC were transmitting television images from the Crystal palace transmitter. It was a crude Baird system, but receivers were commercially available.
They also carried out experimental transmission in colour and 3D. 88.87.126.220 (talk) 13:34, 22 February 2024 (UTC)
thread_title:  BBC 1920's