Editing Color television (section)

====Mexico====
[[Guillermo González Camarena]] independently invented and developed a field-sequential tricolor disk system in Mexico in the late 1930s, for which he requested a patent in Mexico on 19 August 1940, and in the United States in 1941.<ref name="US2296019">
{{cite web
 |author       = González Camarena, Guillermo
 |title        = Chromoscopic adapter for television equipment
 |url          = https://patents.google.com/patent/US2296019
 |work         = Patent No. US 2,296,019
 |version      = filed in Mexico 19 August 1940, filed in US 1941, patented 1942
 |publisher    = United States Patent Office
 |access-date  = 22 April 2017
|url-status   = live
 |archive-url  = https://web.archive.org/web/20170425205657/https://www.google.com/patents/US2296019
 |archive-date = 25 April 2017
|df           = mdy-all
}}</ref> González Camarena produced his color television system in his Gon-Cam laboratory for the Mexican market and exported it to the Columbia College of Chicago, which regarded it as the best system in the world.<ref name="Newcomb">
{{cite book
 | title = Encyclopedia of Television, second edition
 | author = Newcomb, Horace
 | volume = 1 A-C
 | publisher = Fitzroy Dearborn
 | year = 2004
 | isbn = 1-57958-411-X
 | page = 1484
 | url = https://books.google.com/books?id=JUzIAgAAQBAJ&q=gon-cam+columbia+gonzalez+camarena
 }}</ref><ref name="Gon-Cam1">
{{cite journal
 | url = https://books.google.com/books?id=RPIVAQAAMAAJ&q=gon-cam+columbia
 | title = Historia de la televisión en México
 | publisher = Sociedad Mexicana de Geografía y Estadística
 | journal = Boletín de la Sociedad Mexicana de Geografía y Estadística
 | volume = 97-99
 | date = 1964
 | page = 287
}}</ref> Goldmark had actually applied for a patent for the same field-sequential tricolor system in the US on 7 September 1940,<ref name="Goldmark1"/> while González Camarena had made his Mexican filing 19 days before, on 19 August.

On 31 August 1946, González Camarena sent his first color transmission from his lab in the offices of the Mexican League of Radio Experiments at Lucerna St. No. 1, in [[Mexico City]]. The video signal was transmitted at a frequency of 115&nbsp;MHz and the audio in the 40-metre band. He obtained authorization to make the first publicly announced color broadcast in Mexico, on 8 February 1963, of the program ''Paraíso Infantil'' on Mexico City's [[XHGC-TV]], using the NTSC system that had by now been adopted as the standard for color programming.

González Camarena also invented the "simplified Mexican color TV system" as a much simpler and cheaper alternative to the NTSC system.<ref name="Simplified-Mexican">
{{cite journal
 | url = http://www.americanradiohistory.com/Archive-Electronics-World/60s/1964/Electronics-World-1964-07.pdf
 | title = Simplified Mexican Color TV
 | author = Leslie Solomon
 | journal = Electronics World
 | volume = 72
 | number = 1
 | date = July 1964
 | page = 48 and 71
}}</ref> Due to its simplicity, NASA used a modified version of the system in its Voyager mission of 1979, to take pictures and video of Jupiter.<ref>^ *Enrique Krauze – Guillermo Gonzalez-Camarena Jr. "50 años de la televisión mexicana" (50th anniversary of Mexican TV) – 1999 Mexican TV documentary produced by Editorial Clío & Televisa, broadcast in 2000</ref>