Editing Broadcast television systems (section)

==== Notes by system ====
; [[CCIR System A|A]]: Early [[United Kingdom]] and [[Ireland]] VHF system (B&W only). First electronic TV system, introduced in 1936. Vestigial sideband filtering introduced in 1949. Discontinued on 23 November 1982 in Ireland and on 2 January 1985 in the UK.<ref>{{cite web |date=2012-02-12 |title=The UK 405-Line Television Network |url=http://www.pembers.freeserve.co.uk/405-Lines/index.html |access-date=2021-12-31 |website= |archive-url=https://web.archive.org/web/20120212100552/http://www.pembers.freeserve.co.uk/405-Lines/index.html |archive-date=12 February 2012 |url-status=dead}}</ref><ref name="auto">{{cite web |date=2012-03-06 |title=World Analogue Television Standards and Waveforms |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html |access-date=2021-12-31 |website= |archive-url=https://web.archive.org/web/20120306185600/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html |archive-date=6 March 2012 |url-status=dead}}</ref>
; [[CCIR System B|B]]: VHF-only in most Western European countries (combined with system G and H on UHF); VHF and UHF in [[Australia]]. Originally known as the Gerber standard.<ref>{{cite web |title=625-Line Television Broadcast Standards - UK Vintage Radio Repair and Restoration Discussion Forum |url=https://www.vintage-radio.net/forum/showthread.php?t=36027 |access-date=2021-12-31 |website=www.vintage-radio.net}}</ref>
; [[CCIR System C|C]]: Early VHF system; used only in [[Belgium]], [[Italy]], the [[Netherlands]] and [[Luxembourg]], as a compromise between Systems B and L. Discontinued in 1977.<ref name="auto"/>
; [[CCIR System D|D]]: The first 625-line system. Used on VHF only in most countries (combined with system K on UHF); VHF and UHF in [[China]].
; [[CCIR System E|E]]: Early [[France|French]] VHF system (B&W only); very good (near [[High-definition television|HDTV]]) picture quality but uneconomical use of bandwidth. Sound carrier separation +11.15&nbsp;MHz on odd numbered channels, -11.15&nbsp;MHz on even numbered channels. Discontinued in 1984 (France) and 1985 (Monaco).<ref>{{cite web |date=2012-08-30 |title=World Analogue Television Standards and Waveforms |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html |access-date=2021-12-31 |website= |archive-url=https://web.archive.org/web/20120830232230/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html |archive-date=30 August 2012 |url-status=dead}}</ref>
; [[CCIR System F|F]]: Early VHF system used only in Belgium and Luxembourg; allowed French 819-line [[Television show|television programming]] to be broadcast on the 7&nbsp;MHz VHF channels used in those countries, at a substantial cost in horizontal resolution. Discontinued in 1968 (Belgium) and 1971 (Luxembourg).<ref name="auto"/>
; [[CCIR System G|G]]: UHF only; used in countries with [[CCIR System B|System B]] on VHF, except Australia.
; [[CCIR System H|H]]: UHF only; used only in Belgium, Luxembourg and Netherlands. Similar to System G with a 1.25&nbsp;MHz vestigal sideband.
; [[CCIR System I|I]]: Used in the [[United Kingdom|UK]], [[Ireland]], [[Southern Africa]], [[Macau]], [[Hong Kong]] and [[Falkland Islands]].
; [[NTSC-J|J]]: Used in [[Japan]] (see system M below). Identical to system M except that a different black level of 0 [[IRE (unit)|IRE]] is used instead of 7.5 IRE. Although the ITU specified a frame rate of 30 fields, 29.97 was adopted with the introduction of NTSC color to minimize visual artifacts. Discontinued in 2012, when Japan transitioned to [[Digital television transition|digital]].
; [[CCIR System K|K]]: UHF only; used in countries with system D on VHF, except China, and identical to it in most respects.
; [[CCIR System K1|K1]]: Used only in [[Overseas France|French overseas departments and territories]].
; [[CCIR System L|L]]: Used only in [[France]]. On VHF Band 1 only, the audio is at −6.5&nbsp;MHz. Discontinued in 2011, when France transitioned to [[Digital television transition|digital]]. It was the last system to use positive video modulation and AM sound.
; [[CCIR System M|M]]: Used in most of the [[Americas]] and [[Caribbean]] (except [[Argentina]], [[Paraguay]], [[Uruguay]] and [[French Guiana]]), [[Myanmar]], [[South Korea]], [[Republic of China|Taiwan]], [[Philippines]] (all NTSC-M), [[Brazil]] ([[PAL-M]]), [[Vietnam]], [[Cambodia]] and [[Laos]] (SECAM-M). Although the ITU specified a frame rate of 30 fields, 29.97 was adopted with the introduction of NTSC color to minimize visual artifacts.
; [[CCIR System N|N]]: Adopted by [[Argentina]], [[Paraguay]] and [[Uruguay]] (all [[PAL#PAL-N|PAL-N]] since 1980).