Editing Gamma correction (section)

===Analog TV===
Output to CRT-based television receivers and monitors does not usually require further gamma correction. The standard video signals that are transmitted or stored in image files incorporate gamma compression matching the gamma expansion of the CRT (although it is not the exact inverse). 
For television signals, gamma values are fixed and defined by the analog video standards. [[CCIR System M]] and [[CCIR System N|N]], associated with [[NTSC]] color, use gamma 2.2;  systems [[CCIR System B|B]]/[[CCIR System G|G]], [[CCIR System H|H]], [[CCIR System I|I]], [[CCIR System D|D]]/[[CCIR System K|K]], [[CCIR System K1|K1]], [[CCIR System L|L]] and M associated with [[PAL]] or [[SECAM]] color use gamma 2.8.<ref>{{cite book|url=https://search.itu.int/history/HistoryDigitalCollectionDocLibrary/4.283.43.en.1030.pdf|title=Reports of the CCIR, 1990: Also Decisions : XVIIth Plenary Assembly, Dusseldorf|year=1990|publisher=International Radio Consultative Committee|section=11A: Characteristics of systems for monochrome and color television}}</ref><ref name=":0">{{Cite book |url=https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.470-6-199811-S!!PDF-E.pdf#page=9 |title=Rec. ITU-R BT.470-6 - CONVENTIONAL TELEVISION SYSTEMS |publisher=ITU-R |year=1998 |pages=9}}</ref>