Editing Standard-definition television (section)

{{Short description|Digital TV with similar definition to analog broadcasts}}
{{Use American English|date=September 2020}}
{{Redirect|SDTV|a television broadcasting network in Shandong Province|Shandong Television}}
{{Refimprove|date=June 2022}}

[[File:TV-line-count-world.svg|thumb|500px|right|SDTV resolution by nation: for historical reasons, different countries use either [[480i]] or [[576i]] as their standard-definition picture format]]

'''Standard-definition television''' ('''SDTV'''; also '''standard definition''' or '''SD''') is a television system that uses a resolution that is not considered to be either [[high-definition television|high]] or [[enhanced definition]].<ref name=":0">{{cite web |title=Standard definition television (SDTV) |url=https://www.atsc.org/atsc-glossary/standard-definition-television-sdtv/ |access-date=2023-06-18 |website=ATSC: NextGen TV |language=en-US}}</ref> ''Standard'' refers to offering a similar resolution to the [[broadcast television systems#ITU standards|analog broadcast systems]] used when it was introduced.<ref name=":0" /><ref>{{cite web |title=HDTV |url=http://www.siliconimaging.com/hdtv.htm |access-date=2023-06-18 |website=siliconimaging.com}}</ref>