NBC

===NBC HD===

NBC's master feed is transmitted in [[1080i]] [[high-definition television|high definition]], the native resolution format for NBCUniversal's television properties. However, 19 of its affiliates transmit the network's programming in [[720p]] HD, while four others carry the network feed in [[480i]] [[standard-definition television|standard definition]]<ref name=re/> either due to technical considerations for affiliates of other major networks that carry NBC programming on a digital subchannel or because a primary feed NBC affiliate has not yet upgraded their transmission equipment to allow content to be presented in HD.

NBC's master feed has not fully converted to [[1080p]] or [[2160p]] [[ultra-high-definition television]] (UHD). However, some NBC stations have already begun broadcasting at 1080p via [[ATSC 3.0]] multiplex stations. One notable example is [[WRAL-TV]] in [[Raleigh, North Carolina]] (a station that re-joined NBC in February 2016), which is currently also broadcasting at 1080p via [[WNGT-CD]], which is also serving as an ATSC 3.0 multiplex for the Raleigh area. While the equipment would allow the transmission of 2160p UHD, this was previously done through a secondary experimental station (WRAL-EX) where it transmitted limited NBC programming in UHD. The experimental station went off-air in 2018 as part of the FCC's repacking process.

''[[Meet the Press]]'' was the first regular series on a major television network to produce a high-definition broadcast on February 2, 1997, which aired in the format over [[WHD-TV]] in Washington, D.C., an experimental television station owned by a consortium of industry groups and stations which launched to allow testing of HD broadcasts and operated until 2002 (the program itself continued to be transmitted in [[480i]] [[standard-definition television|standard definition]] over the NBC network until May 2, 2010, when it became the last NBC News program to convert to HD).<ref>{{cite web|title='Meet the Press' goes hi-def: WHD-TV Washington airs country's first HDTV network program|url=http://www.highbeam.com/doc/1G1-19111524.html|archive-url=https://web.archive.org/web/20150924150234/http://www.highbeam.com/doc/1G1-19111524.html|url-status=dead|archive-date=September 24, 2015|first=Glen|last=Dickson|periodical=Broadcasting & Cable|date=February 10, 1997|access-date=July 18, 2015}}</ref><ref>{{cite web|title='Meet the Press' to Get New Set; Go HD|url=http://www.adweek.com/tvnewser/meet-the-press-to-get-new-set-go-hd/25899|first=Chris|last=Ariens|website=[[AdWeek|TVNewser]]|date=April 12, 2010|access-date=July 17, 2015|archive-date=July 21, 2015|archive-url=https://web.archive.org/web/20150721154625/http://www.adweek.com/tvnewser/meet-the-press-to-get-new-set-go-hd/25899|url-status=live}}</ref> NBC officially began its conversion to [[high-definition television|high definition]] with the launch of its simulcast feed, NBC HD, on April 26, 1999, when
''[[The Tonight Show]]'' became the first HD program to air on the NBC network as well as the first regularly scheduled American network program to be produced and transmitted in high definition. The network gradually converted much of its existing programming from [[standard-definition television|standard-definition]] to high definition beginning with the [[2002–03 United States network television schedule|2002–03 season]], with select shows among that season's slate of freshmen scripted series being broadcast in HD from their debuts.<ref name="HDTV">{{cite journal |author=W. A. Kelly Huff |year=2001 |title=Regulating the Future: Broadcasting Technology and Governmental Control |url=https://archive.org/details/regulatingfuture0000huff |journal=Contributions to the Study of Mass Media and Communications |publisher=[[Greenwood Publishing Group]] |page=[https://archive.org/details/regulatingfuture0000huff/page/172 172] |isbn=9780313000607 |issn=0732-4456 |url-access=registration |quote=The Tonight Show with Jay Leno 1999.}}</ref>

The network completed its conversion to high definition in September 2012, with the launch of NBC Kids, a new Saturday morning children's block programmed by new partial sister network [[Sprout (TV network)|PBS Kids Sprout]], which also became the second Saturday morning children's block with an entirely HD schedule (after the ABC-syndicated ''[[Litton's Weekend Adventure]]''). All the network's programming has been presented in full HD since then (except for certain [[Christmas holiday season|holiday]] specials produced prior to 2005 – such as its annual broadcast of ''It's a Wonderful Life'' – which continues to be presented in 4:3 SD, although some have been remastered for HD broadcast).

The network's high-definition programming is broadcast in [[5.1 surround sound]].