Editing Advanced Video Coding (section)

=== Versions ===
Versions of the H.264/AVC standard include the following completed revisions, corrigenda, and amendments (dates are final approval dates in ITU-T, while final "International Standard" approval dates in ISO/IEC are somewhat different and slightly later in most cases). Each version represents changes relative to the next lower version that is integrated into the text.

* Version 1 (Edition 1): (May 30, 2003) First approved version of H.264/AVC containing Baseline, Main, and Extended profiles.<ref name=AVCV1March2003ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (05/2003) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=6312 |date=2003-05-30 |access-date=2013-04-18}}</ref>
* Version 2 (Edition 1.1): (May 7, 2004) Corrigendum containing various minor corrections.<ref name=AVCV1CorMay2004ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (05/2003) Cor. 1 (05/2004) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=7255 |date=2004-05-07 |access-date=2013-04-18}}</ref>
* Version 3 (Edition 2): (March 1, 2005) Major addition containing the first amendment, establishing the Fidelity Range Extensions (FRExt). This version added the High, High 10, High 4:2:2, and High 4:4:4 profiles.<ref name=AVCV2March2005ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (03/2005) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=7825 |date=2005-03-01 |access-date=2013-04-18}}</ref> After a few years, the High profile became the most commonly used profile of the standard.
* Version 4 (Edition 2.1): (September 13, 2005) Corrigendum containing various minor corrections and adding three aspect ratio indicators.<ref name=AVCV2September2005ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (2005) Cor. 1 (09/2005) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=8572 |date=2005-09-13 |access-date=2013-04-18}}</ref>
* Version 5 (Edition 2.2): (June 13, 2006) Amendment consisting of removal of prior High 4:4:4 profile (processed as a corrigendum in ISO/IEC).<ref name=AVCV2June2006ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (2005) Amd. 1 (06/2006) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=8811 |date=2006-06-13 |access-date=2013-04-18}}</ref>
* Version 6 (Edition 2.2): (June 13, 2006) Amendment consisting of minor extensions like extended-gamut color space support (bundled with above-mentioned aspect ratio indicators in ISO/IEC).<ref name=AVCV2June2006ITURecommendations/>
* Version 7 (Edition 2.3): (April 6, 2007) Amendment containing the addition of the High 4:4:4 Predictive profile and four Intra-only profiles (High 10 Intra, High 4:2:2 Intra, High 4:4:4 Intra, and CAVLC 4:4:4 Intra).<ref name=AVCV2April2007ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (2005) Amd. 2 (04/2007) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=9036 |date=2007-04-06 |access-date=2013-04-18}}</ref>
* Version 8 (Edition 3): (November 22, 2007) Major addition to H.264/AVC containing the amendment for [[Scalable Video Coding]] (SVC) containing Scalable Baseline, Scalable High, and Scalable High Intra profiles.<ref name=AVCV3November2007ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (11/2007) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=9226 |date=2007-11-22 |access-date=2013-04-18}}</ref>
* Version 9 (Edition 3.1): (January 13, 2009) Corrigendum containing minor corrections.<ref name=AVCV3January2009ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (2007) Cor. 1 (01/2009) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=9519 |date=2009-01-13 |access-date=2013-04-18}}</ref>
* Version 10 (Edition 4): (March 16, 2009) Amendment containing definition of a new profile (the Constrained Baseline profile) with only the common subset of capabilities supported in various previously specified profiles.<ref name=AVCV4March2009ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (03/2009) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=9710 |date=2009-03-16 |access-date=2013-04-18}}</ref>
* Version 11 (Edition 4): (March 16, 2009) Major addition to H.264/AVC containing the amendment for [[Multiview Video Coding]] (MVC) extension, including the Multiview High profile.<ref name=AVCV4March2009ITURecommendations/>
* Version 12 (Edition 5): (March 9, 2010) Amendment containing definition of a new MVC profile (the Stereo High profile) for two-view video coding with support of interlaced coding tools and specifying an additional supplemental enhancement information (SEI) message termed the frame packing arrangement SEI message.<ref name=AVCV5March2010ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (03/2010) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=10635 |date=2010-03-09 |access-date=2013-04-18}}</ref>
* Version 13 (Edition 5): (March 9, 2010) Corrigendum containing minor corrections.<ref name=AVCV5March2010ITURecommendations/>
* Version 14 (Edition 6): (June 29, 2011) Amendment specifying a new level (Level 5.2) supporting higher processing rates in terms of maximum macroblocks per second, and a new profile (the Progressive High profile) supporting only the frame coding tools of the previously specified High profile.<ref name=AVCV6June2011ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (06/2011) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=11293 |date=2011-06-29 |access-date=2013-04-18}}</ref>
* Version 15 (Edition 6): (June 29, 2011) Corrigendum containing minor corrections.<ref name=AVCV6June2011ITURecommendations/>
* Version 16 (Edition 7): (January 13, 2012) Amendment containing definition of three new profiles intended primarily for real-time communication applications: the Constrained High, Scalable Constrained Baseline, and Scalable Constrained High profiles.<ref name=AVCV7January2012ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (01/2012) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=11466 |date=2012-01-13 |access-date=2013-04-18}}</ref>
* Version 17 (Edition 8): (April 13, 2013) Amendment with additional SEI message indicators.<ref name=AVC8June2013ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (04/2013) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=11830 |date=2013-06-12 |access-date=2013-06-16}}</ref>
* Version 18 (Edition 8): (April 13, 2013) Amendment to specify the coding of depth map data for 3D stereoscopic video, including a Multiview Depth High profile.<ref name=AVC8June2013ITURecommendations/>
* Version 19 (Edition 8): (April 13, 2013) Corrigendum to correct an error in the sub-bitstream extraction process for multiview video.<ref name=AVC8June2013ITURecommendations/>
* Version 20 (Edition 8): (April 13, 2013) Amendment to specify additional [[color space]] identifiers (including support of [[Rec. 2020|ITU-R Recommendation BT.2020]] for [[Ultra-high-definition television|UHDTV]]) and an additional model type in the tone mapping information SEI message.<ref name=AVC8June2013ITURecommendations/>
* Version 21 (Edition 9): (February 13, 2014) Amendment to specify the Enhanced Multiview Depth High profile.<ref name=AVC9February2014ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (02/2014) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12063 |date=2014-11-28 |access-date=2016-02-28}}</ref>
* Version 22 (Edition 9): (February 13, 2014) Amendment to specify the multi-resolution frame compatible (MFC) enhancement for 3D stereoscopic video, the MFC High profile, and minor corrections.<ref name=AVC9February2014ITURecommendations/>
* Version 23 (Edition 10): (February 13, 2016) Amendment to specify MFC stereoscopic video with depth maps, the MFC Depth High profile, the mastering display color volume SEI message, and additional color-related VUI codepoint identifiers.<ref name=AVC13February2016ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (02/2016) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12641 |date=2016-02-13 |access-date=2017-06-14}}</ref>
* Version 24 (Edition 11): (October 14, 2016) Amendment to specify additional levels of decoder capability supporting larger picture sizes (Levels 6, 6.1, and 6.2), the green metadata SEI message, the alternative depth information SEI message, and additional color-related VUI codepoint identifiers.<ref name=AVC14October2016ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (10/2016) |publisher=ITU |url=http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12904 |date=2016-10-14 |access-date=2017-06-14}}</ref>
* Version 25 (Edition 12): (April 13, 2017) Amendment to specify the Progressive High 10 profile, [[hybrid log–gamma]] (HLG), and additional color-related VUI code points and SEI messages.<ref name=AVC13April2017ITURecommendations>{{cite news |title=ITU-T Recommendation H.264 (04/2017) |publisher=ITU |url=https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=13189 |date=2017-04-13 |access-date=2017-06-14 |at=See Tables A-1, A-6 and A-7 for the tabulated level-dependent capabilities.}}</ref>
* Version 26 (Edition 13): (June 13, 2019) Amendment to specify additional SEI messages for ambient viewing environment, content light level information, content color volume, equirectangular projection, cubemap projection, sphere rotation, region-wise packing, omnidirectional viewport, SEI manifest, and SEI prefix.<ref>{{Cite web|date=June 13, 2019|title=H.264: Advanced video coding for generic audiovisual services - Version 26 (Edition 13)|url=https://handle.itu.int/11.1002/1000/13903|url-status=live|archive-url=https://web.archive.org/web/20211104102930/https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=13903&lang=en|archive-date=2021-11-04|access-date=2021-11-03|website=www.itu.int}}</ref>
*Version 27 (Edition 14): (August 22, 2021) Amendment to specify additional SEI messages for annotated regions and shutter interval information, and miscellaneous minor corrections and clarifications.<ref>{{Cite web|date=August 22, 2021|title=H.264: Advanced video coding for generic audiovisual services - Version 27 (Edition 14)|url=https://handle.itu.int/11.1002/1000/14659|url-status=live|archive-url=https://web.archive.org/web/20211104103832/https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=14659&lang=en|archive-date=2021-11-04|access-date=2021-11-03|website=www.itu.int}}</ref>
*Version 28 (Edition 15): (August 13, 2024) Amendment to specify additional SEI messages for neural-network postfilter characteristics, neural-network post-filter activation, and phase indication, additional colour type identifiers, and miscellaneous minor corrections and clarifications.<ref>{{Cite web|date=August 13, 2024|title=H.264: Advanced video coding for generic audiovisual services - Version 28 (Edition 15)|url=https://handle.itu.int/11.1002/1000/15935|access-date=2025-02-12|website=www.itu.int}}</ref>