Whenever I searched about H.264
, there is plenty information about video-encoding, media-container so forth, but why I can not find any effective source to explain what is meaning of 26
in H.26{1,2,3,4,5}
?
Among other H.26x are H Series recommendations of ITU-T (ITU Telecommunication Standardization Sector), series on Audiovisual and multimedia systems.
H.261 Video codec for audiovisual services at p x 64 kbit/s
H.262 Information technology - Generic coding of moving pictures and associated audio information: Video
H.263 Video coding for low bit rate communication
H.Imp263 Implementors' Guide for ITU-T Recommendation H.263
H.264 Advanced video coding for generic audiovisual services
H.264.1 Conformance specification for ITU-T H.264 advanced video coding
H.264.2 Reference software for ITU-T H.264 advanced video coding
H.Imp264 Implementors' Guide for ITU-T Recommendation H.264
H.265 High efficiency video coding
H.265.1 Conformance specification for ITU-T H.265 high efficiency video coding
H.265.2 Reference software for ITU-T H.265 high efficiency video coding
However there are lot of others there so 26 alone does not have any special meaning.
ITU-T Recommendations by series gives another view on how the recommendations are structured: