Advanced Video Coding - Wikipedia
https://en.wikipedia.org/wiki/Advanced_Video_Coding
Advanced Video Coding (AVC), also referred to as H.264 or MPEG-4 Part 10, Advanced Video Coding (MPEG-4 AVC), is a video compression standard based on block-oriented, motion-compensated integer-DCT coding.
H.264 : Advanced video coding for generic audiovisual services
https://www.itu.int/rec/T-REC-H.264
Recommendation H.264. In force components. H.264 (2003) Corrigendum 1 (05/04). This corrigendum was never published, its content having been included in the published ITU-T Rec.