H.263
Sign in to saveH.263 is a video compression standard originally designed as a low-bit-rate compressed format for videotelephony. It was standardized by the ITU-T Video Coding Experts Group (VCEG) in a project ending in 1995/1996. It is a member of the H.26x family of video coding standards in the domain of the ITU-T.
Key facts
- Technology standard.title
- H.263
- Technology standard.long_name
- Video coding for low bit rate communication
- Technology standard.status
- In force
- Technology standard.version
- 3rd edition
- Technology standard.organization
- ITU-T
- Technology standard.committee
- VCEG
- Technology standard.base_standards
- H.261, H.262 (aka MPEG-2 Video)
- Technology standard.related_standards
- H.264, H.265, H.266, H.323, H.324, ISO/IEC 14496-2
- Technology standard.predecessor
- H.262
- Technology standard.successor
- H.264
- Technology standard.domain
- Video compression
- Technology standard.license
- RAND
- Technology standard.website
- www.itu.int/rec/T-REC-H.263
via Wikipedia infobox
Wikidata facts
Show 2 more facts
- Stack Exchange tag
- stackoverflow.com/tags/h.263
- media type
- video/H263-2000
Sources (2)
via Wikidata · CC0
~9 min read
Article
9 sectionsContents
- History and background
- Versions
- Version 1 and Annex I
- H.263v2 (H.263+)
- H.263v3 (H.263++) and Annex X
- Patent rights and open-source implementation
- See also
- References
- External links
H.263 is a video compression standard originally designed as a low-bit-rate compressed format for videotelephony. It was standardized by the ITU-T Video Coding Experts Group (VCEG) in a project ending in 1995/1996. It is a member of the H.26x family of video coding standards in the domain of the ITU-T.
Like the previous H.26x standards, H.263 is a block-based hybrid video coding scheme using 16×16 macroblocks of YCbCr color sample arrays, motion-compensated prediction, an 8×8 discrete cosine transform for prediction differences, zig-zag scanning of transform coefficients, scalar quantization, run-length transform coefficient symbols, and variable-length coding (basically like Huffman coding but with structured coding tables). The first (1995) version of H.263 included some optional features including overlapped block motion compensation and variable block-size motion compensation, and the spec was later extended to add various additional enhanced features in 1998 and 2000. Smaller additions were also made in 1997 and 2001, and a unified edition was produced in 2005.