The English used in this article or section may not be easy for everybody to understand. (August 2023)
|High efficiency video coding|
|First published||June 7, 2013|
August 22, 2021
|Organization||ITU-T, ISO, IEC|
|Committee||SG16 (Secretary: Simao Campos) (VCEG), MPEG|
|Base standards||H.261, H.262, H.263, H.264, MPEG-1|
|Related standards||H.266, MPEG-5|
High Efficiency Video Coding ,HEVC (H.265), also known as MPEG-H Part 2, is a video compression standard succeeding AVC (H.264). It offers 25-50% better compression or improved quality at the same bit rate. Supporting up to 8K resolution, HEVC employs diverse block sizes (4x4 to 32x32) with both integer DCT and DST. HEIF is based on HEVC.
Concept[change | change source]
HEVC builds upon H.264/MPEG-4 AVC concepts. Both analyze video frames for redundancies within and between frames. Redundant parts are replaced with concise descriptions. HEVC enhances this by expanding comparison areas up to 64x64 pixels, refining variable-block-size segmentation, enhancing "intra" prediction within frames, improving motion prediction and compensation, and adding sample-adaptive offset filtering. These improvements increase compression processing, but decompression is less affected.
HEVC was standardized by the Joint Collaborative Team on Video Coding (JCT-VC), a collaboration between ISO/IEC MPEG and ITU-T Study Group 16 VCEG. It's known as MPEG-H Part 2 by ISO/IEC and as H.265 by ITU-T. The first version was ratified in January 2013 and published in June 2013. The second version, including multiview, range, and scalability extensions, was approved in 2014 and published in 2015. 3D and screen content coding extensions followed in 2015 and 2017 respectively, catering to graphics-rich content. In 2017, HEVC received a Primetime Emmy Engineering Award for its significant impact on television technology.
History[change | change source]
HEVC was collaboratively developed by over a dozen global organizations. Key patent contributors were Samsung Electronics (4,249 patents), General Electric (1,127 patents), M&K Holdings (907 patents), NTT (878 patents), and JVC Kenwood (628 patents). Additional patent holders include Fujitsu, Apple, Canon, Columbia University, KAIST, Kwangwoon University, MIT, Sungkyunkwan University, Funai, Hikvision, KBS, KT, and NEC.
References[change | change source]
- Thomson, Gavin; Shah, Athar (2017). "Introducing HEIF and HEVC" (PDF). Apple Inc. Retrieved 5 August 2019.
- "High Efficiency Video Coding (HEVC) Family, H.265, MPEG-H Part 2". www.loc.gov. 2020-11-19. Retrieved 2023-08-27.
- Pandora (2023-07-27). "HEVC (High Efficiency Video Coding): Een Gedetailleerde Uitleg". IPTV (in Dutch). Retrieved 2023-08-27.
- "69th Engineering Emmy Awards Recipients Announced". Television Academy. Retrieved 2023-08-27.
- ITU. "ITU, ISO and IEC receive another Primetime Emmy for video compression". Retrieved 2023-08-27.
- "Engineering Emmy Award for HEVC Standard - RWTH AACHEN UNIVERSITY - English". www.rwth-aachen.de. Retrieved 2023-08-27.
- Ryon, Ben (2017-09-29). "Primetime Engineering Emmy® Award goes to HEVC, a key technology behind ultra-high definition TV". Microsoft Research. Retrieved 2023-08-27.
- "HEVC Licensors". ViaLa. Archived from the original on 2023-07-13. Retrieved 2023-08-27.
- "HEVC Advance". web.archive.org. 2020-08-24. Archived from the original on 2020-08-24. Retrieved 2023-08-27.