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High-performance Video Coding is a proposed video compression standard, a successor to H.264/MPEG-4 AVC (Advanced Video Coding), currently developed by the ISO/IEC Moving Picture Experts Group (MPEG).
HVC targets next-generation content capture system which feature progressive scanned frame rates and increased display resolutions up to 1080p and Ultra HD, as well as improved noise level, color gamut and dynamic range. It aims to substantially improve coding efficiency, that is decrease computational complexity compared to AVC High Profile while having the same image quality and reduced bitrate requirements, especially at high resolutions. Depending on the application requirements, HVC should be able to trade off computational complexity, compression rate and processing delay time.
Unlike the original H.265 proposal by ITU-T Video Coding Experts Group, HVC is not seen as a radical departure from H.264/AVC but rather an extension of its High Profile; however, H.265 has since drifted in a similar 'H.264+' direction and future collaboration between VCEG and MPEG, similar to the Joint Video Team on H.264/AVC, is currently under consideration.
MPEG is currently evaluating both modifications to current coding tools, such as
- adaptive loop filter (ALF),
- extended macroblock size (EMS),
- larger transform size (LTS),
- internal bit depth increasing (IBDI), and
- adaptive quantization matrix selection (AQMS),
as well as new coding tools, such as
- modified intra prediction,
- modified de-block filter, and
- decoder-side motion vector derviation (DMVD).
Evaluations are performed with modified KTA (Key Technical Area) JM11 reference software encoder developed by the MPEG/VCEG Joint Video Team. As of July 2009, recent experimental results show average bit reduction of around 20% compared with H.264/AVC High Profile at the same computational complexity. These results prompted MPEG to initiate the standardization process and issue a formal Call for Proposals (CfP) to be submitted by February 2010; evaluation of proposals should be completed by May 2010.
See also
External links
- ISO/IEC JTC1/SC29/WG11/N10361: Vision and Requirements for High-Performance Video Coding (HVC)
- MPEG Explores New Technologies for High Performance Video Coding (HVC). Press release
- Current Status of HVC (High-performance Video Coding) in MPEG. From H265.net
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