High Efficiency Video Coding

High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard designed as part of the MPEG-H project as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10). In comparison to AVC, HEVC offers from 25% to 50% better data compression at the same level of video quality, or substantially improved video quality at the same bit rate. It supports resolutions up to 8192×4320, including 8K UHD, and unlike the primarily 8-bit AVC, HEVC's higher fidelity Main 10 profile has been incorporated into nearly all supporting hardware.

HEVC / H.265 / MPEG-H Part 2
High efficiency video coding
StatusIn force
First published7 June 2013 (2013-06-07)
Latest version8.0
22 August 2021 (2021-08-22)
OrganizationITU-T, ISO, IEC
CommitteeSG16 (VCEG), MPEG
Base standardsH.261, H.262, H.263, H.264, MPEG-1
Related standardsH.266, MPEG-5
DomainVideo compression
LicenseMPEG LA[1]

While AVC uses the integer discrete cosine transform (DCT) with 4×4 and 8×8 block sizes, HEVC uses integer DCT and DST transforms with varied block sizes between 4×4 and 32×32. The High Efficiency Image Format (HEIF) is based on HEVC.[2] As of 2019, HEVC is used by 43% of video developers, and is the second most widely used video coding format after AVC.[3]

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