These redundant areas are then replaced with a short description instead of the original pixels. Both work by comparing different parts of a frame of video to find areas that are redundant, both within a single frame and between consecutive frames.
In most ways, HEVC is an extension of the concepts in H.264/MPEG-4 AVC. The High Efficiency Image Format (HEIF) is based on HEVC. While AVC uses the integer discrete cosine transform (DCT) with 4×4 and 8×8 block sizes, HEVC uses both integer DCT and discrete sine transform (DST) with varied block sizes between 4×4 and 32×32. 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. 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.
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). SG16 (Secretary: Simao Campos) ( VCEG), MPEG HEVC / H.265 / MPEG-H Part 2 High efficiency video coding Video compression format, succeeds H.264/MPEG-4 AVC
