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. As of 2019, HEVC is used by 43% of video developers, and is the second most widely used video coding format after 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 integer DCT and DST transforms 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 Main10 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). Video compression format, succeeds H.264/MPEG-4 AVC HEVC / H.265 / MPEG-H Part 2 High efficiency video coding
