MPEG HEVC, short for High Efficiency Video Coding, also known as H.265and MPEG-H Part 2, is an industry standard for video compression and a successor to H264/MPEG-4 AVC (Advanced Video Coding). HEVC benefits versus H.264/MPEG-4 AVC:
- Higher performance (same video quality with half network bandwidth): HEVC improves coding efficiency by a factor of ~2 with comparable video quality. It offers compression efficiency gains by using block structures of 8×8,16×16, 32×32, 64×64 (AVC uses macroblocks of 16×16 only) to better match block size to the content.
- Higher resolution: up to4k and 8kultra High Definition TV (upto 8192×4320).
- Future-proof: addresses the challenge of growing bandwidth demand for video and the operator's bandwidth constraints and costs (eg for mobile and internet streaming).
In terms of its origin, HEVC was developed jointly by the International Telecommunications Union (ITU-T) and the Moving Picture Experts Group (MPEG), in a Joint Collaborative Team on Video Coding (JCT-VC). There are several profiles (a profile is a defined set of coding tools that can be used to create a bitstream that conforms to that profile), defined in each version of a standard. Below the last profiles for HEVC versions:
- Version 1 (April 2013) of the HEVC standard defines three profiles: Main (also called: HEVC 8 or HEVC 8 bits compatible), Main 10 (also called: HEVC 10 or HEVC 10 bits compatible), and Main Still Picture.
- Version 2 (early 2015) of HEVC adds 21 range extensions profiles (supporting higher bit depths and 4:0:0,4:2:2, and 4:4:4 chroma sampling formats), two scalable extensions profiles (SHVC), and one multi-view profile (MV-HEVC).