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The HEVC standard defines thirteen levels. [1] [2] A level is a set of constraints for a bitstream.[1] [2] For levels below level 4 only the Main tier is allowed.[1] [2] A decoder that conforms to a given tier/level is required to be capable of decoding all bitstreams that are encoded for that tier/level and for all lower tiers/levels.
Coding efficiency is the ability to encode video at the lowest possible bit rate while maintaining a certain level of video quality. There are two standard ways to measure the coding efficiency of a video coding standard, which are to use an objective metric, such as peak signal-to-noise ratio (PSNR), or to use subjective assessment of video ...
The HEVC Encoder is a software implementation on Intel x86 based platforms, capable of High Definition (HD) broadcast quality video encoding. The Decoder software available on ARM CortexTM-A9 and CortexTM-A15 based SoCs allows a wide range of existing Consumer Electronics (CE) devices such as Smartphones, Tablets, Smart TVs and Set-Top Boxes to ...
The quality the codec can achieve is heavily based on the compression format the codec uses. A codec is not a format, and there may be multiple codecs that implement the same compression specification – for example, MPEG-1 codecs typically do not achieve quality/size ratio comparable to codecs that implement the more modern H.264 specification.
HEVC (High Efficiency Video Coding, H.265, MPEG-H part 2) x265 (encoder only) Versatile Video Coding (H.266, VVC) VVC Test Model (VTM reference software for VVC; open source) Fraunhofer Versatile Video Decoder (open source; decoder only) Fraunhofer Versatile Video Encoder (open source; encoder only) FFmpeg (decoder only)
The design of most video coding standards is primarily aimed at having the highest coding efficiency. [2] Coding efficiency is the ability to encode video at the lowest possible bit rate while maintaining a certain level of video quality. [2] HEVC benefits from the use of larger CTB sizes. [2]
Uncompressed video requires a very high data rate. Although lossless video compression codecs perform at a compression factor of 5 to 12, a typical H.264 lossy compression video has a compression factor between 20 and 200. [69] The two key video compression techniques used in video coding standards are the DCT and motion compensation (MC).
Context-adaptive binary arithmetic coding (CABAC) is a form of entropy encoding used in the H.264/MPEG-4 AVC [1] [2] and High Efficiency Video Coding (HEVC) standards. It is a lossless compression technique, although the video coding standards in which it is used are typically for lossy compression applications.