Search results
Results from the WOW.Com Content Network
The Main 10 profile allows for improved video quality since it can support video with a higher bit depth than what is supported by the Main profile. [159] Additionally, in the Main 10 profile 8-bit video can be coded with a higher bit depth of 10 bits, which allows improved coding efficiency compared to the Main profile. [162] [163] [164]
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.
On January 15, 2014, oViCs announced the ViC-1 HEVC decoder which supports the Main 10 profile at up to 4K at 120 fps. [90]On February 13, 2014, PathPartner Technology Pvt.Ltd announced HEVC Decoder on ARM Cortex-A Family Processors which takes advantage of the full capabilities of mobile SoCs built on latest ARM processors.
The standard also contains four additional all-Intra profiles, which are defined as simple subsets of other corresponding profiles. These are mostly for professional (e.g., camera and editing system) applications: High 10 Intra Profile: The High 10 Profile constrained to all-Intra use.
x265 source code is written in C++ and x86 assembly. [3]x265 supports the Main, Main 10, Main 12 and Main Still Picture profiles [11] of HEVC (including intra-only profiles), utilizing a bit depth of either 8 bits or 10 bits per sample YCbCr with 4:2:0, 4:2:2 or 4:4:4 chroma subsampling.
The seventh generation of PureVideo HD, introduced with the GeForce GTX 960 and GTX 950, a second generation Maxwell GPU (GM206), adds full hardware-decode of H.265 HEVC Version 1 (Main and Main 10 profiles) to the GPU's video-engine. Feature Set F hardware decoder also supports full fixed function VP9 (video codec) hardware decoding. [11]
The tests also showed that it took 60% longer to decode HEVC video encoded at 16×16 CTU size than at 64×64 CTU size. [2] The tests showed that large CTU sizes increase coding efficiency while also reducing decoding time. [2] The tests were conducted with the Main profile of HEVC based on equal PSNR. [2]
OpenH264 (baseline profile only) x264 (encoder only; supports some of Hi422P and Hi444PP features) FFmpeg (decoder only) MPEG-4 AVC variants: MPEG-4 Web Video Coding or MPEG-4 Part 29 – a subset of MPEG-4 AVC baseline profile; XAVC; HEVC (High Efficiency Video Coding, H.265, MPEG-H part 2) x265 (encoder only) Versatile Video Coding (H.266, VVC)