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The HEVC standard defines two tiers: Main and High. [1] [2] The Main tier is a lower tier than the High tier. [1] [2] The tiers were made to deal with applications that differ in terms of their maximum bit rate. [1] The Main tier was designed for most applications while the High tier was designed for very demanding applications. [1]
On January 5, 2015, Nvidia officially announced the Tegra X1 SoC with full fixed-function HEVC hardware decoding. [97] [98] On January 22, 2015, Nvidia released the GeForce GTX 960 (GM206), which includes the world's first full fixed function HEVC Main/Main10 hardware decoder in a discrete graphics card. [99]
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.
High 4:4:4 Predictive Profile (Hi444PP): This profile builds on top of the High 4:2:2 Profile, supporting up to 4:4:4 chroma sampling, up to 14 bits per sample, and additionally supporting efficient lossless region coding and the coding of each picture as three separate color planes.
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]
In high bitrate encodings, the content payload is usually large enough to make the overhead data relatively insignificant, but in low bitrate encodings, the inefficiency of the overhead can significantly affect the resulting file size if the container uses large stream packet headers or a large number of packets.
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.
Part 5: Reference Software for High Efficiency Video Coding [4] (also published as ITU-T H.265.2) [11] Part 6: 3D Audio Reference Software; Part 7: MMT Conformance (not yet published) Part 8: Conformance Specification for HEVC [5] (also published as ITU-T H.265.1) [12] Part 9: 3D Audio Conformance Testing