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Method and apparatus of non-square intra prediction for chroma components in coding system with quad-tree and binary-tree partition

A non-square, intra-frame prediction technology, applied in the field of codec technology, can solve the problem of limited intra-frame prediction of chroma components

Inactive Publication Date: 2018-08-28
MEDIATEK INC
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Problems solved by technology

[0028] In existing coding standards or practices, intra prediction of chroma components is very limited

Method used

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  • Method and apparatus of non-square intra prediction for chroma components in coding system with quad-tree and binary-tree partition
  • Method and apparatus of non-square intra prediction for chroma components in coding system with quad-tree and binary-tree partition
  • Method and apparatus of non-square intra prediction for chroma components in coding system with quad-tree and binary-tree partition

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Embodiment Construction

[0044] The following description is a preferred mode of carrying out the present invention. This article is only used to illustrate the technical characteristics of the present invention, and is not intended to limit the present invention. The scope of protection of the present invention should be defined by the claims.

[0045] As mentioned earlier, current HEVC only allows 2Nx2N intra prediction for chroma components. This limitation may limit the coding efficiency of the chroma components. Therefore, the present invention allows other intra prediction modes for chroma components. Specifically, the present invention enables non-square intra prediction of chroma components to achieve higher coding performance.

[0046] Non-square intra prediction can be achieved by enabling various partitioning modes for chroma components within an intra-coded CU. Enabled split modes are not limited to figure 2 8 split modes in . According to an embodiment of the present invention, whe...

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Abstract

A method and apparatus for intra prediction of non-square chroma blocks are disclosed. The system uses a block partitioning structure for partitioning a chroma block into one or more final sub-blocksincluding at least one non-square final sub-block using block partition recursively. The block partition either splits each given block into intermediate sub-blocks using one or more split modes including one binary split mode or applies no splitting to each given block. The block is treated as an initial given block and each intermediate sub-block is treated as one given block in a next recursion. Any given block that is not further split becomes a final sub-block. After the final sub-blocks are determined, non-square Intra prediction is applied to each non-square final sub-block.

Description

[0001] cross reference [0002] This application claims the priority of PCT patent application No. PCT / CN2015 / 075672 filed on April 1, 2015. The aforementioned PCT patent application is incorporated herein by reference in its entirety. technical field [0003] Embodiments disclosed herein relate to video decoding. In particular, the present invention relates to a codec technique in a coding system using partitioning of quadtrees and binary trees, which is related to non-square intra prediction for chrominance components. Background technique [0004] Interframe coding with motion compensation has been widely used in various coding standards, such as MPEG-1 / 2 / 4 and H.261 / H.263 / H.264 / AVC. Motion-compensated inter-frame coding can effectively reduce the bit rate (bitrate) of compressed video, while intra-frame coding needs to compress areas with high motion or scene changes. In addition, intra-frame coding is also used to process original images or to periodically insert I-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/61
CPCH04N19/96H04N19/186H04N19/105H04N19/176H04N19/157H04N19/593H04N19/122
Inventor 陈渏纹安基程林建良黃毓文
Owner MEDIATEK INC
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