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Method and system for predicted encoding and decoding in chrominance frame of transform domain

An intra-frame prediction coding and intra-frame prediction technology, applied in the field of video coding and decoding, can solve problems such as huge amount of calculation and difficulty in achieving optimal realization of rate-distortion performance

Inactive Publication Date: 2013-11-20
深圳市云宙多媒体技术有限公司
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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to propose a transform-domain chroma intra-frame predictive coding method, which aims to solve the problem that the conventional video coding technology in the prior art is either difficult to achieve the optimal realization of the rate-distortion performance, or although it can achieve the improvement of the prediction effect , but the problem of huge amount of calculation

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  • Method and system for predicted encoding and decoding in chrominance frame of transform domain
  • Method and system for predicted encoding and decoding in chrominance frame of transform domain
  • Method and system for predicted encoding and decoding in chrominance frame of transform domain

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Embodiment 1

[0079] Embodiment 1 (encoding method 1)

[0080] figure 1 It is a flow chart of a transform domain U chroma intra-frame predictive coding method in a preferred embodiment of the present invention; the method includes the following steps:

[0081] S101: According to the size of the transformation matrix in the transformation module, divide the spatial domain U chrominance information block (original block) of the current coding block into a block matrix; the details are as follows:

[0082] U ( 1,1 ) U ( 1,2 ) · · · U ( 1 , ...

Embodiment 2

[0138] Embodiment 2 (decoding method 1)

[0139] Such as Figure 4 Shown is a flow chart of a transform-domain U-chroma intra-frame predictive decoding method in a preferred embodiment of the present invention (Embodiment 2 is based on a transform-domain U-chroma intra-frame predictive encoding method in embodiment 1, and a corresponding A transform-domain chroma intra-frame prediction decoding method); the decoding method includes the following steps:

[0140] S201: Perform entropy decoding and reordering on the code stream of the current decoding block, and then perform dequantization.

[0141] S202: According to the intra prediction mode of the current decoding block, perform transform domain intra prediction according to the four prediction modes in the following second prediction mode group, and obtain the transform domain intra prediction value of the current decoding block.

[0142] The second prediction mode group specifically includes the following four prediction m...

Embodiment 3

[0168] Embodiment 3 (system corresponding to encoding method 1)

[0169] Figure 5 It is a structural diagram of a transform domain U chroma intra frame predictive coding system according to preferred embodiment 3 of the present invention; the system includes: a space domain U chroma information block division module, a transform domain sub-block acquisition module, and a transform domain intra frame prediction module , an intra-frame prediction error calculation module, an optimal intra-frame prediction mode acquisition module,

[0170] The spatial domain U chrominance information block division module is used to divide the spatial domain U chrominance information block (original block) of the current coding block into a block matrix according to the size of the transformation matrix in the transformation module;

[0171] A transform domain sub-block acquisition module, configured to transform each spatial domain sub-block of the current coding block, and obtain the correspo...

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Abstract

The invention provides a method and a system for predicted encoding and decoding in a chrominance frame of a transform domain. The method is used for eliminating the redundancy degree of information in the frame by utilizing the high energy gathering property of the transform domain and the correlation of the current encoding block and the adjacent encoded block, wherein the encoding flow can be roughly divided into a prediction block, a transform block, a variant block, a rearranging block, an entropy encoding block and the like. The method has the advantages that the used transform method is the transform algorithm of the transform block of the subsequent encoding flow, so the additional increasing of calculation amount is not needed; in addition, compared with the space domain, the transform domain has higher energy gathering property, so the prediction property in the frame is improved.

Description

technical field [0001] The present invention relates to the field of video coding and decoding, in particular to a transform domain chroma intra-frame prediction coding and decoding method and system. Background technique [0002] As the reference frame of the subsequent inter-frame predictive coding frame, the compression quality of the intra-frame predictive coding frame will affect the compression quality of several subsequent inter-frame predictive coding frames, so the intra-frame predictive coding technology occupies a very important position in the entire coding technology. On the other hand, the redundancy of intra-frame information is much smaller than the redundancy of inter-frame information, so that the encoder has relatively high requirements on the performance of intra-frame prediction technology. [0003] At present, conventional video coding technologies generally eliminate intra-frame information redundancy through spatial-domain intra-frame prediction. The...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50
Inventor 舒倩
Owner 深圳市云宙多媒体技术有限公司
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