Brightness transformation domain intra-frame prediction coding and decoding method and system

An intra-frame prediction coding and intra-frame prediction technology, which is applied in the field of video coding and decoding, can solve problems such as the rate-distortion performance effect is not obvious

Active Publication Date: 2013-03-20
深圳市梦网视讯有限公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to propose a method and system for intra-frame predictive coding in the luminance transform domain, aiming at solving the problem of improving rate-dist

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  • Brightness transformation domain intra-frame prediction coding and decoding method and system
  • Brightness transformation domain intra-frame prediction coding and decoding method and system
  • Brightness transformation domain intra-frame prediction coding and decoding method and system

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Embodiment 1

[0072] figure 1 It is a flow chart of a method for intra-frame prediction coding in luminance transform domain according to a preferred embodiment of the present invention;

[0073] The method comprises the steps of:

[0074] S101: Transform the spatial domain information block of the current coding block to obtain the transformation domain information block of the current coding block.

[0075] Specifically:

[0076] t _ y ( 1,1 ) t _ y ( 1,2 ) . . . t _ y ...

Embodiment 2

[0125] Figure 4 It is a flow chart of an intra-frame predictive decoding method in a luminance transform domain in a preferred embodiment of the present invention; the decoding method is a corresponding intra-frame predictive decoding method in a luminance transform domain proposed based on the encoding method in Embodiment 1. The decoding method is suitable for decoding intra-frame prediction coded blocks, and specifically includes the following steps:

[0126] S201: Perform entropy decoding and reordering on the code stream of the current decoding block, and then perform dequantization.

[0127] S202: According to the intra prediction mode of the current decoding block, perform transform domain intra prediction according to the first prediction mode group, and acquire the transform domain intra prediction value of the current decoding block.

[0128] The first prediction mode group includes the following five modes:

[0129] Mode 1: Transform domain left prediction mode ...

Embodiment 3

[0162] Figure 5 It is a schematic structural diagram of a luma transform-domain intra-frame predictive coding system according to a preferred embodiment of the present invention; the system includes: a transform-domain information block acquisition module, a first transform-domain intra-frame prediction device, an intra-frame prediction error calculation module, and an optimal frame Intra-prediction mode acquisition module;

[0163] A transformation domain information block acquisition module, configured to transform the spatial domain information block of the current coding block, and obtain the transformation domain information block of the current coding block;

[0164]The first transform-domain intra prediction device is configured to classify the transform-domain information blocks of the current coding block, and each type of data is transformed-domain intra-prediction according to the first prediction mode group;

[0165] The intra-frame prediction error calculation m...

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Abstract

The invention discloses a brightness transformation domain intra-frame prediction coding and decoding method and a system, and belongs to the field of video coding and decoding. According to the coding and decoding method, a high energy-accumulation performance of a transformation domain and relevance between a current coding block and an adjacent coded block are adopted for transformation domain intra-frame prediction of a transform domain information block; redundancy of intra-frame information is eliminated; the coding process can be rough divided into a prediction module, a transformation module, a quantification module, a reordering module, an entropy coding module, and the like; the used transformation method is a transform method of the transformation module of the subsequent coding process; a calculation load is not increased additionally; and as the transformation domain has the characteristic of high energy-accumulation performance compared with a space domain, the coding and decoding method and the system can improve the intra-frame prediction performance.

Description

technical field [0001] The present invention relates to the field of video coding and decoding, in particular to a method and system for intra-frame prediction coding and decoding in luma transform domain. 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....

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N19/11H04N19/124H04N19/147H04N19/44H04N19/61
Inventor 洪婷
Owner 深圳市梦网视讯有限公司
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