Method for dividing and rebuilding video coding predictive residue block

Abstract

The invention provides a method for dividing and rebuilding a video coding predictive residue block, and belongs to the technical field of video coding in signal treatment. The invention aims to reduce the blocking effect due to the prior DCT transformation matrix and solve the problem that the value of the matrix cannot be adjusted. The division method comprises a predictive residue block classification step, a transverse division step of first, third and second multi-channel filter groups, a classification step of transverse division coefficient matrixes and a longitudinal division step of the first, the third and the second multi-channel filter groups; and the rebuilding method comprises a classification step of the division coefficient matrixes of the predictive residue block, a longitudinal rebuilding step of the first, the third and the second multi-channel filter groups; a classification step of the transverse division coefficient matrixes and a transverse rebuilding step of the first, the third and the second multi-channel filter groups. The method has the advantages of effectively removing correlation, reducing the blocking effect due to the size mismatching of the DCT transformation matrix and the predictive residue block, and improving subjective and objective qualities of coding.

Description

technical field [0001] The invention belongs to the technical field of video coding in signal processing, in particular to a method for decomposing and reconstructing video coding prediction residual blocks. Background technique [0002] H.264 / AVC is the latest video coding standard jointly proposed by the Video Coding Expert Group of ITU-T (International Telecommunication Union Standardization Group for Telecommunications) and the Motion Picture Expert Group of ISO / IEC (International Organization for Standardization / International Electrotechnical Commission). Compared with the MPEG-4 encoding standard, H.264 / AVC can save about 50% bit rate under the condition of obtaining the same video quality. In order to obtain high compression rate, H.264 / AVC proposes some new coding methods, such as intra prediction, motion compensation, loop filtering, context-based entropy coding, etc. [0003] Video encoding process such as figure 1 As shown, the intra-frame or inter-frame predict...

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Problems solved by technology

[0007] The present invention provides a method for decomposing a video coding prediction residual block, and at the same time provides a reconstruction method for a video coding prediction residual block, which reduces the block effect caused by the size mismatch between the existing DCT transformation matrix and the prediction residual block, And solve the problem that the value of the DCT transformation matrix cannot be adjusted according to the energy distribution of the prediction residual block signal, so as to effectively remove the correlation of the prediction residual block and improve the video coding quality

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