Intra Prediction and Deblocking Filtering Method

Abstract

The invention discloses an intra-frame prediction and deblocking filtering method. At a coding end, after a transform unit TU finishes transform quantization, inverse quantization and inverse transform, a reconstruction image of a current transform unit TU or a current coding unit CU is obtained through calculation; horizontal deblocking filtering is carried out on vertical boundaries contained in the reconstruction image; and then intra-frame prediction is carried out according to the reconstruction image of which the vertical boundaries are processed by horizontal deblocking filtering. Through adoption of the method, the intra-frame prediction accuracy in video coding can be improved; and the coding compression rate is further improved.

Description

technical field [0001] The invention belongs to the field of video encoding and decoding, and in particular relates to an intra-frame prediction and deblocking filtering method. Background technique [0002] The H.264 standard introduces two functions of intra-frame prediction and deblocking filtering. Intra-frame prediction uses the pixels of adjacent blocks to predict the current block to better eliminate spatial redundancy in a single frame image, so that only the prediction block and the residual of the current block are encoded. When a macroblock is coded in the intra-frame prediction mode, a predictive block P is constructed using a previously coded and reconstructed block that has not been deblock-filtered. For the luma component, a prediction block P can be created for each 4*4, 8*8 block or 16*16 macroblock. In the H.264 standard, such as figure 1 As shown, some or all of the 13 sample points (A-L and Q) that have been decoded in adjacent blocks are used to predi...

AI Technical Summary

Problems solved by technology

However, in H.265, intra-frame prediction still uses points that have been coded and reconstructed but not subjected to deblocking filtering. This will increase the prediction error just like H.264, resulting in an increase in the residual and reducing the compression efficiency.

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