Filtering method for intra-frame and inter-frame prediction

Abstract

The invention discloses a filtering method for intra-frame and inter-frame prediction. For pixel values obtained after prediction, whether to filter prediction blocks or not is adaptively selected through RDO (Rate distortion optimization) decision; filters are established based on a generalized Gaussian distribution function; different filters are employed for the prediction blocks of different sizes; the prediction blocks of various sizes are trained to obtain filter parameters. At a coding end, RDO is carried out on each coding unit; intra-frame prediction or inter-frame prediction is carried out on each coding unit; the prediction blocks are filtered through utilization of the filtering method provided by the invention; and whether to employ prediction block filtering or not is determined through RDO decision. At a decoding end, for different prediction block sizes, different filtering coefficients are set; and decoding is carried out according to marks. The distortion problem of the prediction blocks is solved. The prediction precision is improved. The coding efficiency of intra-frame and inter-frame prediction blocks is improved.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a filtering method for intra-frame and inter-frame prediction, which can be used to filter intra-frame prediction blocks and inter-frame prediction blocks to enhance prediction accuracy and improve coding efficiency. Background technique [0002] Predictive filtering technology is a very effective coding tool for optimizing the boundaries of prediction blocks, which can effectively alleviate the distortion at the boundaries of prediction blocks. [0003] In the High Efficiency Video Coding (HEVC) standard, the existing method adopts two types of boundary filter technologies for intra-frame prediction. One is for the DC (Direct Current) prediction mode (DC prediction mode), using a two-tap filter (filter coefficient is [1 / 4 3 / 4]) to the first row and first column of the intra prediction block Filtering; the other is to filter the first row of the horizontal predictio...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiencies of the prior art above, the present invention provides a filtering method for intra-frame and inter-frame prediction to effectively solve the problem of prediction block distortion and improve the prediction accuracy of the prediction block

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