Method and apparatus for removing block effect

Abstract

A block reducing method and device, mainly including the steps of: firstly, calculating flatness of pixel in both sides of edge in pane corresponding to row of part of lines in current block, calculating flatness of region of the pane obtained; then, determining edge intensity in the pane according to the flatness of region of the pane and filtering the edge in the pane according to the edge intensity; or, firstly regulating the edge intensity according to a comparing result of a motion vector of blocks on both sides of the edge and the predetermined threshold value to obtain edge intensity value regulated; then filtering the current block by regulated edge intensity. Thereof, the implement solution of loop filter provided by the embodiment of the invention can implement block reducing process effectively in the image decoding process, which enables the subject quality of the image decoded to be high and peak value Signal-to-Noise to be improved objectively.

Description

technical field [0001] The invention relates to the technical field of video image coding and decoding, in particular to a solution for realizing deblocking effect in the coding and decoding process. Background technique [0002] With the development of multimedia technology and the promotion of multimedia applications, various video image compression standards have been widely used. In video coding standards such as H.264 and AVS (Advanced Audio and Video Coding formulated by the China Digital Audio and Video Coding and Decoding Technology Standard Working Group), it is necessary to divide the image into blocks, so that each block obtained by the processing is transformed Different degrees of block effects will appear after quantization. The occurrence of the block effect is mainly caused by the quantization error in the block processing process during quantization. The block effect is mainly manifested as trapezoidal noise and lattice noise, and the noise will make the ed...

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Problems solved by technology

[0026] In the above pixel-based block-level boundary strength judgment filtering implementation scheme, specifically, the filtering strength judgment is performed based on the relationship between pixels in units of coding blocks, and its boundary filtering strength judgment is limited to the coding block unit, which lacks flexibility; and , since the pixels in the entire coding block are used to determine the flatness of the region and then determine the corresponding boundary strength, the accuracy of the boundary strength is reduced, which in turn leads to a lack of sufficient accuracy in the filtering judgment

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