Method, system and filter for filtering de-block

Abstract

The invention is applicable to the field of the video decoding based on blocks, and provides a method, a system, and a filter for realizing the de-blocking filer. The invention is characterize in that a video and an image frame are divided into a plurality of 16*16 macro blocks; each block is divided into sixteen 4*4 subblocks; the macro blocks are divided into four lines in the way that four blocks are arranged on one line; and the upper boundary and the left boundary of each block in the macro blocks are filtered. The filtering method comprises the following steps: reading the current macro blocks to an internal memory; filtering the current macro blocks by taking a line as a unit; and storing the line where one-line filtering is finished. After the image information of 16*16 macro blocks is read to the internal memory, the horizontal filtering is conducted on the vertical boundary of one line, the vertical filtering is conducted on the horizontal boundary of the line, the filtering is conducted on the next line in sequence, the judgment of whether or not the line is involved in the subsequent filtering process should be conducted after one-line filtering is finished, the image information obtained by filtering the line and the upper line is stored in the internal memory or the external memory according to the judgment result.

Description

technical field [0001] The invention belongs to the field of block-based video encoding and decoding, and in particular relates to a deblocking filtering method, system and deblocking filter. Background technique [0002] The traditional block-based video codec system always encounters the problem of block effect when encoding and decoding video with a relatively low bit rate. The occurrence of block effect seriously affects the subjective quality of the image, and the reason is caused by block-based prediction, compensation, transformation, and quantization. In order to overcome this blocking effect, the new video codec introduces a deblocking filter (Deblocking) system in the coding loop, referred to as "filtering". One of the important factors of good subjective visual effect is an important part of the new video codec. [0003] Since the integer transformation in the new video codec is based on 4×4 points, the deblocking filter system also processes 4×4 sub-blocks as a...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a deblocking filtering method, aiming to solve the problem in the prior art that the filtering method of storing each macroblock after horizontal and vertical filtering affects the data processing speed

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