High speed de-blocking effect filtering method

Abstract

The invention discloses a high speed de-blocking effect filtering method in the field of video image processing, which mainly solves the problem of lower de-blocking effect filtering speed in the prior art. The high speed de-blocking effect filtering method comprises the following steps of: (1) transversely segmenting a macro block; (2) filtering a vertical edge of the macro block and circularly filtering 4*4 sub-block edges of brightness data and chromaticity data according to the order from left to right; (3) longitudinally segmenting the macro block; and (4) filtering a horizontal edge of the macro block and circularly filtering 4*4 sub-block edges of the brightness data and the chromaticity data according to the order from top to bottom. In the invention, the filtering process of the vertical edge and the horizontal edge of the macro block is divided into five steps of: reading data, calculating an upper limit value and a filtering intensity value of a filtering pixel, pre-filtering, updating the pixel and outputting the data. The invention reduces the data access period in the filtering process and more reasonably divides the filtering process and improves the filtering speed.

Description

technical field [0001] The invention relates to the technical field of video image processing, and further relates to a high-speed deblocking filtering method. Background technique [0002] In order to improve the block effect produced by the video image after decoding, the deblocking filter technology has been widely used at the decoding end. The deblocking filtering technology is to filter each 4×4 sub-block pixel in the image according to the boundary strength and quantization coefficient of each 4×4 sub-block in the video image macroblock, so as to eliminate the image caused by transformation and quantization. block effect. The deblocking filter technology performs vertical and horizontal filtering twice on the content of each 4×4 block in the image, which involves a large number of numerical calculations and memory reading and writing. [0003] In the existing deblocking filtering methods, how to improve the filtering speed is the design focus. For example, in the pa...

AI Technical Summary

Problems solved by technology

This method divides a macroblock into eight 4×8 blocks, and then filters the boundaries of the 4×4 sub-blocks in each 4×8 block in order from top to bottom. This macroblock boundary filtering order makes The usage of on-chip memory resources is further reduced, and the number of filtering cycles is also reduced by 7, but the order of boundary filtering in this method is too complicated. Although the usage of on-chip resources is reduced, the control logic takes up more resources , and affect the further improvement of the filtering speed

Images