A method for quickly computing intensity of block removal filtering boundary in H.264 video standard

Abstract

The invention relates to a method, which can quickly calculate the boundary strength value of deblocking filtering in H.264 video standards: read the encoding status of sub-blocks m, n on both sides of the filtering side, and conduct the following operations: 1). If the macro blocks that the m, n sub-blocks belong to has at least one intra-frame encoding mode, pre-determine the boundary strength value of the 16 pixel points of the whole current filtering side is 4 or 3; 2). If the m, n sub-blocks are in the same macro block, and the encoding mode of the macro block is inter-frame 16*16, 16*8 or 8*16, further determine the position and block information of the filtering side, and thereby pre-determine the boundary strength value of the 16 pixel points of the current filtering side is 0 or 1. After the pre-determining step, conduct correction based on H.264 standards, and finally get the boundary strength value BS. 3). If the m, n sub-blocks are in the same macro block, and the encoding mode of the macro block is inter-frame 8*8, 8*4, 4*8 or 4*4, using 4*4 block as the unit, calculate the boundary strength based on H.264 standards.

Description

technical field [0001] The invention relates to the field of deblocking filtering in the H.264 video standard, in particular to a fast calculation method for the boundary strength (Boundary Strength) value in the H.264 deblocking filtering. Background technique [0002] The H.264 video standard is a set of video codec standards officially released by the ITU-T International Standards Organization in March 2005 (H.264 standard book: "Joint Video Team of ITU-T and ISO / IEC Recommendation H.264: Advanced video coding for generic audiovisual services"). [0003] The deblocking filter technology is one of the new technologies adopted by the H.264 standard. Its introduction not only improves the compression efficiency, but also improves the subjective effect of the image. However, its computational complexity is also relatively high, especially in the decoder, where the calculation amount of the deblocking filter accounts for about 1 / 3 of the total calculation amount of the decode...

AI Technical Summary

Problems solved by technology

[0005] From the above analysis, it can be seen that the calculation method proposed by the H.264 standard does not make full use of the correlation between pixels on the filtering edge, and does not take advantage of the large proportion of the large block mode in the H.264 coding mode. characteristics, resulting in a lot of repeated calculations, greatly increasing the filtering time

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