Motion vector calculating method of AVS motion compensation

Abstract

The invention, which belongs to the video coding and decoding technology field, relates to a motion vector calculating method of motion compensation of an audio video coding standard (AVS), thereby solving a technical problem of simplification on motion vector calculation. Specifically, the method comprises the following calculating steps that: (1), according to a dividing mode of a current macro-block, a macro-block control word is distributed to the macro-block; (2), the current macro-block is divided into four decoding blocks with the dimension of 8*8 and the divided four decoding blocks are numbered sequentially (from 0 to 3); and (3), according to the dividing mode of the current macro-block and the control word of the macro-block, decoding is carried out successively on all the decoding blocks of the current macro-block; if a flag bit value of a macro-block control word corresponding to a current decoding block is 1, the motion vector value of the current decoding block is calculated; and conversely, a motion vector value stored in a vector register is directly read as the motion vector value of the current decoding block. According to the invention, the provided method has the following advantages that: the utilization rate of the memory is high; the calculating speed is fast; the calculation can be controlled simply; and it is convenient to realize hardware.

Description

technical field [0001] The present invention relates to video encoding and decoding technology, in particular to a motion vector calculation method for AVS motion compensation. Background technique [0002] The digital audio and video codec standard is the basic standard of the digital audio and video industry, and has huge industrial demand in the fields of broadcasting, telecommunications, and consumer electronics. [0003] The AVS (Audio Video Coding Standard) standard is a digital audio and video codec technology standard independently formulated by China. The coding efficiency of this technical standard is equivalent to that of H.264, 2-3 times higher than that of MPEG-2, and the technical solution is simple. The implementation complexity is lower than that of H.264, reaching the highest level of the second generation standard. The characteristic core technologies in the AVS standard include: 8×8 integer transformation, quantization, intra-frame prediction, 1 / 4-precisi...

AI Technical Summary

Problems solved by technology

In order to achieve high coding efficiency and concise implementation, the AVS standard uses 16×16, 16×8, 8×16 and 8×8 macroblock division methods when processing motion vector prediction. This macroblock division method is beneficial to Improve the efficiency of video compression coding, but the existing calculation method of AVS motion compensation is to directly calculate the motion vector of each macroblock, because the size of each macroblock is not uniform, the calculation of the motion vector is more complicated and requires a large amount of memory resources, its calculation speed is slow, and it is not convenient for hardware implementation

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