A motion vector encoding method and device

Abstract

The invention provides a motion vector coding method, comprising the steps of searching from motion vectors of reference prediction coding blocks of to-be-coded image blocks to obtain the set number of prediction motion vectors which form a prediction motion vector set; judging whether the prediction motion vectors the same to the motion vectors of the to-be-coded image blocks exist in the prediction motion vector set or not; if the prediction motion vectors the same to the motion vectors of the to-be-coded image blocks exist, coding a serial number index of the prediction motion vectors the same to the motion vectors of the to-be-coded image blocks; and if the prediction motion vectors the same to the motion vectors of the to-be-coded image blocks do not exist, carrying out differential coding processing on the motion vectors of the to-be-coded image blocks according to the prediction motion vectors in the prediction motion vector set. According to the motion vector coding method provided by the invention, prediction motion vectors applied in the coding process are relatively many, corresponding coding processing is carried out by taking different situations into full consideration, and the coding efficiency is relatively high.

Description

technical field

[0001] The invention relates to the field of video image coding, in particular to a motion vector coding method and device. Background technique

[0002] The block-based motion vector coding technology is one of the core technologies of the block-based hybrid discrete cosine transform video coding standard.

[0003] Existing block-based motion vector coding methods, such as traditional H.263 and H.264 coding methods, firstly find the median value of the motion vectors of multiple encoded coding blocks adjacent to the coding block from the space or time domain, As the prediction of the motion vector of the coded block; then subtract the motion vector of the coded block from the motion vector of the coded block to obtain the difference of the motion vector of the coded block, and encode the difference of the motion vector of the coded block. In the above-mentioned existing encoding method, only the median value of a plurality of coded block motion vectors adja...

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