Enhancement type bi-directional motion vector predicting method in mixed video coding framework

Abstract

The invention discloses an enhancement type bi-directional motion vector predicting method aiming at interframe predictive coding in a mixed video coding framework, comprising the following steps of: (1) solving an alternative set containing a plurality of bi-directional motion vector prediction values through an prediction operator by comprehensively utilizing the time domain correlation and the space domain correlation of motion information for a current coding module; and (2) selecting an optimal motion vector prediction value from the alternative set by adopting a self-adaptation motion information prediction selection method to carry out subsequent coding computation and decoding computation as the motion vector prediction of the current coding module. The invention enhances the prediction accuracy of a final motion vector by comprehensively utilizing the correlated characteristics of the motion information on time domains and space domains and can independently complete on coding and decoding ends without detuning by utilizing a self-adaptation selection technology based on a prediction coding block SAD standard, thereby enhancing the compressive property of the bi-directional interframe predictive coding and being widely used for the field of mixed video communication.

Description

technical field [0001] The invention relates to video compression coding technology, in particular to an enhanced bidirectional motion vector prediction method in a hybrid video coding framework. Background technique [0002] In the hybrid video coding framework, an important feature is the use of block-based motion compensation / prediction mechanism to achieve inter-frame predictive coding. There is often a strong correlation between the motion information of adjacent blocks in the temporal and spatial domains of an image. The motion vector prediction mechanism of the current coded block using the motion vector of the coded block is an important technology in inter-frame coding. Accurate motion vector prediction can not only reduce the final prediction residual, but also reduce the side information related to the transmission of motion in the code stream. Therefore, to improve the compression efficiency of inter-frame coding, we should improve the motion vector prediction as...

AI Technical Summary

Problems solved by technology

[0020] Through the above analysis, it can be seen that the direct motion vector prediction method of the B block of H.264 / AVC utilizes the correlation of the time domain or the space domain of the motion information, but it cannot comprehensively apply the correlation of the time domain and the space domain at the same time.

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