Motion vector precision selection method and device based on adaptive motion vector precision

Abstract

The present invention discloses an adaptive motion vector accuracy-based motion vector accuracy fast selection method and device. According to the adaptive motion vector accuracy-based motion vector accuracy fast selection method and device, the sum of two-dimension orthogonal transformation absolute values corresponding to all pixels in a current prediction unit PU block is judged, and the size relations of related features of MVs (Motion Vector) corresponding to SATDint and SATDqter are judged, and therefore, the possibility of an IMV (Integer Motion Vector) can be predicted in advance, an unnecessary inter-frame prediction process can be avoided, and the computational complexity of a new generation of video encoding can be decreased under a condition that video subjective quality degradation is negligible, inter-frame prediction time can be greatly decreased, and encoding time can be saved. The method is simple and easy to implement and can facilitate the industrialized generalization of a new generation of video encoding standards.

Description

Technical field [0001] The invention belongs to the field of video coding, and in particular relates to a method and device for selecting motion vector accuracy based on adaptive motion vector accuracy. Background technique [0002] Adaptive Motion Vector Resolution (AMVR, Advanced Motion Vector Resolution) is in motion estimation. After 1 / 4 pixel precision motion estimation is completed, 1 / 4 pixel precision motion estimation will increase the number of bits, although the distortion may be reduced However, the overall RDcost (rate-distortion cost) has not been reduced, so it is necessary to perform an entire pixel motion estimation again and compare it with the previously obtained optimal MV (motion vector), and take the smallest RDcost as the final optimal MV . The re-executed integer pixel motion estimation is called IMV (Integer Motion Vector, integer motion vector). Recently, the formulation of a new generation of video coding standards has introduced a large number of new ...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the defect of low coding efficiency of the new generation of video, the present invention proposes a motion vector precision selection method and device based on adaptive motion vector precision, which skips unnecessary inter-frame prediction by predicting the possibility of IMV in advance In the process of ensuring that the subjective quality of the video is negligible, the computational complexity of the encoder is reduced, the encoding time is reduced, and the encoding efficiency is improved.

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