Fast motion estimation video encoding method based on motion vector distribution forecast

Abstract

The invention belongs to the field of video compression encoding and discloses a fast motion estimation video encoding method based on motion vector distribution forecast. The fast motion estimation video encoding method comprises the following steps of: firstly extracting brightness information of a current macroblock from original video data, designing a concise motion estimation search template aiming at integer-pixel motion vector distribution characteristic search, reasonably distributing search points, then forecasting motion vector distribution, and self-adaptively selecting to carry out small-scale search in a corresponding area of the search template according to a forecasting result; and judging whether a motion vector is 0 in the motion estimation search process and taking the motion vector as a criterion of skipping template search. Compared with a motion estimation search algorithm and other improved algorithms adopted in a H.264 video encoding standard, the fast motion estimation video encoding method disclosed by the invention can be used for effectively accelerating the motion estimation search process, shortening the time spent on motion estimation, strictly controlling the increase of code rate, ensuring the better quality of a reconstructed image and achieving the fast motion estimation coding.

Description

technical field [0001] The invention belongs to the field of video compression coding, and relates to a video fast motion estimation coding method based on motion vector distribution prediction. Background technique [0002] In 2003, the International Telecommunication Union (ITU-T) and the International Organization for Standardization (ISO / IEC) jointly promulgated and proposed a new generation of video coding standard H.264 / AVC. The excellent compression performance and video quality of H.264 make it widely used in real life, including digital TV broadcasting, multimedia short message, network video streaming media transmission and video real-time communication, etc. Compared with the previous coding standards, H.264 has been improved in the following aspects: motion estimation with 1 / 4 pixel precision; support for 16×16, 16×8, 8×l6, 8×8, 8×4, 4×8, 4×4, 7 kinds of block prediction methods; support multi-frame reference; use 4×4 integer transformation instead of 8×8 DCT tr...

AI Technical Summary

Problems solved by technology

[0008] The technical solution adopted in the present invention is: a fast motion estimation video coding method based on motion vector distribution prediction, for the shortcoming of a waste of search points in a large-scale search template, for asymmetric cross-shaped search templates and non-uniform hexagonal grid search templates A redesign is carried out, and the motion vector distribution prediction is performed before the asymmetric cross search and the non-uniform hexagonal grid search respectively, and the corresponding search area is adaptively selected, and whether the motion vector is judged to be 0 during the search is added in advance Termination criterion, and then realize the fast motion estimation video coding of interframe macroblock, it is characterized in that specifically comprising the following steps:

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