Motion estimation method and device in video encoding, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a motion estimation method and device in video encoding, electronic equipment and a storage medium. The method comprises the following steps: acquiring video frame information of the current to-be-encoded block; obtaining a candidate motion vector set according to the video frame information; determining an initial motion vector from the candidate motion vector set based on a rate distortion criterion; taking a location pointed by the initial motion vector as a starting point, performing integer vector search based on the starting point in the preset search range, thereby obtaining the optimal motion vector after the integer pixel search is accomplished; taking a location pointed by the optimal motion vector as a center point, and performing sub-pixel point search on a direct upper direction, a direct lower direction, a direct left direction and a direct right direction; determining an optimal encoding cost based on the center point and the searched sub-pixel points; and determining an optimal matching point of the current to-be-encoded block after the motion estimation according to the pixel point corresponding to the optimal encoding cost.The video encoding efficiency can be improved through the method provided by the invention.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a motion estimation method, device, electronic equipment and storage medium in video coding. Background technique [0002] With the continuous development of multimedia digital video application technology and the continuous improvement of people's demand for video cloud computing, the existing transmission network bandwidth and storage resources can no longer bear the data volume of the original video source. Therefore, the compression of video signals has become a hot spot in industrial applications. Video compression, also known as video coding, aims to eliminate redundant information between video signals. The mainstream video coding standards all adopt the hybrid coding framework of "block-based prediction and transformation", that is, the input video signal is processed by coding techniques such as prediction, transformation, quantization, scanning, and entrop...

AI Technical Summary

Problems solved by technology

[0005] The motion estimation method in the prior art uses both integer pixel and sub-pixel search methods to search for the best prediction reference block. When the matching point of the integer-pixel search has reached the best, the sub-pixel search will still continue. When searching for sub-pixels, it is necessary to continuously interpolate the sub-pixels to obtain sub-pixels with lower precision, which has high computational complexity and will reduce the overall coding speed of video coding

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