VCC coding unit rapid division method based on space-time depth information

Abstract

The invention provides a VCC coding unit rapid division method based on space-time depth information, which comprises the following steps: performing quadtree division on a CU of a maximum coding unit, and performing multi-type tree division after the quadtree division is ended; when the quadtree division depth of the maximum coding unit is 2 and the average depth of the space-time adjacent CUs is smaller than 2, quadtree division is terminated; when the quadtree division depth of the maximum coding unit is 3 and the average depth of the space-time adjacent CUs is less than 3, quadtree division is terminated; when the quadtree division depth of the maximum coding unit is between 2 and 4, the CU performs multi-type tree division; when the multi-type tree division depth of the maximum coding unit is 0 and the space-time adjacent average depth is less than 0.1, the CU does not need multi-type tree division, and otherwise, all division modes are traversed; and an optimal prediction mode is decided according to the rate distortion cost. According to the method, 35.72% of coding time can be saved averagely, and the average bit rate is increased less under the same coding quality.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method for quickly dividing VCC coding units based on spatio-temporal depth information. Background technique [0002] With the increasing demand for high-definition video, more and more video coding standards have emerged, such as H.264 / AVC and H.265 / HEVC. However, the compression ratios achievable by these standards cannot keep up with the rapid growth of video data demands. Therefore, the research and standard formulation of the next-generation ultra-high-definition video coding technology has become very urgent. At present, the widely used video coding standard H.265 / HEVC in the video field cannot meet the needs of practical applications. In this case, the new generation of video The coding standard H.266 / VVC came into being. [0003] HEVC is the predecessor of high-efficiency video coding (versatile video coding, VVC). HEVC adopts a quadtree coding structure...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem of high computational complexity of the existing VCC method, the present invention proposes a fast division method of VCC coding units based on spatio-temporal depth information, which removes redundant calculations in the CU partition, and without affecting the coding performance, Has lower computational complexity, reduces unnecessary rate-distortion optimization operations, and significantly speeds up encoding

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