Quick decision method for 3D video depth image quad-tree encoding structure division

Abstract

The invention discloses a quick decision method for 3D video depth image quad-tree encoding structure division. The method comprises the following steps: firstly, obtaining the current encoding blockand an optimal prediction mode of the first small auxiliary encoding block thereof and a corresponding rate-distortion value through a traditional encoding method; and then judging whether the optimalmode of the first small auxiliary encoding block is the Skip mode, if the optimal mode is the Skip mode, further judging whether the rate-distortion value of the current encoding block is less than or equal to 4 times of the first small auxiliary encoding block rate-distortion value, if the rate-distortion value of the current encoding block is less than or equal to 4 times of the first small auxiliary encoding block rate-distortion value, terminating the current encoding block in advance to obtain the quad-tree encoding structure division. Through the quick decision method disclosed by the invention, the complexity of the intra-frame prediction encoding of the depth image is reduced, the encoding time required by the prediction is reduced, and the video quality of the final decoding endsynthetic visual angle is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of video encoding and decoding, in particular to a fast decision-making method for 3D video depth image quadtree encoding structure division. Background technique [0002] The emerging video format of multi-view plus depth map is the most important format of the next generation 3D video system. It uses texture map information of a small number of viewpoints and additional depth map information of corresponding viewpoints to represent a 3D video scene, and more viewpoint information can be synthesized by 3D rendering technology based on depth images. Since the depth map plays a key role in providing disparity information and guiding the synthesis process in current 3D video systems, the research on depth map coding has important practical significance. [0003] Depth image coding in 3D-HEVC allows coding units such as figure 1 In the shown recursive quadtree structure division, the serial number at the cent...

AI Technical Summary

Problems solved by technology

[0005] All in all, the existing depth map fast coding technology does not fully consider the characteristics of the extremely small rate-distortion value when the Skip mode is selected as the optimal mode in different division depths, and the existing depth map mode selection algorithm Complexity still needs to be reduced

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