Fast decision-making method for 3D video depth image quadtree coding structure division

A technology of depth image and decision method, applied in the field of video coding and decoding, can solve the problems of reduced complexity of depth image mode selection algorithm and insufficient consideration of the minimum rate distortion value of Skip mode, so as to reduce coding complexity and reduce coding. time, the effect of reducing complexity

Active Publication Date: 2021-09-17
NANJING UNIV OF SCI & TECH
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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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  • Fast decision-making method for 3D video depth image quadtree coding structure division
  • Fast decision-making method for 3D video depth image quadtree coding structure division
  • Fast decision-making method for 3D video depth image quadtree coding structure division

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Embodiment

[0037] What this embodiment shows is a kind of fast decision-making method for the quadtree coding structure division of 3D video depth image, and its process is as follows figure 2 As shown, the steps include:

[0038] Step 1: Obtain the optimal prediction mode of the current coding block, the current coding block and the corresponding rate-distortion value through the traditional coding method;

[0039] Step 2: Determine whether the current coding block is the smallest coding unit: if yes, go to step 8; otherwise, go to step 3;

[0040] Step 3: Divide the current coding block into a quadtree structure, and repeat steps 4 to 7 for each obtained subsidiary coding block;

[0041] Step 4: Carry out the traditional coding method on the current auxiliary coding block, calculate the optimal prediction mode of the auxiliary coding block, and the corresponding rate-distortion value of the auxiliary coding block;

[0042]Step 5: If the current auxiliary coding block is the first on...

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Abstract

The invention discloses a fast decision-making method for 3D video depth image quadtree coding structure division. The method is: first obtain the optimal prediction mode of the current coding block and its first small subsidiary coding block, and the corresponding rate-distortion value through the traditional coding method; then determine the optimal mode of the first small subsidiary coding block Whether it is Skip mode, if so, further judge whether the rate-distortion value of the current coding block is less than or equal to 4 times the rate-distortion value of the first small subsidiary coding block, if so, terminate the quadtree coding structure of the current coding block in advance divided. The present invention reduces the complexity of intra-frame predictive encoding of depth images, reduces the encoding time required for prediction, and ensures the video quality of the synthesized view at the final decoding end.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/105H04N19/147H04N19/597H04N19/96H04N19/176
CPCH04N19/105H04N19/147H04N19/176H04N19/597H04N19/96
Inventor 伏长虹陈浩高梽强
Owner NANJING UNIV OF SCI & TECH
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