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Coding method for multi-view depth video signals

A deep video and coding method technology, applied in the direction of digital video signal modification, image communication, electrical components, etc., can solve the problems of complex video signal coding and calculation

Active Publication Date: 2015-03-25
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0005] Based on this, it is necessary to provide a low-complexity multi-view depth video signal coding method for the computationally complex problem of video signal coding

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  • Coding method for multi-view depth video signals

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Embodiment Construction

[0047] Multi-view depth video coding method based on H.264 / AVC coding framework The variable-size block mode selection technology improves the prediction accuracy of motion / parallax estimation, thereby reducing the prediction residual and improving the compression ratio. Among them, the macroblock (Macroblock) mode can be mainly used Divided into two categories, inter mode (Inter Mode) and intra mode (Intra Mode). Inter-frame modes include direct mode (DIRECT / SKIP), 16×16, 16×8, 8×16, 8×8, 8×8Frext, among which 8×8 sub-macroblock mode is divided into sub-macroblock direct mode (sub -DIRECT), 8×4, 4×8 and 4×4 modes. Intra modes include Intra 16x16, Intra 8x8, Intra 4x4, and Differential Mode (PCM). The above encoding modes use Rate Distortion Optimization (RDO) technology to calculate the cost of encoding the current macroblock in each mode in an ergodic manner and compare the rate-distortion cost values. The encoding mode with the smallest rate-distortion cost is used as the ...

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Abstract

The invention discloses a coding method for multi-view depth video signals, the coding method is used for drawing redundancy, lowering the calculating complexity of depth video coding and improving the integral performance between the virtual view quality and the depth code rate and is low in complexity. Firstly, according to the virtual view drawing characteristics, the depth tolerable range is obtained, the maximum upper and lower limit differences corresponding to depth values are worked out, and redundancy information in the depth video is analyzed; secondly, a rapid reference frame selection method is put forward, an optimal reference frame is selected from a list, and an optimal coding mode is selected through the rapid mode. The rapid reference frame selection needs to be carried out before rapid mode selection every time, and when the distortion of the video is small by setting the threshold value T1 and the threshold value T2, the mode and reference frame selection is ended, and therefore the calculating complexity is lowered, and the compression performance is improved.

Description

technical field [0001] The invention relates to a video signal processing technology, in particular to a low-complexity multi-viewpoint depth video signal encoding method. Background technique [0002] 3D video can provide real depth perception characteristics, interactivity and new visual enjoyment, and can be widely used in a variety of multimedia applications, such as 3D TV (Three Dimensional TV, 3DTV), Free Viewpoint TV (Free viewpoint TV, FTV) and Immersive video conferencing virtual reality. Multi-view depth video is an important part of 3D video, which mainly provides geometric information of 3D video, and enables 3D video system to support high-quality and low-complexity arbitrary viewpoint rendering. In order to reduce the complexity of the video terminal, the multi-view depth video is not generated on the client side, but generated on the server side, and then transmitted to the client side for decoding after encoding. However, due to the huge amount of multi-vie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/00H04N19/597
Inventor 张云朱林卫张冠军
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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