Intraframe coding method, device and encoder for depth images

An intra-frame coding and depth image technology, which is applied in the field of video coding and decoding, can solve the problems of improving the quality of synthetic viewpoints and the code rate occupied by coded depth blocks, so as to reduce the code rate, improve the coding performance, and improve the codec efficiency.

Inactive Publication Date: 2014-01-22
LG ELECTRONICS (CHINA) R&D CENT CO LTD
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[0004] In summary, in the above two cases, the residual of the coded depth block n

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  • Intraframe coding method, device and encoder for depth images
  • Intraframe coding method, device and encoder for depth images

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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] In order to solve this problem, the embodiment of the present invention proposes that in the depth image intra-frame coding mode, the residual of the depth image may not be coded, and the encoder passes rate-distortion optimization between non-all-zero residuals and all-zero residuals ( rate distortion optimized) option determines whether to encode residuals.

[0030] Such as figure 1 As shown, it is a flowchart of a depth image intra-frame coding meth...

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Abstract

Provided are an intraframe coding method, device and encoder for depth images. The method is applied to 3D video coding or multi-view video coding. The method comprises: in an intraframe coding mode for the depth images, generating a non-all-zero residual and an all-zero residual when a prediction unit is coded; and selecting rate-distortion optimization between the non-all-zero residual and the all-zero residual so as to be used as the residual coding scheme of the prediction unit. The device is applied to 3D video coding or multi-view video coding. The device comprises: a residual generation unit used in an intraframe coding mode for depth images, for generating a non-all-zero residual and an all-zero residual when a prediction unit is coded; and a rate-distortion optimization selecting unit used for selecting rate-distortion optimization between the non-all-zero residual and the all-zero residual so as to be used as the residual coding scheme of the prediction unit. By adopting the method, device and encoder provided by the invention, the code rate required for coding depth images is reduced, and the coding performance is increased.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a depth image intra-frame encoding method, device and encoder. Background technique [0002] In 3D video coding or multi-view applications, depth images can be used to provide more flexible views. Depth information is different from texture information. It is not used for direct display, but is first converted into disparity vector, and then used together with texture information to generate a synthetic viewpoint. [0003] In the process of generating a synthetic view, the distortion of the depth block has little effect on the distortion of the synthetic view in the following two cases: 1. The distortion of the depth value does not cause the distortion of the disparity information, 2. The area near the texture value corresponding to the current depth value Very smooth. [0004] It can be seen from the above that in the above two cases, the residual o...

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Application Information

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IPC IPC(8): H04N13/00
CPCH04N19/597H04N19/11H04N19/147H04N19/172H04N19/593H04N19/65
Inventor 贾杰刘鸿彬
Owner LG ELECTRONICS (CHINA) R&D CENT CO LTD
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