Codec method and codec

Abstract

Provided in the embodiments of the present invention are a method and a device for encoding and decoding, the encoding method comprising: determining the current brightness encoding block in a texture image; determining the coordinates of the brightness-sampling point at the top-left of said brightness encoding block, said coordinates serving to indicate the position of the brightness-sampling point at the top-left of the brightness encoding block relative to the brightness-sampling point at the top-left of the texture image; obtaining the disparity vector between a reference viewpoint and the current viewpoint corresponding to the texture image; determining, on the basis of the disparity vector and of the x-coordinate of the brightness-sampling point at the top-left of the brightness encoding block, the x-coordinate of the target sampling point of the depth map corresponding to the reference viewpoint; determining the y-coordinate of the brightness-sampling point at the top-left of the brightness encoding block as the y-coordinate of the target sampling point of the depth map; determining, on the basis of the x-coordinate and the y-coordinate of the target sampling point of the depth map, and of the size of the brightness encoding block, the depth value information corresponding to all the sampling points of the brightness encoding block; obtaining, on the basis of the depth value information, a partitioning mode for the brightness encoding block, and partitioning the brightness encoding block; encoding the brightness encoding block so partitioned. Use of the encoding method of the embodiments of the present invention enhances encoding efficiency.

Description

technical field [0001] Embodiments of the present invention relate to the field of video image coding and decoding, and more specifically, relate to a coding and decoding method and a codec. Background technique [0002] In the video coding and decoding framework, hybrid coding structures are usually used for the coding and decoding of video sequences. The coding end of the hybrid coding structure usually includes: prediction module, transformation module, quantization module and entropy coding module; the decoding side of the hybrid coding structure usually includes: entropy decoding module, inverse quantization module, inverse transformation module and prediction compensation module. The combination of these encoding and decoding modules can effectively remove the redundant information of the video sequence, and can ensure that the coded image of the video sequence is obtained at the decoding end. [0003] In the framework of video coding and decoding, images of a video s...

AI Technical Summary

Problems solved by technology

However, since the depth encoding of the current viewpoint has not yet started, it is impossible to directly obtain the depth value information corresponding to each sampling point in the current brightness coding block from the depth map corresponding to the texture map of the current viewpoint. Therefore, it is necessary to use the disparity vector (DV, disparity vector) obtains the depth value information corresponding to each sampling point in the current luma coding block from the depth map corresponding to the coded reference viewpoint (such as image 3 As shown), due to the disparity between viewpoints, the process of finding the depth value information of each sampling point in the brightness coding block of the current viewpoint from the depth map corresponding to the reference viewpoint requires a large number of Clip and shift operations, which reduces the coding efficiency. efficiency

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