Coding-decoding method, and coder-decoder

Abstract

An embodiment of the present invention provides a coding-decoding method, and a coder-decoder. The coding method includes steps as follows: determining a present luminance coding block from a texture diagram; determining coordinates of an upper left luminance sampling point of the luminance coding block, wherein, the coordinates are used for indicating a position of the upper left luminance sampling point of the luminance coding block relative to the upper left luminance sampling point of the texture diagram; obtaining a display vector between the present viewpoint corresponding to the texture diagram and a reference viewpoint; determining an X coordinate of a target sampling point of a depth diagram corresponding to the reference viewpoint according to an X coordinate and a display vector of the upper left luminance sampling point of the luminance coding block; determing a Y coordinate of the upper left luminance sampling point of the luminance coding block as a Y coordinate of the target sampling point of the depth diagram; determining the depth information corresponding to various sampling points of the luminance coding block according to the X coordinate and the Y coordinate of the target sampling point of the depth diagram, and the size and the luminance coding block; obtaining a block dividing method of the luminance coding block according to the depth information, and dividing the luminance coding block; and decoding the divided luminance coding block. The coding method can increase coding 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 luminance 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

Images