Depth map encoding/decoding method based on different sampling blocks

Abstract

The invention relates to a depth map encoding / decoding method based on difference sampling blocks, and belongs to the technical field of the depth map in the three-dimensional video encoding standard.The method comprises the edge detection, macro block segmentation, intra-frame prediction mode selection, intra-frame multi-resolution macro block mode encoding and decoding end; the block reconstruction is performed on the decoded code stream, and the upper sampling processing is performed on the reconstructed block according to an encoding rule. The depth map encoding / decoding method has the advantage that a depth map encoding method based on different sampling blocks for the feature that the depth map only contains object contour information, a good prediction result is acquired by performing self-adaptive geometric division on the depth macro block containing discontinuous motion fields, thereby improving the depth map encoding efficiency, and reducing the complexity of the depth mapencoding.

Description

technical field [0001] The invention belongs to the technical field of depth image encoding in the three-dimensional stereoscopic video encoding standard, and relates to an encoding and decoding method for improving the encoding efficiency of the depth image. Background technique [0002] As the main video application technology in the future, 3D stereoscopic video means that users can enjoy real 3D stereoscopic video content through a 3D stereoscopic video display device. Technologies related to 3D video, such as 3D stereoscopic video acquisition, 3D stereoscopic video coding, and 3D stereoscopic video display, have received extensive attention. Among them, the depth information consists of the depth value of the pixel position in the color image, so the depth sequence compression usually treats it as a grayscale video for compression. In the application of 3D video system and free viewpoint video system, the data transmission is composed of a series of color texture video...

AI Technical Summary

Problems solved by technology

In fact, the existence of these discontinuous regions makes traditional video coding schemes less efficient, because traditional video coding schemes are usually used to deal with low-pass video signals. If traditional video coding schemes are used to encode depth sequences, It will produce obvious blocky artifacts in the discontinuity and smooth areas of the depth image in the depth sequence, which will lead to a decrease in the quality of the decoded depth sequence. In addition, since the decoded depth sequence is not directly used for display, and It is used to draw the virtual viewpoint, so the degraded depth map will cause the position of the synthesized viewpoint to be distorted, affecting the subjective and objective effects of the virtual viewpoint, so the compression of the depth sequence has become one of the main problems in academic research.

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