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Depth view encoding rate distortion judgment method for virtual view quality

A depth map coding and virtual view technology, applied in the field of rate-distortion judgment criteria, can solve problems such as inaccurate parallax, achieve the effect of improving efficiency and increasing coding complexity

Inactive Publication Date: 2011-08-17
SHANDONG UNIV
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Problems solved by technology

In the compression process of the depth map, the distortion of the depth map itself does not necessarily cause the inaccuracy of the disparity; but when the depth map is completely accurate, the disparity is also completely accurate

Method used

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  • Depth view encoding rate distortion judgment method for virtual view quality
  • Depth view encoding rate distortion judgment method for virtual view quality
  • Depth view encoding rate distortion judgment method for virtual view quality

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Embodiment Construction

[0033] The method for judging rate-distortion of depth map coding oriented to virtual view quality in the present invention, such as figure 2 As shown, it specifically includes the following steps:

[0034] (1) Predict the current coding block of the depth map to obtain the predicted block of the current coding block, and the gray value of each pixel in the current coding block is represented by L i Indicates that the gray value of each pixel in the prediction block is represented by L p，i Denotes, i ∈ {1,...N}, N is the number of pixels in the current coding block. The method for predicting the current coding block of the depth map adopts various intra-frame or inter-frame prediction methods stipulated in the H.264 / AVC standard.

[0035] (2) put L i with L p，i Subtract to obtain the difference value of the current coding block, and perform discrete cosine transform, quantization, and entropy coding on the difference value to determine the code rate R of the current codin...

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Abstract

The invention discloses a depth view encoding rate distortion judgment method for virtual view quality. The method comprises the steps of performing predication on a current encoding block to obtain a predicated block; computing the difference between the current encoding block and the predicated block, and performing discrete cosine transform, quantification and entropy coding on the difference to obtain the code rate of the current encoding block; converting pixel gray values of the current encoding block and the predicated block into parallax values; then computing the distortion of the current encoding block according to the converted parallax values; and finally computing the rate-distortion cost of the current encoding block according to the distortion and the code rate. The method better reflects the influence on the composite virtual view quality by the compression distortion of a depth view according to the influence on the composite virtual view quality by the compression distortion of the depth view, improves the encoding code rate of three-dimensional video, and can be applied to the coding standard of three-dimensional videos.

Description

technical field [0001] The invention relates to a rate-distortion judgment criterion for improving coding efficiency of a depth map, and belongs to the technical field of depth map coding in three-dimensional stereo video coding standards. 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. In order to promote the standardization of 3D stereoscopic video technology, in 2002, the Motion Picture Experts Group (Motion Picture Experts Group, MPEG) proposed the concept of Free View Television (FTV). It can provide a vivid, real, interactive three-dimensional audio-visual system. The user can watch the three-dimensional video of the angle fro...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N7/64H04N19/147H04N19/19H04N19/597H04N19/89
Inventor 元辉刘琚孙建德
Owner SHANDONG UNIV
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