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Multi-view video bit rate control method based on sensing

A multi-viewpoint video and bit rate control technology, which is applied in digital video signal modification, television, electrical components, etc., can solve the problem that the bit rate control accuracy is not high enough, the special structure of layered B frames is not considered, and human vision is not fully considered Features and other issues

Inactive Publication Date: 2013-04-03
NINGBO UNIV
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Problems solved by technology

[0003] At present, some scholars have proposed the rate control of multi-view video coding based on the JMVC platform, but they did not consider the special structure of the layered B frame, and did not fully consider the visual characteristics of the human eye. The rate control accuracy of this encoding is not enough High, the stability of the encoded video quality is not high enough, and the quality of the visually sensitive area is not high enough

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  • Multi-view video bit rate control method based on sensing
  • Multi-view video bit rate control method based on sensing
  • Multi-view video bit rate control method based on sensing

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Embodiment Construction

[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0062] A perception-based multi-viewpoint video code rate control method proposed by the present invention, its overall realization block diagram is as follows figure 1 As shown, by performing rate control on the four layers of viewpoint layer, picture group layer, frame layer, and macroblock layer respectively, at the viewpoint layer, the way of precoding a picture group is used to determine the bit allocation between each viewpoint; At the picture group layer, calculate the target number of bits and initial quantization parameters of the picture group according to the structural characteristics of the hierarchical B frame; at the frame layer, determine the target number of bits per frame according to the predicted complexity; The rate-distortion model is modified to determine the bit allocation for the macroblock.

[0063] figure 2 A sche...

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Abstract

The invention discloses a multi-view video bit rate control method based on sensing. The method is characterized in that bit rates of a view layer, an image group layer, a frame layer and a macro-block layer are respectively controlled, bit allocation of views is determined by pre-encoding an image group in the view layer, target bits and initial quantization parameters of the image group are calculated according to structural characteristics of layered frames B in the image group layer, target bits of each frame are determined according to predicted complexity in the frame layer, and bit allocation of macro-blocks is determined according to a visual perception characteristic modification rate distortion model in the macro-block layer. The method has the advantages that the stability of video quality and the quality of a visual sensitive area are effectively improved by the bit rate control method, the peak signal-to-noise ratio of the most visually sensitive area is increased by 0.18-0.54dB, and subjective effects are obviously improved.

Description

technical field [0001] The invention relates to a multi-viewpoint video code rate control technology, in particular to a perception-based multi-viewpoint video code rate control method. Background technique [0002] Multi-viewpoint video is a group of video signals obtained by shooting the same scene from multiple cameras from different viewpoints. It can provide users with viewpoint selection and scene interaction to meet people's visual needs for stereoscopic effect and authenticity. As the development direction of the new generation of network multimedia, it will be applied in fields such as free-viewpoint video, stereoscopic TV, stereoscopic video conferencing, and multi-viewpoint video-on-demand. However, the huge data volume of multi-view video has become a bottleneck restricting its wide application. Therefore, the joint video team (JVT, Joint Video Team) proposed the concept of multi-view video coding MVC (Multi-view Video Coding), and then it It also released the j...

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N13/00H04N19/146H04N19/147H04N19/597
Inventor 蒋刚毅廖义郁梅彭宗举邵枫
Owner NINGBO UNIV
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