A Multi-View Video Bit Rate Control Method Based on Just Perceivable Distortion

A multi-viewpoint video and bit rate control technology, applied in digital video signal modification, electrical components, image communication, etc., can solve problems such as no bit rate control scheme given, bit rate control is not very clear, etc., to reduce bit rate , the effect of high subjective quality

Inactive Publication Date: 2015-12-02
NINGBO UNIV
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Problems solved by technology

[0003] However, the bit rate control scheme has not been given in the MVC standard. Although the existing bit rate allocation or bit rate control methods for multi-viewpoint video have achieved certain results, how to more accurately base on the HumanVisionSystem (HumanVisionSystem) , HVS) for rate control is still unclear

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  • A Multi-View Video Bit Rate Control Method Based on Just Perceivable Distortion
  • A Multi-View Video Bit Rate Control Method Based on Just Perceivable Distortion
  • A Multi-View Video Bit Rate Control Method Based on Just Perceivable Distortion

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Embodiment Construction

[0066] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0067] A multi-viewpoint video rate control method based on just perceivable distortion proposed by the present invention, which implements the rate control through the viewpoint layer, picture group (GOP, groupofpictures) layer, frame layer and macroblock (MB, macro-block) layer Control, before the code rate control, it is necessary to calculate the perceivable distortion value according to the pixels of the color image, so as to adjust the target code rate allocation of the macroblock during the code rate control of the macroblock layer. Allocate the target number of bits for each GOP at the GOP layer, and determine the initial quantization parameter of the I frame or P frame in each GOP according to the average value of the initial quantization parameters of all B frames in the previous GOP. For B frames, at the frame layer The target numbe...

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Abstract

The invention discloses a multi-view video rate control method based on exactly perceptible distortion. An exactly perceptible distortion value can be obtained according to characteristics of visual system of human beings. Rate control is performed quantificationally in a multi-view video, namely, according to an frame I or frame P image, a quantization parameter is determined according to an average value of quantization parameters of frame B images of a last image set and according to a Frame B image, due to calculation of the number of target bits distributed to the Frame B image in advance and calculation of the number of the target bits distributed to each macro block of the Frame B image in advance, a mean absolute error of each macro block is corrected combined with the exactly perceptible distortion value. Then according to a secondary model of a code rate-quantization parameter, a quantization parameter of each macro block is calculated. According to the code control method, under the conditions that a control code rate is accurate and a peak signal to noise ratio is kept unchanged, higher subjective quality is obtained and when the corrected peak signal to noise ratio is regarded as a quality standard, the code rate of the multi-view video rate control method based on the exactly perceptible distortion is reduced by 10.31%-32.13%.

Description

technical field [0001] The invention relates to a multi-viewpoint video code rate control technology, in particular to a multi-viewpoint video code rate control method based on just perceivable distortion. Background technique [0002] With the rapid development and application of multimedia technology, multi-view video technology with 3D (ThreeDimensional) vision function is getting more and more attention from academia and industry. 3D multimedia has become the main driving force in the electronic consumer market. In addition, with mobile phones supporting stereoscopic display, 3D multimedia entering mobile devices has become a reality. In the multi-view video coding (MVC) standard, disparity compensation prediction and motion compensation prediction are used to remove various redundancies to improve coding efficiency. However, if the multi-view video technology is to be applied in practice, there are still many problems to be solved, and the rate control of multi-view vi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/597H04N13/00H04N19/61H04N19/567
Inventor 蒋刚毅郑巧燕郁梅朱高锋彭宗举邵枫
Owner NINGBO UNIV
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