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A deep video rate control method based on a region adaptive model

An adaptive model and rate control technology, applied in the field of 3D video coding, to achieve the effect of improving accuracy and coding efficiency

Active Publication Date: 2018-05-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the current situation that most of the existing code rate control models are built for color video, and proposes a depth video code rate control method based on a region adaptive model for depth video to improve the coding efficiency of depth video. See the following description for details:

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  • A deep video rate control method based on a region adaptive model
  • A deep video rate control method based on a region adaptive model
  • A deep video rate control method based on a region adaptive model

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Embodiment 1

[0027] In order to overcome the deficiencies of the existing technology, accurately realize the code rate control algorithm of the depth video, and improve the quality of the drawn virtual viewpoint, the embodiment of the present invention proposes a depth video code rate control method based on a region adaptive model, and a specific technical solution Divided into the following steps:

[0028] 101: Divide the area of ​​the depth video into the area IBV that has a greater influence on drawing the virtual viewpoint, and the remaining areas are the area NIBV that has less influence on the drawing of the virtual viewpoint; wherein, the area IBV is: the boundary of the object and the area of ​​violent movement,

[0029] 102: Establish an R-λ model based on regional IBV and regional NIBV; calculate the initial parameters of the R-λ model;

[0030] 103: Determine the optimal bit allocation of the area IBV and the area NIBV based on the code rate control method of the area R-λ model...

Embodiment 2

[0045] The scheme in embodiment 1 is introduced in detail below in conjunction with specific calculation formulas and examples, see the following description for details:

[0046] 201: Region division of depth video;

[0047] The boundaries of objects in the depth map and areas of severe motion have a great impact on the quality of rendering virtual viewpoints. In order to improve the quality of rendering the virtual view, the embodiment of the present invention divides the input depth map based on 8×8 blocks into areas that have a greater influence on the rendering of the virtual view (Interested Blocks for Virtual view rendering, IBV) and areas that have an impact on the rendering of the virtual view. Smaller area (Not Interested Blocks for Virtual view rendering, NIBV) two areas. Specifically, IBV consists of two parts: the boundary of the object and the region of severe motion, and the rest is NIBV.

[0048] The boundary of the object is detected by the canny operator. W...

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Abstract

The invention discloses a depth video code rate control method based on a region self-adaptive model. The control method comprises the following steps: dividing a region of a depth video into a region IBV with great influence on virtual viewpoint drawing, and region NIBV with small influence on the virtual viewpoint drawing, wherein the region IBV is the boundary and a drastic motion region of an object; establishing a R-lambda model based on the region IBV and the region NIBV; computing an initial parameter of the R-lambda model; determining an optimal bit distribution of each of the region IBV and the region NIBV based on a code rate control method of the region R-lambda model, and resolving the optimal bit distribution. By use of the code rate control method disclosed by the invention, the accuracy of the depth video code rate control and the subjective quality and objective quality of the virtual viewpoint drawing are improved, and the encoding efficiency of the depth video is promoted.

Description

technical field [0001] The invention relates to the field of 3D video coding, in particular to a code rate control method for deep video based on an area adaptive model. Background technique [0002] Rate control plays an important role in the transmission of high-quality 3D video over the channel. The basic principle of rate control is to dynamically adjust the encoding parameters of the encoder according to a certain encoding strategy, and finally adjust the number of bits output by the encoder in unit time through optimal allocation of bit rates at each level, so that the actual output bit rate and The target bit rate is the same. There have been many studies on bit rate control. Each video coding standard has formulated a corresponding bit rate control algorithm model. According to different applications and standards, different bit rate control algorithms and models are used correspondingly. In addition to the methods integrated in the video coding standard, researche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/00H04N19/149H04N19/19
CPCH04N13/10H04N13/128H04N19/149H04N19/19H04N2013/0081
Inventor 雷建军贺小旭元辉何景逸孙振燕侯春萍
Owner TIANJIN UNIV