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A visual point difference estimate/compensation method in multi-visual point video coding

A technology of multi-viewpoint video and compensation method, applied in the field of viewpoint difference compensation in multi-viewpoint video coding

Inactive Publication Date: 2010-12-08
SNAPTRACK
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  • Application Information

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Problems solved by technology

[0009]The main problem with this technique is that it can only approximately reflect the average depth characteristics of all objects in the image, but cannot accurately reflect the depth characteristics of each object in the image. depth features
When each object in the image has significantly different depth features, such as Figure 1 The dancers and the audience in the stands have different depth features, and the estimated global viewpoint difference cannot accurately reflect the viewpoint difference of each object in the image
In this case, for the macroblocks in some objects in the image, there are cases where the matching block cannot be found within the set search range after using the global viewpoint difference compensation, which will seriously affect the coding efficiency of multi-viewpoint video

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  • A visual point difference estimate/compensation method in multi-visual point video coding
  • A visual point difference estimate/compensation method in multi-visual point video coding
  • A visual point difference estimate/compensation method in multi-visual point video coding

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0049] The purpose of the present invention is to narrow the search range selected by the multi-viewpoint video coding method using the AVC processing framework when searching for DV, thereby reducing the amount of calculation and providing multi-viewpoint video coding efficiency. Its basic principle is as image 3 Shown:

[0050] Before using the AVC-compatible MV / DV prediction / compensation module 303 to perform viewpoint difference coding, the RDV estimation / compensation module 302 is added to pre-estimate DV, which is equivalent to dividing the view to be coded into several regions to be coded, And a more accurate DV prediction initial value, ie, RDV, is provided for each region to be coded. Formula (2) reflects the relationship between the regional viewpoint differe...

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Abstract

The method for estimating / compensating viewpoint difference (VD) includes following steps: (1) based on depth character of object in image to be encoded to divide the image to be encoded into more than one region and to determine vector of regional VD for each region; (2) according to principle of minimized match error to calculate the correction vector for VD by using vector of regional VD as a searching initial point; (3) compensating the correction vector for VD to obtain final vector for correcting VD. Features are: small amount of calculation is needed to estimate vector for VD of each viewpoint image; using vector of regional VD as an initial point of fine DV search to carry out fine DV search can use smaller search window so as to reduce needed amount of calculation for encoder to search DV greatly so as to raise encoding speed.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to multi-viewpoint video coding technology, in particular to a viewpoint difference compensation method in multi-viewpoint video coding. Background technique [0002] With the development of multimedia technology, people are no longer satisfied with the traditional fixed viewpoint vision and 2-dimensional (2D) plane vision. In many application fields such as entertainment, education, sightseeing and surgery, there have been free viewpoint video and 3D ( 3D) stereoscopic video requirements. For example, Free view-point Television (FTV), which enables the viewer to select a viewing angle, and 3-dimensional TV (3Dimensional Television, 3DTV), which plays videos of different viewing angles for viewers in different positions. [0003] Multi-view video coding (Multi-view Video Coding, MVC) is a key technology to realize free-viewpoint video and 3D video applications. Group...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/50H04N19/51H04N19/56H04N19/597H04N19/61
Inventor 林四新杨海涛霍俊彦常义林熊联欢
Owner SNAPTRACK