Color degree compensating process and apparatus

A chromaticity compensation and chromaticity technology, which is applied in the field of video codec, can solve problems such as inability to match the current encoding

Inactive Publication Date: 2008-12-31
SNAPTRACK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In MVC, an inter-view reference frame is introduced as a prediction. At this time, the reference frame and the current coded frame are still mismatched. In the case of multi-view, this mismatc...

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  • Color degree compensating process and apparatus
  • Color degree compensating process and apparatus
  • Color degree compensating process and apparatus

Examples

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Embodiment Construction

[0057]The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the drawings and embodiments.

[0058] If the values ​​of the current coded frame are Yc, Cbc, Crc, and the values ​​of the reference frame are Yr, Cbr, Crr, then the main means to improve the coding efficiency is to eliminate the difference between the reference frame Ref and the current frame Cod, that is, to adjust Yr, Cbr, The value of Crr is as close as possible to the value of Yc, Cbc, Crc.

[0059] The chroma compensation method in the embodiment of the present invention specifically includes the following steps when performing entropy encoding:

[0060] Step 201, using the values ​​of the three chroma RGB values ​​of the current frame of the input image and the values ​​of the three chroma RGB values ​​of the original reference frame to perform weighted calculations to obtain ratio coefficients Kr, Kg and Kb;

[0061] Kr is the ratio of...

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Abstract

The inventive embodiment relates to a chrominance compensation process, including: performing weighting forecast processing to luminance component and two chrominance components of the original reference frame; and generating the values of the luminance component and two chrominance components of the weighting reference frame. The inventive embodiment also relates to a chrominance compensation device, including: a processing module, for performing weighting forecast processing to luminance component and two chrominance components of the original reference frame; and a generating module, for generating the values of the luminance component and two chrominance components of the weighting reference frame. The inventive embodiment also relates to a chrominance compensation device, including: a first compensation module, for performing weighting compensation to a luminance value Y; a second compensation module, for performing weighting compensation to a first chromatic value U; a third compensation, for performing weighting compensation to a second chrominance value V; and an adder. Therefore, the chrominance compensation process and device of the inventive embodiment uses weighting forecast to perform chrominance compensation to color mismatch existing between reference frames of views to reduce code rate.

Description

technical field [0001] Embodiments of the present invention relate to the field of video coding and decoding, in particular to a chroma compensation method and device. Background technique [0002] With the development of multimedia communication technology, people are no longer satisfied with traditional fixed viewpoint vision and 2D plane vision, especially in many application fields such as entertainment, education, tourism and surgery, there is a demand for free viewpoint video and 3D video. For example, Free Viewpoint TV (FTV), which allows the viewer to choose a viewing angle, and 3DTV, which plays videos from different viewing angles for viewers in different positions. These technologies all require the use of multiple cameras to acquire video signals of the same scene at different spatial positions and angles at the same time, and compress, encode and transmit a group of video signals obtained. This group of videos is called multi-view video, and the process of comp...

Claims

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Application Information

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IPC IPC(8): H04N9/77H04N7/26H04N19/105H04N19/42H04N19/51H04N19/625H04N19/91
Inventor 林四新霍俊彦杨海涛常义林熊联欢
Owner SNAPTRACK
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