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Brightness and chrominance balanced coding and decoding method, system and device

An encoding method and chroma technology, applied in the field of video encoding and decoding, which can solve the problem that the visual effect of the encoding strategy is not obviously improved.

Active Publication Date: 2013-04-03
深圳市梦网视讯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to propose a method and system for luminance and chroma equalization coding, which aims to solve the problem that the visual effect of the coding strategy in the prior art is not obvious.

Method used

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  • Brightness and chrominance balanced coding and decoding method, system and device
  • Brightness and chrominance balanced coding and decoding method, system and device
  • Brightness and chrominance balanced coding and decoding method, system and device

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Embodiment 1

[0059]figure 1 It is a flow chart of a method for luminance and chromaticity equalization coding of the present invention; the coded image in the embodiment of the present invention is an n-bit map (n-bit map means that each pixel of the image is represented by n bits of unsigned integer); all pixels of the coded image The luminance values ​​of all pixels constitute the luminance information of the coded image, the U chrominance values ​​of all pixels constitute the U chrominance information of the coded image, and the V chrominance values ​​of all pixels constitute the V chrominance information of the coded image;

[0060] The method comprises the steps of:

[0061] S100: Initialization: t=1, note u =0, note v =0.

[0062] Among them, t represents the current encoding frame frame t code serial number;

[0063] note u Indicates the U chrominance information precompression flag of the current encoded frame,

[0064] note v Indicates the V chrominance information precompr...

Embodiment 2

[0200] image 3 It is a structural diagram of a luminance and chroma equalization coding system according to an embodiment of the present invention; the system includes:

[0201] initialization module, pre-compression device, encoding processing module,

[0202] Initialization module: connected with the pre-compression device, used to initialize the encoding sequence number of the current encoding frame, the U chrominance information pre-compression sign of the current encoding frame, and the V chrominance information pre-compression sign of the current encoding frame;

[0203] Pre-compression device: connected with the initialization module, encoding processing module and scene judgment processing module, for rooting the strength of the chrominance information of the current encoding frame and the pre-compression flag of the chrominance information to the U chrominance information and / or V color of the current encoding frame Degree information is pre-compressed;

[0204] En...

Embodiment 3

[0345] Figure 7 It is a flow chart of a method for luminance and chroma equalization decoding according to an embodiment of the present invention; the method includes the following steps:

[0346] S701: Initialize t=1.

[0347] t represents the decoding sequence number of the current decoding frame.

[0348] S702: stream data of the current decoded frame Decode and get the current decoded frame

[0349] S703: Perform post-restoration processing or post-enhancement processing on the U chrominance information and / or V chrominance information of the current decoded frame according to the U chrominance information precompression flag and the V chrominance information precompression flag in the decoded frame stream data;

[0350] Further, the described luminance and chrominance equalization decoding method may also include the following steps,

[0351] S704: Determine whether the stream data of the next frame to be decoded exists, if yes, set the stream data of the next fra...

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Abstract

The invention discloses a brightness and chrominance balanced coding and decoding method, system and device. The brightness and chrominance balanced coding and decoding method is characterized in that chrominance information is pre-compressed at the coding end and code streams saved in chrominance are distributed on brightness having the largest effect on the visual effect, and accordingly the brightness rate distortion performance is improved; the reducing range of the brightness rate distortion performance is controlled to not affect the visual effect through chrominance information post-recovery at the decoding end, or the subjective effect is improved through chrominance information post-enhancement. Therefore, improvement of the subjective and objective performances of the coding and decoding technology is finally achieved.

Description

technical field [0001] The present invention relates to the field of video encoding and decoding, in particular to a brightness and chrominance equalization encoding and decoding method, system and equipment. Background technique [0002] In video coding and decoding, the luminance and chrominance information of the video information source in YUV420 format are generally different in spatial sampling rate. The design strategy of conventional video compression technology is: in the inter-frame coding frame, generally only the luminance component is searched for motion. , the motion vector of the chroma component is directly taken from the luminance component of the corresponding area; in the sub-pixel domain, due to the difference in spatial sampling rate, for the motion vector of the same precision, the chroma component must be interpolated once more than the luminance component, which leads to The spatial distribution of the chrominance components is relatively smooth; in a...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N11/04H04N19/147H04N19/186H04N19/85
Inventor 洪婷
Owner 深圳市梦网视讯有限公司
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