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Method and system of adjusting chromaticity balance and quantization parameters

A technology of quantization parameters and adjustment methods, applied in the field of video coding and decoding, which can solve the problems of wasting bits and no design of different video information sources.

Active Publication Date: 2014-09-03
深圳市梦网视讯有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to propose a chroma equalization quantization parameter adjustment method, which aims to solve the problems in the prior art that the spatial sampling rate of luminance and chrominance information is not specially designed for different video information sources. tends to waste extra bits on chroma

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  • Method and system of adjusting chromaticity balance and quantization parameters
  • Method and system of adjusting chromaticity balance and quantization parameters
  • Method and system of adjusting chromaticity balance and quantization parameters

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Embodiment 1

[0060] figure 1 It is a flow chart of a method for adjusting chroma equalization quantization parameters in a preferred embodiment of the present invention; the method includes the following steps:

[0061] S101: Determine whether the current coded frame is the first frame, and if so, go to S102; otherwise, go to S103.

[0062] S102: Calculate the u chroma quantization parameter adjustment parameter and the v chroma quantization parameter adjustment parameter of the current encoding frame.

[0063] Specifically include the following steps ( figure 2 yes figure 1 The method flow chart specifically included in step S102):

[0064] S1021: Calculate brightness intensity variable.

[0065] Iny t =std(y t (i,j)-y t+1 (i,j))

[0066] Among them, y t (i, j) represents the luminance value of the i-th row j column of the current coded frame, and t represents the playback sequence number of the current coded frame; y t+1 (i, j) represents the luminance value of the next frame ...

Embodiment 2

[0098] image 3 It is a structural diagram of a chroma equalization quantization parameter adjustment system in a preferred embodiment of the present invention, and the system includes:

[0099] The first judging module is used to judge whether the current coded frame is the first frame, and if so, enter the chroma quantization parameter adjustment parameter calculation device; otherwise, enter the quantization parameter adjustment value calculation module.

[0100] The chroma quantization parameter adjustment parameter calculation device is used to calculate the u chroma quantization parameter adjustment parameter and the v chroma quantization parameter adjustment parameter of the current encoding frame.

[0101] The quantization parameter adjustment value calculation module is used to calculate the quantization parameter adjustment value.

[0102] The encoding module is configured to encode the current encoding frame by adjusting the value of the quantization parameter.

...

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Abstract

The invention discloses a method and a system of adjusting chromaticity balance and quantization parameters. According to the method provided by the invention, an increment of the chromaticity quantization parameter is adjusted through prejudgment of a balance degree of brightness and chromaticity, so that the purpose of improving the brightness rate-distortion performance is achieved. In addition, a scene detection step is provided in the method in an embodiment of the invention, so that the prejudgment of the balance degree of the brightness and the chromaticity can be carried out duly, and the self-adaptive adjustment of the chromaticity quantization parameter is achieved. Finally, optimization between improvement of the brightness rate-distortion performance and control of a calculated amount is implemented.

Description

technical field [0001] The invention relates to the field of video encoding and decoding, in particular to a method and system for adjusting chroma equalization and quantization parameters. Background technique [0002] In terms of visual characteristics, the sensitivity of the human eye to chromaticity is far lower than that of brightness. However, the conventional encoding technology is not specially designed for video information sources (such as commonly used YUV420, YUV422, etc.) with different spatial sampling rates for luminance and chrominance information. This makes it often wastes extra bits on chrominance in encoding. Contents of the invention [0003] The purpose of the embodiment of the present invention is to propose a chroma equalization quantization parameter adjustment method, which aims to solve the problem that the prior art has no special design for different video information sources on the spatial sampling rate of luminance and chrominance informatio...

Claims

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Application Information

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IPC IPC(8): H04N19/186H04N19/124H04N19/147
Inventor 洪婷
Owner 深圳市梦网视讯有限公司
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