H.264 frame layer code rate control method based on structural similarity coefficient

A technology of structural similarity and control method, which is applied in the field of video coding, can solve the problems that the image does not necessarily conform to the subjective characteristics of the human eye, and the allocation of code rates without subjective characteristics, etc., so as to improve the average SSIM value, good subjective video quality, and improve Effect of SSIM value

Active Publication Date: 2013-08-07
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0007] The above method mainly allocates the code rate from the complexity of the natural image content, and there are some shortcomings: the code rate is allocated according to the objective characteristics of the image content, and the code rate is not allocated according to the subjective characteristics of the human eye, and the obtained image does not necessarily conform to the subjective characteristics of the human eye. characteristic

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  • H.264 frame layer code rate control method based on structural similarity coefficient
  • H.264 frame layer code rate control method based on structural similarity coefficient
  • H.264 frame layer code rate control method based on structural similarity coefficient

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Embodiment Construction

[0029] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0030] The frame layer code rate control method of H.264 of the present invention specifically comprises the following steps:

[0031] A, calculate the remaining number of bits of the i-th GOP layer uncoded frame according to the following formula:

[0032] T r ( n i , j ) = { u ( n i , 1 ) F ...

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Abstract

The invention relates to an H.264 frame layer code rate control method based on a structural similarity coefficient. The structural similarity theory is utilized for distributing the H.264 frame layer code rate. The method comprises the following steps that A, the target bit number of the remaining frame is calculated; B, the structural similarity coefficient is calculated; C, the target bit number of the current frame is determined according to the structural similarity coefficient; D, a quantization parameter is calculated; and E, rate-distortion optimization is carried out. The method is characterized in that the structural similarity coefficient is defined, and the target bit number of the frame is determined on the basis of the defined structural similarity coefficient. The H.264 frame layer code rate control method has the advantages that the code rate can be more accurately controlled, and in addition, the structural similarity of the video output sequence can be improved, so that the better subjective video quality is obtained.

Description

Technical field: [0001] The invention belongs to the technical field of video coding, and relates to an H.264 frame layer code rate control method based on structural similarity. Background technique: [0002] In the past ten years, video communication technology has been developed rapidly and widely used, and a series of video coding standards have been formulated. Existing international video coding standards mainly include MPEG-1, MPEG-2, MPEG-4 (see document: ISO / IEC13818-2.Information technology-Generic coding of moving pictures and associated audio Part2 : Video[S].1996; ISO / IEC14496-2.Information technology-Generic coding of audio-visual objects Part2:Visual[S].1998.), and the H. 26x series, such as H.261 (see document: ITU-T.Draft ITU-T Recommendation H.261.Video codec for audio visual services, at px64kbps[S], 1993.), H.263 (see document: ITU- T. Draft ITU-T Recommendation H.263. Video coding for low bit rate communication [S]. 1996.), etc. In 2003, the joint vid...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/50H04N19/146H04N19/70
Inventor 陈晓顾冬珏
Owner NANJING UNIV OF INFORMATION SCI & TECH
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