An optimization method for hevc rate control based on joint space-time domain information

A bit rate control and optimization method technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of low accuracy of bit allocation and degradation of subjective video quality, so as to improve accuracy and reduce fluctuations Effect

Active Publication Date: 2022-08-05
SICHUAN UNIV
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Problems solved by technology

However, HEVC uses MAD as a measure of coding unit complexity when performing bit allocation, and does not fully consider the characteristics of human vision, resulting in a series of problems such as low accuracy of bit allocation and degradation of subjective video quality.

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  • An optimization method for hevc rate control based on joint space-time domain information
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  • An optimization method for hevc rate control based on joint space-time domain information

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the examples. It is necessary to point out that the following examples are only used to further illustrate the present invention, and should not be construed as limiting the protection scope of the present invention. Those skilled in the art are based on the above invention. content, some non-essential improvements and adjustments are made to the present invention for specific implementation, which should still belong to the protection scope of the present invention.

[0042] (1) The method proposed in the present invention is developed on the HEVC standard test code HM16.0 platform. The configuration file selects encoder_lowdelay_P_main.cfg, the encoding structure is IPPP, the GOP size is set to 4, and the IntraPeriod is set to 4. In the rate control parameter configuration, RateControl is set to 1, indicating that the rate control is turned on;

[0043] (2) The test sequence to verify ...

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Abstract

The invention starts from the mismatch between the code rate control model in HEVC and the visual characteristics of human eyes, and discloses an HEVC code rate control optimization method based on joint information in the space-time domain. First, the Sobel operator is used to obtain the spatial and temporal information; after correcting the extreme coefficient values, the joint spatial-temporal information guides the frame-level target bit allocation; CTU-level bit allocation; finally, after a CTU or a frame is encoded, the BFGS algorithm is used to update the parameters. Compared with HEVC or VVC, the code rate control optimization method disclosed in the present invention is error , SSIM, time complexity and rate-distortion curves have been improved, and the per-frame bit allocation and PSNR fluctuations are smoother. The video sequence obtained based on the present invention more satisfies the needs of the human visual system, and can achieve great optimization in terms of subjective quality.

Description

technical field [0001] The present invention relates to the technical problem of code rate control optimization in the field of video coding, in particular to a high efficiency video coding standard (High Efficiency Video Coding, HEVC) code rate control optimization method based on joint spatial-temporal domain information. Background technique [0002] With the increasing progress of communication technology and the popularization of smart terminals, all kinds of videos have gradually entered people's daily life. etc.) has become the trend of multimedia technology development. What follows is the explosive growth of video data volume, and the current mainstream video coding standard H.264 / Advanced Video Coding (AVC) can hardly compress videos with large data volume efficiently. In April 2010, two international organizations, the video coding experts group (VCEG) and the moving picture experts group (MPEG), jointly established the JointCollaborative Team on Video Coding (JC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/146H04N19/184H04N19/70
CPCH04N19/146H04N19/70H04N19/184
Inventor 何小海赵则明熊淑华孙伟恒张斐然卿粼波滕奇志
Owner SICHUAN UNIV
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