Establishment of Display-Oriented Video Transcoding Rate Decision Model and Parameter Determination Method

A decision-making model and transcoding rate technology, which is applied to the establishment of video transcoding rate decision-making models and the field of parameter determination, can solve the problem of not considering the performance differences of video display terminals, redundant control strategies, and failure to fully achieve rate distortion. Optimization and other issues to achieve the effect of ensuring visual experience, reducing code rate, and reducing visual redundancy
CN108769736BActive Publication Date: 2019-09-17重庆瑞景信息科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
重庆瑞景信息科技有限公司
Publication Date
2019-09-17

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Abstract

The invention provides a display-oriented video transcoding bit rate decision model establishment method. The method comprises the following steps of S1, calculating spatial complexity of a video; S2,calculating time domain complexity of the video; S3, extracting a description feature of a display, thereby obtaining angular frequency of eyes in a height direction of the display, wherein the description feature comprises observation distance, display height and the pixel number of the display in the height direction; S4, evaluating the quality of images in a wavelet domain, thereby obtaining video degradation; and S5, taking the spatial complexity of the video, the temporal complexity of the video, the description feature of the display and the video degradation as input, taking a target bit rate or a quantization order as output, and carrying out training through utilization of a support vector machine, thereby obtaining a bit rate control decision model. According to the method, influences of display equipment performance difference on vision are taken into consideration, the video redundancy in video information after the transcoding is reduced as much as possible in a transcoding process, and the transcoding efficiency of a transcoder is improved.
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Description

technical field

[0001] The invention relates to a video transcoding method, in particular to a display-oriented video transcoding rate decision model establishment and parameter determination method. Background technique

[0002] In recent years, the rapid development of communication technology and multimedia technology has made multimedia applications on mobile devices more and more popular. Users have higher and higher requirements for image resolution, and the transmission of high-resolution video signals requires higher bandwidth. Although most of the current wireless communication has been converted from the original 2G network to the 4G network, compared with video transmission, 4G bandwidth is still insufficient when transmitting high-definition and ultra-high-definition video, so it is necessary to reduce the bit rate required for video transmission through transcoding . In the past 20 years, relevant researchers have conducted a lot of research on transcoding tec...

Claims

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