Configuration method of layered B forecasting structure with high compression performance
A technology with structural configuration and high compression, applied in the field of video coding, it can solve the problems of large amount of information, high storage capacity and transmission network bandwidth requirements, and achieve the effect of good average coding rate distortion performance.
Active Publication Date: 2011-06-15
万维显示科技(深圳)有限公司
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[0003] However, the amount of information contained in digital video is very large, which requires high storage capacity and transmission network bandwidth.
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[0021] High compression performance hierarchical B prediction structure configuration method is:
[0022] A recursive dichotomy is used to configure the hierarchical B prediction structure, that is, a B picture is first used to divide the image group into two sub-image groups. Divide a B picture into two smaller sub-image groups, respectively use the images at the beginning and end of each part as reference, and proceed until there is no division;
[0023] If the length of the image group or sub-image group is L, and L>1, then the image group or sub-image group is divided into two smaller sub-image groups, and the distance between the picture B of the image group or sub-image group is one of the first and last images The distance should be an integer power of 2 D 1 = 2 m , m is a positive integer and the value method is: let Represents rounding down, if L≥2 n ×3, then m=n+1, otherwise m=n, the distance between the picture B and the other image in the first and last imag...
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The invention discloses a configuration method of a layered B forecasting structure with high compression performance, which comprises the following steps: configuring the layered B forecasting structure by using the recursive dichotomy; dividing an image group into two sub-image groups by the image B of the first layer; and then, respectively dividing each sub-image group of which the length is greater than 1 into two smaller sub-image groups by the image B of the lower layer, and carrying out recursion until the whole dividing process is finished, wherein the image B for each dividing process is selected through a simple expression. The invention is suitable for any image group length, and the configuring difficulty and the dividing regularity of the configuration method of the invention are equivalent to that of of the traditional configuration method. However, the configuration method in the invention obtains an optimal forecasting structure through dynamic programming search on the basis of mathematical modeling on the compression performance of the layered B forecasting structure; and the experimental result indicates that under various image group lengths, the configurationmethod of the invention has better average coding rate distortion performance.
Description
technical field [0001] The invention relates to the field of video coding, in particular to a method for configuring a layered B prediction structure with high compression performance. Background technique [0002] Compared with analog video, digital video has many advantages such as high quality, easy processing, easy correction, large capacity, and many programs. With the continuous improvement of people's demand for video quality and benefiting from the advancement of technology, digital video has been more and more widely used today. [0003] However, the amount of information contained in digital video is very large, which requires high storage capacity and bandwidth of transmission network. In order to make digital video more effective, compression coding is the first problem to be solved. For this reason, academia and industry have carried out extensive and in-depth research in the field of video compression coding technology. At present, the main methods of video ...
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IPC IPC(8): H04N7/32H04N7/26H04N19/114H04N19/149H04N19/30H04N19/503H04N19/56H04N19/567
Inventor 朱政李东晓张明
Owner 万维显示科技(深圳)有限公司