A kind of ultra-long picture group code rate control method and device

Abstract

The invention discloses a code rate control method and device for a super-long picture group. First, according to the frame structure of the set super-long picture group and the current video image resolution, the super-long picture group is allocated according to the preset initial allocation principle. The bit rate of each frame; then obtain the exposure gain information and motion information corresponding to the video image and the video image, divide the video image in units of macroblocks of preset size, and count the motion information corresponding to each macroblock; according to the exposure gain information and According to the motion information corresponding to each macroblock, the code rate of each frame in the super-long picture group is adjusted; finally, the remaining code rate is calculated according to the code rate of each frame in the super-long picture group. The bit rate of each frame is dynamically adjusted. The method and device of the present invention can ensure that the total code rate of the GOP image group remains within a certain range, reduces the fluctuation of the code rate, and can ensure the picture quality of the video image.

Description

technical field [0001] The invention belongs to the technical field of video coding, and in particular relates to a method and a device for controlling the code rate of an ultra-long picture group. Background technique [0002] Video surveillance is an important part of the security system. Video surveillance is widely used in many occasions because of its intuitive, accurate, timely and rich information content. In recent years, with the rapid development of computer, network and image processing and transmission technology, the popularization trend of video surveillance has become more and more obvious. Video surveillance has undergone tremendous changes in recent years, digitization, high-definition, so that the clarity of the image has been comprehensively improved, which has higher requirements for network bandwidth, and now the mainstream 1080P has gradually been replaced by 5M, 8M and even 12M. The resolution is replaced, and the bandwidth problem follows. Under the ...

AI Technical Summary

Problems solved by technology

However, in the design of the technical solution, since the ROI is a rectangular area, it cannot be controlled too strongly, otherwise the area of ​​interest and other areas will have a serious sense of layering

[0004] In addition, simple ROI control cannot greatly reduce the bit rate while ensuring a high-quality overall effect. In particular, when there are many moving objects, it cannot reduce the bit rate well while ensuring quality.

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