A scalable condensed encoding method and device for surveillance video

Abstract

The invention relates to a scalable synopsis coding method for a monitor video. The method comprises following steps of analyzing a to-be-coded monitor video to acquire region information and mapping information of a movement object in each frame of the to-be-coded monitor video; determining coding priorities corresponding to different regions of each frame in the to-be-coded monitor video, making the region to be displayed in a video summary the region having a high coding priority, and making the region not to be displayed in the video summary the region having a low coding priority; performing basic layer coding on the region having the high priority of each frame, so as to acquire a basic layer code stream; performing enhancement layer coding on the region having the low priority of each frame according to a time domain scalable code of a region of interest (ROI), so as to acquire an enhancement layer code stream; and compounding the coded basic layer code stream and the enhancement layer code stream, so as to generate a scalable code stream to finish coding. According to the method, the monitor video can be coded flexibly and effectively, furthermore, the storage efficiency of an original monitor video and the video summary can be improved.

Description

technical field [0001] The present invention relates to the field of surveillance video encoding, in particular to a scalable and concentrated encoding method and device for surveillance video. Background technique [0002] With the development of science and technology, the application of surveillance video is becoming more and more common, and the related technologies of surveillance video are becoming more and more abundant, such as scalable and concentrated browsing technology, ROI (ROI, region of interest, region of interest) based time Domain scalable coding techniques, etc. [0003] In the field of scalable coding of surveillance video, traditional scalable coding techniques include time domain scalable coding technology, space domain scalable coding technology and quality scalable coding technology. Specifically, with time-domain scalable coding technology, users can obtain video streams with different frame rates according to the size of the network bandwidth, the ...

AI Technical Summary

Problems solved by technology

Although this method satisfies the need for quick browsing of surveillance video to a certain extent, the storage efficiency of this method of storing the original surveillance video and the condensed video separately is low, which will increase the storage burden and increase the operating cost of the surveillance system. Users can only browse condensed videos with fixed needs

[0007] According to the analysis of the existing surveillance video scalable coding and fast browsing method, it has the following disadvantages: on the one hand, because there is no flexible and effective surveillance video storage and browsing method to support, the user based on the original condensed video browsing scheme , only a few condensed videos with fixed content can be browsed at a time; on the other hand, the existing scalable coding method is not directly compatible with the video condensing method, so that the original surveillance video and the condensed video can only be stored in an independent way, However, the storage efficiency of storing the original surveillance video and the condensed video at the same time is low

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