Encoding method and decoding method for static background video

A technology of static background and coding method, which is applied in the field of coding and decoding of static background video, can solve the problems of wasting coded streams, etc., and achieve the effects of low storage occupation, small coding complexity, and good expansion performance

Active Publication Date: 2020-11-06
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

[0005] The present invention provides a coding method and a decoding method for static background video, which solves the problem that the existing ROI coding method still needs to perform code rate allocation and coding on non-interest regions and images without objects of interest, which wastes A large number of code streams and other issues

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  • Encoding method and decoding method for static background video

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Embodiment Construction

[0025] As we all know, I frame is I frame, also known as intra picture, and I frame is usually the first frame of each GOP (Group of Pictures, so-called GOP, which means group of pictures, and a GOP is a group of continuous pictures). , it does not refer to other images for independent encoding, so the data volume of the coded stream after I-frame encoding is particularly large, but it can be used as a reference image for random access. In a static background video, no matter whether the image in the video contains the object of interest or not, and whether the background image changes, existing coding methods need to encode the image with I frames periodically, so that the unchanging background that does not contain the object of interest Using I-frame encoding for images will waste a lot of code stream. Therefore, the present invention provides a coding method and a decoding method for static background video, which only encodes the target area of ​​interest, and other areas...

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Abstract

The invention belongs to the technical field of encoding and decoding, and discloses an encoding method for a static background video. All frames of images of a static background video are classifiedbased on whether or not the images contain an object of interest, the object of interest in the images including the object of interest is segmented out and the images including the object of interestare encoded separately, and frame skip encoding is adopted for the images not including the object of interest. The invention further discloses a decoding method for a static background video. According to the method, a static background video can be coded, the compression ratio of the static background video is greatly improved, meanwhile, the definition of the image of a region of interest is greatly improved, and therefore the requirements for storage and later analysis of the static background video are better met.

Description

technical field [0001] The invention belongs to the technical field of video coding and decoding, and in particular relates to a coding method and a decoding method for static background video. Background technique [0002] Static background video refers to a video with a fixed background and few moving objects, such as various surveillance scene videos, industrial production and inspection videos, and other applications. In static background video, region of interest (ROI, region of interest) coding is a key technology for static background video applications. [0003] The existing video monitoring ROI encoding method is as follows: first select the foreground area and the background area in the image area, and the image quality level of the foreground area selected by the user; According to the code rate allocation ratio, the code rate of the foreground area and the background area is allocated according to the code rate allocation ratio; the video surveillance codec syst...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/157H04N19/167H04N19/17
CPCH04N19/157H04N19/167H04N19/17
Inventor 李国平王国中范涛侯世维商习武赵晓丽沈怡君
Owner SHANGHAI UNIV OF ENG SCI
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