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A shot segmentation method based on x264 compressed video

A lens segmentation, X264 technology, applied in the direction of digital video signal modification, electrical components, image communication, etc., can solve the problem that the compressed domain lens segmentation method is not applicable, the GOP has no length and structure, etc., and achieves good recall rate and accuracy. efficiency, and the effect of reducing the amount of computation

Inactive Publication Date: 2018-06-12
COMMUNICATION UNIVERSITY OF CHINA
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AI Technical Summary

Problems solved by technology

[0015] The GOP of X264 compressed video has no fixed length and structure, and the traditional compression domain shot segmentation method is not applicable

Method used

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  • A shot segmentation method based on x264 compressed video
  • A shot segmentation method based on x264 compressed video
  • A shot segmentation method based on x264 compressed video

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the present invention, but not to limit the scope of the present invention.

[0040] A shot segmentation method based on X264 compressed video, which detects the sudden transition and gradual transition of the shot in the video. The detection of the sudden change shot is divided into two aspects: the detection of the sudden change occurring in the I frame and the detection of the sudden change occurring in the P frame. If the mutation occurs in the I frame, according to the GOP division process of X264, it is detected by comparing the length of the GOP; if the mutation occurs in the P frame, it is necessary to check whether the intra-frame prediction macroblock ratio P_intra of the P frame exceeds the threshold of the shot mutation. For the detection of the g...

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Abstract

The invention relates to a shot segmentation method based on X264 compressed video. The method includes: taking the image group GOP of the X264 compressed video as a unit and decoding frame by frame to extract the frame number, frame type and intra-frame prediction macroblock ratio; performing lens detection on the I frame in the GOP to be measured, and judging according to the length of the GOP to be measured Whether a shot mutation occurs in the current I frame; taking the intra-frame predicted macroblock ratios of all P frames in the GOP to be tested as sample data, judging whether shot segmentation is needed according to the fluctuation degree of the sample data; performing shot segmentation based on the predicted macroblock ratios. The invention can perform shot segmentation on the compressed video whose GOP length and structure are not fixed. When the shot segmentation occurs in an I frame, the prior art generally utilizes the change of the predicted macroblock ratio in adjacent frames of the I frame for detection, which requires the video to have a fixed GOP length and structure. However, the present invention can realize the lens transition detection of the I frame only by using the parameters of the I frame itself.

Description

technical field [0001] The invention belongs to the field of video shot segmentation, and in particular relates to a shot segmentation method based on X264 compressed video. Background technique [0002] With the development of multimedia and Internet technology, on the one hand, people can conveniently enjoy various services such as video on demand and online viewing without leaving home, and the requirements for video services are getting higher and higher. On the other hand, the media industry has brought people information and entertainment for a long time, and the massive storage has also made the importance of media asset management increasingly prominent. Shot segmentation technology is of great significance to the solution of the above two problems. First of all, shot segmentation technology is the first step and one of the most important steps based on video content retrieval, and its accuracy will directly affect the effect of subsequent processing. Secondly, in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/142H04N19/177
Inventor 姜秀华张文宇
Owner COMMUNICATION UNIVERSITY OF CHINA
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