Device and method for detecting video coding format of video and audio media files

A media file and video encoding technology, applied in digital video signal modification, TV, electrical components, etc., can solve broadcast accidents, video server decoding failure, and cannot meet the high security and high reliability requirements of video and audio media files and other issues to achieve the effect of avoiding broadcast accidents and ensuring safe broadcasting

Active Publication Date: 2012-12-19
CHINA CENTRAL TELEVISION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the encapsulation format and video encoding method of the file are not in compliance with the standard, it will also cause the video server to fail to decode, resulting in broadcast accidents
Technical review only for video and audio technical parameters can no longer meet the needs of broadcast business development for high security and high reliability of video and audio media files

Method used

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  • Device and method for detecting video coding format of video and audio media files
  • Device and method for detecting video coding format of video and audio media files

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment is a video and audio media file video coding format detection device, such as figure 1 shown. This embodiment includes: a detection task acquisition unit, the detection task acquisition unit is connected to the file opening unit, the file opening unit is connected to the video and audio basic parameter detection unit and the information output unit, and the video and audio basic parameter detection The unit is connected with the Mpeg-2 basic stream detection unit and the information output unit, and the Mpeg-2 basic stream detection unit is connected with the information output unit, and the sequence head detection and image group are connected successively in the described Mpeg-2 basic stream detection unit Layer detection, image layer detection, slice layer detection, macro block layer detection five modules.

[0017] This embodiment is part of a technical review system. The technical review system not only reviews the encoding format of the video an...

Embodiment 2

[0028] This embodiment is a video and audio media file video encoding format detection method using the device described in Embodiment 1. The flow chart is as follows figure 2 shown. The steps of the method described in this embodiment are as follows:

[0029] The step of obtaining the detection task: the detection task acquisition unit is used to obtain task information in the database, and the detection task information includes the file name and storage path of the video and audio media files to be detected.

[0030] The step of video and audio media file decoding: for the described file opening unit to open the video and audio media file to be detected specified in the detection task information, to open the video and audio media file to be detected to determine whether the video encoding format is the Mpeg-2 format, If the medium to be detected fails to open or the video encoding format is not Mpeg-2 format, then enter the "step of detecting information output", if the ...

Embodiment 3

[0042] This embodiment is an improvement of the second embodiment, and is a refinement of the "steps of Mpeg-2 basic stream detection" of the second embodiment. The sub-steps of detecting each item in the "steps of Mpeg-2 basic stream detection" described in this embodiment include:

[0043] Sequence header detection, including: whether the horizontal size and vertical size of the video image meet the standard, whether the type and level meet the standard, whether the color format, and low delay meet the standard.

[0044] Group-of-picture layer detection, including: whether the time code conforms to the standard, and user data cannot contain strings with 23 or more consecutive zero bits.

[0045] Image layer detection, image layer detection for each image, including the last displayed image in the image group must be an I frame or P frame, an image sequence should contain at least one I frame or P frame, the corresponding MPEG-2 video sequence must be encoded as "111".

[0...

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Abstract

The invention relates to a device and a method for detecting a video coding format of video and audio media files. The device comprises a detecting task acquisition unit connected with a file opening unit, the file opening unit is connected with a video and audio basic parameter detecting unit and an information output unit, the video and audio basic parameter detecting unit is connected with an Mpeg-2 (moving picture experts group-2) basic flow detecting unit and the information output unit, and the Mpeg-2 basic flow detecting unit is connected with the information output unit. By the method and the device, the video and audio media files to be detected can be subjected to grammar or semantic layering detection defined in each layered structure of Mpeg-2 video streaming, and detection is sequentially performed from a top layer, a sequence header, a picture group layer, a picture layer, a Slice layer and a macro block layer; and the execution state and the execution progress of coding format compliance detection can be visually obtained, and error level and output error information are displayed after the coding format compliance detection is completed. Besides, broadcasting accidents due to the fact that the video and audio media files cannot be decoded by a video server can be avoided, and safety of broadcasting is guaranteed.

Description

technical field [0001] The invention relates to a video and audio media file video encoding format detection device and method, which is a computer network transmission device and method, and a detection device and method for video and audio media files transmitted in the network. Background technique [0002] As the production and broadcasting system gradually tends to be fully documented, more and more radio and television obtain compressed video and audio media files from digital media or data links. After the video and audio data is compressed into a file, it is impossible to intuitively know which file encapsulation format and video encoding format are used, and whether the encoding format meets the requirements of relevant specifications. Therefore, the technical review of video and audio media files should be divided into three levels, namely, file packaging format compliance, video encoding format compliance, and compressed video and audio technical parameters. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/64H04N19/89
Inventor 丁文华姚威宋宜纯宋蔚商同禇震宇张浩王蓉姜明李扬
Owner CHINA CENTRAL TELEVISION
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