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Method for adding DRM information to AVI file

A file adding and file technology, applied in information storage, recording information storage, electrical components, etc., can solve the problems of destroying the AVI file format, unable to play the file normally, not considering the damage of the AVI file, etc., to achieve the effect of ensuring integrity

Pending Publication Date: 2008-06-25
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] AVI (Audio Video Interleave, Audio Video Interleave) is a common file format. In order to protect the content of the AVI file, DRM information must be added to the AVI file. The traditional method of adding DRM information is to follow the DRM format for the entire file. Encapsulate, but this will destroy the original file format of AVI, so you have to modify the player, otherwise the file cannot be played normally
At the same time, the traditional method does not take into account that the AVI file may be damaged, and the added DRM information may be tampered with, so that the integrity of the content cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] First introduce the structure of the AVI file. AVI belongs to RIFF (Resource Interchange File Format: Resource InterchangeFile Format). AVI file consists of three parts: file header, data block and index block. The file header includes the general information of the file, defines the data format, the compression algorithm used and other parameters; the data block contains the actual data stream, that is, image and sound sequence data; the index block includes a list of data blocks and their positions in the file to provide Random access to data within the file.

[0017] The AVI file uses the four-character code FOURCC (Four-Character Code: Four-Character Code) to represent the data type. The file structure of the AVI file is shown in the table below:

[0018] R

I

F

F

File size

file type

The actual data

[0019] It consists of 4 parts: the four-character code 'RIFF', the file size part, the file type part, and the actua...

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PUM

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Abstract

The invention relates to a digital rights management (DRM) technique. The invention solves the technical problem that a DRM information addition method which can not damage an original structure of an AVI file is provided. The technical proposal adopted by the invention comprises the steps that: a. a trash block, a digital part of which is the DRM information, is added into the AVI file; b. the length information of the AVI file is modified; c. the signature data is added to the whole AVI file. The invention has the beneficial effects that the structure of the AVI file can not be damaged and a player can play the file normally; at the same time, the file can be signed, thereby ensuring the integrality of the file content and the DRM information.

Description

technical field [0001] The present invention relates to digital rights management (DRM) technology. Background technique [0002] With the rapid development of computer networks, especially broadband networks and wireless networks, more and more movies are released and circulated on the Internet. The normal way to obtain media files is to download after obtaining corresponding authorization, but the appearance of more and more unauthorized media files will greatly damage the interests of copyright owners. These files are very easy to disseminate and distribute, and have the same quality as genuine copies. Based on this, copyright protection for digital information is becoming more and more important. Technologies for strengthening the copyright protection of digital audio and video program content, such as digital rights management technology, have emerged at the historic moment, through which the integrity of these contents can be guaranteed and they can be used for legal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/913G11B20/00G06F21/00G06F21/10
Inventor 陈焜刘贤洪
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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