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MP4 file encapsulation format-based video authentication watermark embedding and extraction method

A watermark extraction and watermark embedding technology, applied in the field of information security, can solve the problems of lack of implementation efficiency and computational complexity, and achieve the effects of real-time operation, relevance, and high flexibility

Inactive Publication Date: 2012-09-19
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above existing technologies can realize watermark embedding and extraction to a certain extent, but they are lacking in implementation efficiency and computational complexity

Method used

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  • MP4 file encapsulation format-based video authentication watermark embedding and extraction method
  • MP4 file encapsulation format-based video authentication watermark embedding and extraction method
  • MP4 file encapsulation format-based video authentication watermark embedding and extraction method

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Embodiment Construction

[0028] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0029] Such as figure 1 As shown, the specific steps are:

[0030] The first step is to read the sample data to be embedded in the MP4 video file, use the HMAC digital signature algorithm, the user enters the password as the key, and calculate the digital signature S of the sample data contained in each block in units of blocks i , get the watermark sequence {S 1 , S 2 ,...,S n}, where n is the total number of blocks in the video;

[0031]Described MP4 video file refers to: conform to the video file of ISO / IEC 14496-14 standard, be made up of several containers that encapsulate data, specifically by: have and ...

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Abstract

The invention discloses an MP4 file encapsulation format-based video authentication watermark embedding and extraction method in the technical field of information security. The method comprises the following steps of: reading sample data to be embedded into an MP4 video file, and calculating the digital signature Si of the sample data in each block by taking the block as a unit to obtain a watermark sequence {S1, S2, ..., and Sn}; constructing a user data sub-box by utilizing the watermark sequence {S1, S2, ..., and Sn}, and filling the user data sub-box into a user data box of each track inthe MP4 file; adding identifiers to track header boxes embedded into the watermark tracks to indicate that the tracks have watermarks; and correspondingly modifying box size identification data in the user data box, and MP4 file size identification data in the track boxes and image boxes. By the method, the real-time operation of hiding video information is realized; and embedding positions are the user data boxes, and information capacity can be determined according to video sizes, so high flexibility and extensibility are ensured.

Description

technical field [0001] The invention relates to a method in the technical field of information security, in particular to a video authentication watermark embedding and extraction method based on MP4 file encapsulation format. Background technique [0002] With the rapid development of information technology and computer networks, people can obtain multimedia information conveniently and quickly through the Internet. Due to the easy-to-copy characteristics of multimedia information, piracy and copyright disputes have become increasingly serious social problems. In order to realize the copyright protection of the video, some people propose to complete it through encryption, and publish the video file on the network after encrypting it. Although this makes illegal attackers unable to obtain confidential information from the ciphertext, it has considerable limitations and seriously damages the sharing of information. Therefore, the concept of information hiding has emerged, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/8358G06T1/00
Inventor 孙锬锋蒋兴浩程东阳王琬徐澜李良祯
Owner SHANGHAI JIAO TONG UNIV
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