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H.264 video integrality authentication method

An authentication method and integrity technology applied in the field of H.264 video integrity authentication

Inactive Publication Date: 2013-01-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary authentication methods cannot meet this requirement, because they only reflect the authenticity of the overall data

Method used

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  • H.264 video integrality authentication method
  • H.264 video integrality authentication method
  • H.264 video integrality authentication method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0149] A H.264 video integrity authentication method, comprising the following content:

[0150] (1) Authentication code generation

[0151](a) Smooth and fast hierarchical quantitative authentication code generation

[0152] Since the length of the authentication code cannot be too large, the dimensionality reduction of the original data is very necessary. For a given video frame F we first extract its luminance component F L As processing, we then downsample by computing the mean of the 4×4 sub-blocks.

[0153] Let us look at a numerical example, for a CIF image with a resolution of 352×288, F d The dimensions are 88×72, which is still too large for an authentication code. We further add F d It is divided into several sub-blocks for feature extraction. The sub-block size is again chosen to be 4×4, or even 8×8 if a smaller authentication code is required.

[0154] figure 1 Shown as a structure of blocks and sub-blocks. The characteristic value will be extracted from ...

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Abstract

The invention discloses an H.264 video integrality authentication method which comprises processes of extracting authentication codes, embedding identification information and tamper detecting and positioning. A video sequence is more complex than image information, so that video identification codes can not be extracted simply with the method of image hash value extracting. The invention provides a space energy fluctuation analysis method, according to video frames having different characteristics, an improved hierarchical quantization and vector quantization method is targetedly utilized, and video identification codes can be effectively extracted. In combination with improved H.264 robust watermarking algorithm and H.264 high-capacity information hiding algorithm, an H.264 video integrality authentication system is formed, and researches on tamper detecting and positioning can be conducted.

Description

technical field [0001] The invention relates to the field of video authentication, in particular to an H.264 video integrity authentication method. Background technique [0002] The rapid development of digital signal processing technology and broadband network facilities makes the production and distribution of digital content more and more convenient. Digital image / video editing work that was once done only by professional standards can now be done easily with the help of a lot of cheap or even free software and hardware. [0003] This convenience undoubtedly brings convenience and benefits to most users, but it also creates certain doubts. First of all, under the premise of not affecting the enjoyment of digital multimedia by legitimate users, copyright protection of media content such as digital music, movies and books has become a new subject that needs to be studied urgently. The second is content authentication. Due to the easily editable nature of digital data, peo...

Claims

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Application Information

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IPC IPC(8): H04N21/8358H04N7/26H04N19/122H04N19/625
Inventor 蒋建国齐美彬洪日昌张国富汪萌宣曼尤小泉夏娜苏兆品詹曙吴从中李小红
Owner HEFEI UNIV OF TECH
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