Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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: 2015-06-24
HEFEI UNIV OF TECH
View PDF5 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • H.264 video integrality authentication method
  • H.264 video integrality authentication method
  • H.264 video integrality authentication method

Examples

Experimental program
Comparison scheme
Effect test

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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/8358H04N19/122H04N19/625
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com