Shear wave domain audio watermark embedding and detecting method based on robust QR decomposition

A technology of QR decomposition and audio watermarking, applied in image watermarking, image data processing, instruments, etc.

Inactive Publication Date: 2016-05-25
LIAONING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most existing audio watermarking algorithms can only resist conventional signal processing, but cannot effectively resist desynchronization attacks.

Method used

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  • Shear wave domain audio watermark embedding and detecting method based on robust QR decomposition
  • Shear wave domain audio watermark embedding and detecting method based on robust QR decomposition
  • Shear wave domain audio watermark embedding and detecting method based on robust QR decomposition

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Embodiment Construction

[0056] A shear wave domain audio watermark embedding method based on robust QR decomposition, characterized in that it proceeds in accordance with the following steps:

[0057] Step 11: Watermark encoding: Binary watermark image Scramble encryption into a secure watermark matrix ,in

[0058]

[0059] In order to facilitate the embedding of the two-dimensional watermark image into the one-dimensional audio signal, and then perform dimension reduction processing on it, that is, convert the two-dimensional watermark image into a one-dimensional binary watermark sequence:

[0060]

[0061] Finally, according to the following formula, the Perform BPSK modulation mapping to get a one-dimensional {-1,1} anti-phase sequence :

[0062] ;

[0063] Step 12: Segment the original audio carrier according to the size of the digital watermark and the synchronization code, and then use the time-domain audio sample statistics to embed the synchronization code, as follows:

[0...

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Abstract

The present invention discloses a shear wave domain audio watermark embedding and detecting method based on robust QR decomposition. By using the good frequency domain localization features of non-downsampling shear wave transform, multi-directional property, translation invariance and near optimal sparse representation ability, each subband audio and an original audio have the same length after decomposition, added with the good numerical stability of QR decomposition, an R matrix obtained by decomposition is an upper triangle stable matrix, a watermark is embedded into the upper triangle of the R matrix, and then the synchronous code technology is combined. A test result shows that: according to the method, conventional signal processing can be resisted and a desynchronization attack can be effectively resisted, and the method has good imperceptibility and robustness. In addition, the method has the advantages of simple design and easy implementation.

Description

technical field [0001] The invention belongs to the technical field of digital audio watermarking, in particular to a shear wave domain audio watermark embedding and detection method based on robust QR decomposition, which can resist conventional signal processing and effectively resist desynchronization attacks. Background technique [0002] Digital watermarking (Digital Watermarking) is a new technology that can protect copyright and authenticate the source and integrity in an open network environment. Audio watermarking technology is to hide a mark (watermark) with a specific meaning in a digital audio product by means of data embedding to prove the creator's ownership of his work and serve as a basis for identification and prosecution of illegal infringement. The detection and analysis of the watermark ensures the integrity and reliability of digital information, thus becoming an effective means of intellectual property protection and digital multimedia anti-counterfeiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/005G06T2201/0052G06T2201/0065
Inventor 王向阳石齐良牛盼盼
Owner LIAONING NORMAL UNIVERSITY
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