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Robust digital audio watermark embedding and detection method based on polar harmonic transform

A technology of digital audio and watermark embedding, used in speech analysis, instruments, etc.

Inactive Publication Date: 2016-06-01
LIAONING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most existing audio watermarking algorithms can only resist conventional signal processing, but cannot effectively resist desynchronization attacks.

Method used

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  • Robust digital audio watermark embedding and detection method based on polar harmonic transform
  • Robust digital audio watermark embedding and detection method based on polar harmonic transform
  • Robust digital audio watermark embedding and detection method based on polar harmonic transform

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Experimental program
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Embodiment Construction

[0049] A robust digital audio watermark embedding method based on extreme harmonic transformation, which is characterized in that it is carried out according to the following steps:

[0050] Step 11: Watermark preprocessing: convert binary watermark image Scrambling encryption as a secure watermark matrix ,among them

[0051]

[0052] In order to facilitate the embedding of a two-dimensional watermark image into a one-dimensional audio signal, the dimensionality reduction process is performed on it, that is, the two-dimensional watermark image is converted into a one-dimensional binary watermark sequence:

[0053] ;

[0054] Step 12: Segment the original audio carrier according to the size of the digital watermark and synchronization code, and then embed the synchronization code using the statistical characteristics of the time domain audio samples, as follows:

[0055] Step 121: Put According to the length of the synchronization code Divided into Paragraphs, each paragraph conta...

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Abstract

The invention discloses a robust digital audio watermark embedding and detection method based on polar harmonic transform. Advantages of great frequency domain localization features, multi-scale, redundancy and translation invariance, the features of non-stationary of greatly describing signals and maintaining the shape of the signals and the same length of audio frequency of each sub-band after decomposition with that of the original audio frequency of nonsubsampled wavelet transform are utilized; then great numerical stability of polar harmonic transform is also utilized, and watermarks are embedded in stable torque values to resist the normal signal attack; and then the synchronization code technology is combined. The experimental results indicate that normal signal processing can be resisted and the desynchronization attack can also be effectively resisted so that the method has great imperceptibility and robustness. Besides, the method also has advantages of being simple in design and easy to realize.

Description

Technical field [0001] The invention belongs to the technical field of digital audio watermarking, in particular to a robust digital audio watermark embedding and detection method based on extremely harmonic transformation that can resist conventional signal processing and effectively resist desynchronization attacks. Background technique [0002] Digital Watermarking is a new technology that can protect copyright and the source and integrity of authentication in an open network environment. Audio watermarking technology is to hide a mark (watermark) with a specific meaning in a digital audio product using the method of data embedding, to prove the creator’s ownership of his work, and as a basis for identification and prosecution of illegal infringement, and at the same time pass The detection and analysis of watermarks ensure the integrity and reliability of digital information, thus becoming an effective means of intellectual property protection and digital multimedia anti-coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/018
CPCG10L19/018
Inventor 杨红颖王思淼王向阳牛盼盼
Owner LIAONING NORMAL UNIVERSITY
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