Method for watermarking small wave threshold digital audio multiple mesh based on blind source separation

A technology for digital audio and blind source separation, applied in digital transmission systems, image data processing, image data processing, etc., can solve the problem of small robust watermark information, complex embedding and extraction methods, watermark security depends on watermark embedding and extraction method etc.

Inactive Publication Date: 2007-04-04
DALIAN UNIV OF TECH
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method of simultaneously embedding robust watermark and fragile watermark in the wavelet coefficient of audio signal by means of the theory of blind source separation, so as to solve the problems related to the embed...

Method used

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  • Method for watermarking small wave threshold digital audio multiple mesh based on blind source separation
  • Method for watermarking small wave threshold digital audio multiple mesh based on blind source separation
  • Method for watermarking small wave threshold digital audio multiple mesh based on blind source separation

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Embodiment 1

[0058] The original audio signal is selected as a speech signal, and two situations of adult males and young females are considered. When the original audio signal is a speech signal, the parameters in the experiment are selected as follows: a r11 =0.75, a r12 =0.25, a r21 =0.99, a r11 =0.01; a f11 =0.97, a f12 =0.03, a f21 =0.95, a f22 =0.05; K=2048, th1=0.6, th2=20. Each piece of test speech (that is, the original audio signal) is monophonic, with a sampling frequency of 8kHz, a resolution of 16 bits, and a length of 8.192s. The time-domain waveform of an adult male speech signal is shown in Figure 3(a). The audio signal after embedding robust watermark and fragile watermark is shown in Fig. 3(b). Comparing Figure 3(a) and Figure 3(b), it can be seen that there is no difference between the two; the listening test of more than 10 people also shows that the audio signal after embedding the two watermarks has no perceivable distortion.

[0059] A robust binary watermar...

Embodiment 2

[0062] The original audio signal is selected as a piece of music signal, and three situations of popular music, classical music and country music are considered. When the original audio signal is the above three music signals, the parameters in the experiment are selected as follows: a r11 = 0.90, a r12 = 0.10, ar21 =0.99, a r11 = 0.01; a f11 =0.97, a f12 =0.03, a f21 =0.95, a f22 =0.05; K=2048, th1=0.6, th2=15.

[0063] Experimental results show that for the above music signals, the algorithm proposed by the present invention can also achieve better results. Especially for resampling attacks, the robustness when the original audio signal is a music signal is far better than that of a speech signal.

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Abstract

The invention is concerned with compose method of robust watermark and fragile watermark in the multimedia information safety technology field, especially of the production of robust watermark and fragile watermark, inset, pick-up and juggle detecting method of watermark. Using the instantaneous mixing model of blind source separation, the robust watermark and fragile watermark with large mount of information inset into originality audio frequency signal in arbitrary sequence, and the accurate orientation of juggle reflects the wave of signal to originality audio frequency data. It opens multi-objective inset, pick-up and juggle detecting method of watermark, and the safety of watermark depends on the encryption key information. Input the robust watermark and fragile watermark to the audio frequency production at the same time to protect the copyright and local the juggle. Because the inset of robust watermark and fragile watermark is in arbitrary sequence without the restriction of inset order, without keeping secret and pick-up arithmetic, it reduces the difficulty of arithmetic.

Description

technical field [0001] The invention belongs to the technical field of multimedia information security, relates to a method for integrating a robust watermark and a fragile watermark, in particular to a method for generating a robust watermark and a fragile watermark, and embedding, extracting and tampering detection methods of the watermark. Background technique [0002] At present, most researches on digital audio watermarking focus on robust watermarking for copyright protection or fragile watermarking for content integrity authentication. However, in many application fields, it is necessary to realize the purpose of copyright protection and tampering location at the same time. Robust watermarking can protect the copyright of audio products; fragile watermarking can realize tampering and positioning of audio products. Integrating the two, on the basis of requiring a simple algorithm and not needing to consider the embedding order of robust watermarks and fragile watermar...

Claims

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Application Information

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IPC IPC(8): H04L9/00G06T1/00G06K9/00
Inventor 马晓红丁小燕梁忠杰殷福亮
Owner DALIAN UNIV OF TECH
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