Blind audio watermark implementing method based on logarithmic quantization index modulation

A technology of index modulation and implementation method, which is applied in speech analysis, instrumentation, etc., and can solve problems such as small embedding amount, multi-spectrum, and occupancy
CN102664014AInactive Publication Date: 2012-09-12TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2012-09-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a blind audio watermark implementing method based on logarithmic quantization index modulation, and belongs to the technical field of audio watermarks. The blind audio watermark implementing method is characterized by including sufficiently utilizing robustness of vector norms and imperceptibility of the logarithmic quantization index modulation based on mu-law companding; improving safety and robustness of a watermark by the aid of a chaos sequence encryption watermark image; converting the sectioned vector norms of wavelet approximate components into a transform domain via the mu-law companding; then embedding an encryption binary watermark image; and extracting the binary watermark image after the watermark is attacked. The audio watermark algorithm has the advantages of high volume, fine tone, imperceptibility and robustness and low complexity, the watermark still can be correctly extracted by the aid of the method under various watermark attack conditions, and accordingly amplitude attack can be effectively resisted by the method.
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Description

technical field

[0001] The invention relates to a blind audio watermark implementation method based on logarithmic index modulation. The method not only has the characteristics of high capacity and good sound quality, but also has the advantages of good imperceptibility, good robustness and low complexity. In the case of various watermark attacks, the method can still be used to extract the watermark correctly, and this method can effectively resist the amplitude attack. Background technique

[0002] Digital watermarking (Digital Watermarking) is to use the redundancy of human perception system (such as visual or auditory system) to embed some identification information in images, audio and other carriers, but it does not affect the use value of the original carrier.

[0003] According to different watermarking carriers, watermarking technology can be divided into several categories such as video watermarking, image watermarking, and audio watermarking. At present, video an...

Claims

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