Dual encryption based discrete wavelet transform-discrete cosine transform (DWT-DCT) domain audio public watermarking algorithm
A double encryption, domain audio technology, applied in the field of image information security, can solve the problem of not effectively resisting watermark shearing attacks
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[0086] In order to verify the effectiveness of the watermarking algorithm of the present invention, we conduct simulation experiments under the environment of MATLAB7. The original audio signal of the experiment selects a monophonic digital audio signal with a sampling frequency of 44.1KHZ, a resolution of 16 bits, and a length of 9.75 seconds. The binary image of 32×32 is used as the original watermark image; among them, the number of selected coefficient segments n is 5, DWT (discrete wavelet transform) uses Daubechie-4 as wavelet base, DWT series L is 2, Arnold scrambling times is 9, Logistic chaotic sequence λ is 2, X 0 is 0.6.
[0087] The simulation results are as follows:
[0088] 1. The watermark algorithm of the present invention improves the security of the watermark. Such as figure 2 The result shown is the combination of sampling and chaos modulation of the binary watermark image. Visually, no useful information can be seen, and the image information becomes ch...
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