Dual encryption based discrete wavelet transform-discrete cosine transform (DWT-DCT) domain audio public watermarking algorithm

Abstract

The invention discloses a dual encryption based DWT-DCT domain audio public watermarking algorithm. The algorithm comprises a watermark embedding process and a watermark detection process. The watermark embedding process sequentially comprises dual encryption of a binary watermark image, segment treatment on an original voice frequency, DWT and DCT of each segment coefficient, quantization embedding, inversed discrete cosine transform (IDCT) and inversed discrete wavelet transform (IDWT) of a quantization coefficient, reorganization and obtaining of a voice frequency containing watermark information. The watermark detection process sequentially comprises segment treatment on an audio signal to be tested, DWT and DCT of each segment coefficient, summing of watermark reference values at corresponding positions of n watermark coefficient series, reconfiguration of a two-dimensional image, inverted scrambling treatment and obtaining of a restored watermark image. By the aid of the algorithm, the transparency of watermarks is effectively guaranteed, the miss ratio of watermarks is greatly reduced, and the robustness and the accuracy of the watermark detection are improved.

Description

technical field

[0001] The invention relates to the technical field of image information security, in particular to a DWT-DCT domain audio public watermark algorithm based on double encryption. Background technique

[0002] In recent years, the discourses about authentication watermarking at home and abroad are increasing day by day. Watermark preprocessing is a relatively common method to ensure the security of watermarks. Usually, the image scrambling method is used to make the image chaotic and play an encryption role. However, the image scrambling method is periodic, and if it continues to change according to the original method, it will The original watermark information is restored, so the security of this encrypted watermark is relative and has certain defects.

[0003] Chaos phenomenon is a similar stochastic and deterministic process that occurs in nonlinear dynamical systems. The main features of chaotic sequence: (1) The form is simple. Only the parameters of t...

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