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Research on audio signal of embedding watermarking based on spread spectrum sequences

LIU Xue-mei,SU Guang-chuan(College of Information Science and Technology,Beijing Institute of Technology,Beijing 100081,P.R.China)  
A watermarking algorithm for digital audio based on spread spectrum is proposed.Using random sequence,the watermarking can be expanded.Through the transform of wavelet,watermarking can be embedded in the second layer of wavelet coefficients.Because of using the relation among the coefficients of wavelet when it is embedded,the watermarking signal can be extracted by blind detection at the receiving end.Experimental results show that the degradation caused by this algorithm is very slight,and the watermarking scheme is robust to various audio processing and malicious attacks.
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