Digital audio watermarking algorithm based on linear predictive coding in wavelet domain

A digital audio watermarking algorithm based on discrete wavelet transform is presented. A visually significant binary image via some pre-processing and SS modulating is embedded in audio low-middle frequency coefficients in wavelet domain. A scheme of watermark detection is presented by using linear predictive coding, and it does not use the original signal during extracting watermark. The BER is improved 10%-15% in this algorithm compared with the algorithm in Wang R.D. and Chai P.Q. (2003). Experimental results show that the watermark is imperceptible and the algorithm is robust to many attacks, such as low pass filtering, resampling, MP3 compression and so on.