A Robust Watermarking Algorithm Based on Multi Resolution Decomposition of Audio Signal

A new audio watermarking algorithm based on wavelet domain transformation is being presented in this paper. The proposed algorithm follows embedding and extraction processes. In the embedding procedure, the audio signal is divided into non overlapping frames and then each frame is decomposed into 3-level wavelet transform using 4-coefficient daubechies wavelet (db4) filter. Then after using a quantization function, IDWT is applied to the modified wavelet coefficient to get the watermarked audio signal. The process of extraction followed is blind. Experimental results show that the proposed algorithm has good robustness even under general signal processing attacks.