Audio watermarking for copyright protection based on psychoacoustic model and adaptive wavelet packet decomposition

A novel audio watermarking scheme for copyright protection is proposed in this paper. By modifying the, watermark relationship between adjacent coefficients, message is embedded in the wavelet packet domain. The embedding procedure is controlled by Psychoacoustic Model to guarantee inaudibility. The new method combines the psychoacoustic model with wavelet packets to choose the best basis of wavelet packet decomposition such that the decomposed subbands are closer to Critical Bands. Therefore the masking thresholds in the new approach are larger than the previous proposed ones. In this way, the proposed scheme enlarges the range for the watermark to resist attacks and become more robust Experimental results show that the proposed scheme can effectively resist a variety of signal manipulations and attacks, including MPEG compression, low-pass filtering, resampling, white/random noise adding, etc.