An audio content protection based on Integer transform

This paper proposes an algorithm to embed watermark based on chaotic sequences in the integer MDCT domain. The watermark has dual security feature, so it is difficult to extract the watermark signal without a private key. Experimental results show that by using chaotical sequences to hide the watermark, the watermark is both robust and secure. The proposed scheme is inaudible and robust against common signal processing attacks. Above all, it can retain the good property after various attacks which demonstrate that it is possible to protect the content of the audio signal.