Research for adaptive audio information hiding approach based on DWT

With the development of the computer network and the message expansion over the Internet, information security is becoming increasingly important. The technology of embedding audio watermark into an audio signal was researched in the DWT domain and an algorithm of additive audio watermarking based on SNR adaptive to determine a scaling parameter is proposed in this paper. The intensity of embed watermark based on the human audio system is maximum as much as possible and a balance is made between robustness and imperceptible. The watermarking signal can be extracted by blind detection in the receiving end. The experimental results demonstrate that the algorithm is robust to many operations to digital audio signal, such as re-sampling, low pass filtering and noise disturbing.