A Robust Audio Information Hiding Algorithm Base on DCT and DWT

First the entire host audio is decomposed by wavelet to several frequency bands, then Select an frequency band which is insensitivity to the human ear hearing and its corresponding wavelet coefficients to hide information. Those coefficients are separated to some segments, and at the same time convert those segments to DCT domain. The watermark can be embedded to the DCT direct current coefficients. Experimental results show that the watermarked audio has good imperceptibility. By contrast with other algorithms in DCT domain, this algorithm has better robust performance, which is robust against different kinds of attacks, such as noise, low-pass filtering, resampling, echo, Mp3 compression.The robustness and the imperceptibility about watermarked audio reach a good balance.