Digital Audio Watermarking Algorithm Based on Singular Value Decomposition in DCT Domain

As a main method for copyright protection,digital watermark techniques have been widely studied and applied.A new algorithm of digital audio watermarking based on DC components in DCT(Discrete Cosine Transform) domain is presented.According to the watermarking embedded principle that the place of large energy in DCT domain can hide more messages,combined with the characteristic of audio signal in DCT domain,the source audio signal is divided into segments,then the points that will embedded watermark signal on the segments' DCT domain are found.The algorithm realizes to hide a binary image in an audio signal.The analysis of watermark embed depth test and StirMark attacks are also presented.Studies have shown that the algorithm of digital audio watermarking has best result on robust and imperceptible,such as low pass filter,resample,MP3 compression and so on.