Digital audio watermarking usually embeds watermark into the host audio signals in an inaudible way, which relies on the inaudibility of the human auditory system. In general, an audio watermarking scheme adopts one of the following schemes. First one is quantization based watermarking, which quantizes the sample values to make valid sample values and invalid ones. Second one is the spread-spectrum method based on the similarity between watermarked audio and pseudo-random sequence. Third one is the two-set method based on differences between two or more sets, which includes the patchwork...