Audio digital watermarking based on trap strategy

Digital watermarking techniques have been proposed as a solution to the problem of copyright protection of multimedia. A new scheme for robust, high-quality embedded audio watermarking is presented, in which we took the effect of different attacks into account and designed the trap. strategy. Trap strategy can assure that if the strong attack can removes the watermark embedded in audio, it destroys the watermarked audio as well, or else the watermark can be detected with very high response. Watermarks are embedded by quantizing audio's DCT coefficients using the trap strategy and extracted by different ways due to different attacks. Because of the binary image we used as watermark, the extracted watermark can be identified directly. Comparing to former algorithm (cocktail watermarking), in our method, watermark is blind detected with a very high detector response, the proposed algorithm performance is largely improved. Experimental results demonstrate this scheme is remarkably effective, and high robust against some attacks, including MP3 compression, low-pass filtering and resampling and so on.