Research for Synchronic Audio Information Hiding Approach Based On DWT Domain

Based on the method of information hiding, a novel algorithm for security speech communication is designed in this paper,and the synchronization code can be used to search the embedded location. Firstly, the DWT is performed on each segment of the original carrier audio; Secondly, the embedding bits are constructed by the synchronization code and secret audio,and the secret bits are formed by chaotic encrypting; Thirdly, the secret bits are embedded into the low frequency point of Discrete Wavelet Transform (DWT) by quantization;Lastly,the IDWT are performed on each segment and the setgo audio are constructed. The original carrier audio is not required in the secret audio recovery. Experimental results show that the stego audio has transparent feature, and the quality of the recovered audio is satisfying. The algorithm is strongly robust to many attacks, such as resampling, cropping and so on..