Audio Watermarking with Error-Correcting Code

A non-blind two-channel time-frequency digital bits audio watermarking scheme with error-correcting code is described in this paper. The proposed method operates by encoding the watermark bits with cyclic code before embedding them into the audio signal. Time-frequency compression-expansion technique is used to embed the watermark bits. The coefficients to be deleted or added for the time-frequency compression-expansion technique are determined using psychoacoustic model. Both channels of the stereo audio signal are used for watermark embedding. This combination of cyclic-code and two-channel approach using the robust time-frequency technique of coding watermark bits has resulted in perfect recovery of watermark under attacks.