Secure and robust audio watermarking scheme based on discrete fractional transform

The traditional transform domain watermarking schemes are insecure for publicity characteristic of transform itself. Aimming at this, a secret discrete fractional sine transform (DFRST) domain audio watermarking scheme is proposed in this paper. The undeterminate angle of DFRST is utilized and the security of the proposed scheme is enhanced using chaotic sequences. Experimental results show the proposed secure scheme is imperceptible and robust against various signal processing attacks.