Robust and transparent audio watermarking based on improved spread spectrum and psychoacoustic masking

In this paper, the improved spread spectrum (ISS) modulation is modified and extended to cancel the host interference in the context of watermark decoding with unmatched filtering, where the reference sequence at the watermark decoder does not match with the embedded sequence. Then a robust and transparent audio watermarking scheme based on this extended ISS and a psychoacoustic model is proposed. Experimental results show that our scheme is robust against most of common attacks while preserving high audio quality.