A Robust Watermarking Scheme In Direct Sequence CDMA Based On Orthogonal PN Sequence

摘要

In this paper ,We introduced a novel method DS-CDMA based watermarking scheme on the basis of orthogonal pseudorandom sequence subspace projection, In this paper a new idea to eliminate the correlation between the code sequences and the host images in the w atermark extraction phase, and in watermarking scheme improve the hiding capacity of message sequence. In our proposed scheme implements the steps and performance checking under different attacks by a series of experiments. The results observe the Host image under different attacks and show the higher robustness and achieve the high capacity to hide the data