Performance Analysis of Spread Spectrum CDMA Watermarking and Applied Research in Multiwavelet Domain
Yan Zhu · Chinese Journal of Computers · 2005
By means of the theory analysis of encoding and detection methods in spread spectrum Code Division Multiple Access (CDMA) watermarking model, this paper illuminates the correlations among embedded information number, spreading code length and detection error probability, and these conclusions are compared and verified with experimentations. Furthermore, taking advantage of well-defined statistical distribution of multiwavelet coefficients and visual masking model in image multiwavelet domain, this paper presents a novel spread spectrum CDMA watermarking scheme based on multiwavelet transform. Comparing the theoretical results with the empirical data obtained by experimentation, the research demonstrates that the proposed model and algorithm provide higher embedding capacity, as well as more robust and secure against attacks.