Bernoulli shift generated chaotic watermarks: theoretic investigation
The paper statistically analyzes the behaviour of chaotic watermark signals generated by n-way Bernoulli shift maps. For this purpose, a simple blind copyright protection watermarking system is considered. The analysis involves theoretical evaluation of the system detection reliability, when a correlator detector is used. The aim of the paper is twofold: (i) to introduce the n-way Bernoulli shift generated chaotic watermarks and theoretically contemplate their properties with respect to detection reliability and (ii) to establish theoretically their potential superiority against the widely used pseudorandom watermarks. Experimental verification of the theoretical analysis results is also performed.