Quasi-Orthogonal Structured Mersenne Matrices for Masking Digital Video and Audio Data in Distributed Systems

The paper considers quasi-orthogonal Mersenne matrices structured according to Walsh. The differences between the system of orthogonal Mersenne-Walsh functions and classical Walsh functions are shown. Two- and four-level (modularly two-level) Mersenne-Walsh matrices are considered. Estimates of their use in image compression and masking and protective encoding of digital audio data are given.