Correlative method of experimental analysis of speech masking efficiency function

Abstract

Method of digital correlative signal processing of leakage channel is analyzed. The given method allows to obtain analytical estimation of the parameter of additive speech masking function by means of computation correlation factor of power spectral densities at quasistationary time intervals of test and masking phonemes signal. The suggested method allows to use, as test signals, key words, uttered by the announcers and, in such a way, adapt spectral density of masking signal power for hiding information, contained in speech signal of limited number of interlocutors. The results of experimental research confirm the efficiency of the method.