Semi-automatic system for speaker identification (SAUSI)

A four vector computerized semi-automatic speaker identiflcation system has been developed. The ultimate purpose of this machine approach is to permit field identification of unknown talkers -- rather than to carry out speaker verification tasks in controlled environments. The four vectors presently utilized consist of 11-45 parameters each; they include analysis of 1) fundamental frequency (17-25 parameters) ; 2) power spectra (11-23 parameters) ; 3) vowel formants (32-45 parameters), and 4) temporal features (15-24 parameters). Vectors 1, 2, and 4 have been subjected to considerable laboratory analysis -- for both large and small populations and under both ideal and distorted conditions. Some testing of vector 3 and of combinations of vectors also has been conducted. The results have been encouraging and the combined identification power of these vectors, both in laboratory and field ("simucrimes") experiments, currently is under evaluation.