Speaker verification system

摘要

In a speaker verification system, a method of generating reference data includes analyzing a plurality of example utterances of a speaker to be enrolled in the system to provide a matrix of averaged cepstral coefficients representing the utterances. This matrix is compared with matrices of cepstral coefficients derived from test utterances of the speaker and of other speakers to determine, by use of a genetic algorithm process, the coefficients of a weighting vector to be used in the comparison. The reference data, including the matrix of average cepstral coefficients and the coefficients of the genetic algorithm derived weighting vector are recorded on a user's card for subsequent use by the speaker when desiring service from a self-service terminal.