5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

A Novel Technique for the Combination of Utterance and Speaker Verification Systems in a Text-Dependent Speaker Verification Task

Leandro Rodriguez-Linares, Carmen Garcia-Mateo

University of Vigo, Spain

In this paper we present a novel technique for combining a Speaker Verification System with an Utterance Verification System in a Speaker Authentication system over the telephone. Speaker Verification consists in accepting or rejecting the claimed identity of a speaker by processing samples of his/her voice. Usually, these systems are based on HMM's that try to represent the characteristics of the talkers' vocal tracts. Utterance Verification systems make use of a set of speaker-independent speech models to recognize a certain utterance and decide whether a speaker has uttered it or not. If the utterances consist of passwords, this can be used for identity verification purposes. Up to now, both techniques have been used separately. This paper is focused on the problem of how to combine these two sources of information. A new architecture is presented to join an utterance verification system and a speaker verification system in order to improve the performance in a text-dependent speaker verification task.

Full Paper

Bibliographic reference.  Rodriguez-Linares, Leandro / Garcia-Mateo, Carmen (1998): "A novel technique for the combination of utterance and speaker verification systems in a text-dependent speaker verification task", In ICSLP-1998, paper 1084.