Abstract: A method for setting the false acceptance (FA) rate of an individual voiceprint used for enrolling a user with a voice biometric authentication system, the individual voiceprint derived from a Universal Background Model (UBM) selected by the system, the method comprising: (a) selecting a cohort of impostor voice files containing voice samples spoken by persons other than the enrolling user; (b) determining one or more acoustic feature files for each voice file in the selected cohort of impostor voice files; (c) determining, for each acoustic feature files, the top n GMM mixture components for the selected Universal Background Model (UBM); (d) scoring the acoustic features against only the corresponding top n mixture components in the individual voiceprint to generate a distribution of impostor scores; and (e) setting the FA rate for the individual voiceprint based on the resultant distribution.

Abstract: A method for maintaining a voiceprint utilizable to authenticate a user comprises associating a trainable universal background model with the user. A voiceprint for the user is generated utilizing the trainable universal background model and at least one enrollment voice sample provided by the user. The trainable universal background model is subsequently trained with additional voice samples provided by the user post enrollment that satisfy predefined adaptation criteria. The voiceprint is regenerated responsive to a change to the trainable universal background model.

Abstract: A method for configuring a voice authentication system comprises ascertaining a measure of confidence associated with a voice sample enrolled with the authentication system. The measure of confidence is derived through simulated impostor testing carried out on the enrolled sample.

Abstract: A method for enrolling a user with a voice authentication system comprises obtaining a voice sample which has been used to authenticate a user using a first authentication process. The voice sample is subsequently utilised to enroll the user with an authentication system implementing a second authentication process.

Abstract: A method for configuring a voice authentication system comprises ascertaining a measure of confidence associated with a voice sample enrolled with the authentication system. The measure of confidence is derived through simulated impostor testing carried out on the enrolled sample.