Patent Document ID: 7529669
Application ID: 11762616
Patent Flag: 1

Claim One:
1. A voice-based multimodal speaker authentication method for verifying the identity of a user of telecommunications services comprising the steps of: adaptively training a model of an authorized user of the telecommunications services; said adaptively training comprising the steps of: extracting a phoneme independent background model from background data resulting from a diverse set of speakers; generating a phoneme-specific background model from the diverse set of speakers; generating a phoneme-specific speaker model for the authorized user; comparing the phoneme-specific background model and the phoneme-specific speaker model; and determining from the comparison relative discriminative abilities of the two models; establishing a telecommunications service between one or more users of the telecommunications service wherein the one or more users employ a voice-based communications method; determining after establishment of the telecommunications service between the one or more users whether the one or more users is the authorized user of the telecommunications services by authenticating the voice of the user; and disestablishing the established telecommunications service if the voice of the user is not the authorized user; identifying a number of distinguishing phonemes for the two models; generating text rich in the distinguishing phonemes; and prompting the authorized user with the generated text to further refine the models.