Patent Document ID: 8099288
Application ID: 11674139

Base Claim:
1. A computer-implemented process for verifying the identity of a speaker, comprising: using a computing device for: asking a speaker to repeat a pass phrase; adapting a trained speaker-independent model to create a speaker-specific model without requiring retraining of the trained speaker-independent model to be used in verifying that the pass phrase is spoken by a specific speaker using a Maximum Likelihood Linear Regression procedure in a text-dependent manner; inputting a speech signal containing a pass phrase as spoken by a user who claims to be a specific speaker, wherein the speaker was not asked to repeat the pass phrase; extracting features from the speech signal; inputting the features and the speaker-independent model into a speech recognizer and outputting a first recognizer score; inputting the features and the speaker-specific model into a speech recognizer and outputting a second recognizer score; and using the first and second recognizer scores to determine if the pass phrase is spoken by the specific speaker.

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Claim 4:
4. The computer-implemented process of claim 1 wherein certain portions of the input speech signal containing the pass phrase are weighted while using the first and second recognizer scores to determine if the pass phrase is spoken by the specific speaker.