Apparatus and methods for speaker verification/identification/cl

Details Apparatus and methods for speaker verification/identification/cl Apparatus and methods for speaker verification/identification/cl

1999-03-24

2000-12-12

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704247, 704273, 704275, G10L 1700, G10L 1500

Patent

active

061610909

ABSTRACT:
A method of controlling access of a speaker to one of a service and a facility, the method comprising the steps of: (a) receiving first spoken utterances of the speaker, the first spoken utterances containing indicia of the speaker; (b) decoding the first spoken utterances; (c) accessing a database corresponding to the decoded first spoken utterances, the database containing information attributable to a speaker candidate having indicia substantially similar to the speaker; (d) querying the speaker with at least one question based on the information contained in the accessed database; (e) receiving second spoken utterances of the speaker, the second spoken utterances being representative of at least one answer to the at least one question; (f) decoding the second spoken utterances; (g) verifying the accuracy of the decoded answer against the information contained in the accessed database serving as the basis for the question; (h) taking a voice sample from the utterances of the speaker and processing the voice sample against an acoustic model attributable to the speaker candidate; (i) generating a score corresponding to the accuracy of the decoded answer and the closeness of the match between the voice sample and the model; and (j) comparing the score to a predetermined threshold value and if the score is one of substantially equivalent to and above the threshold value, then permitting speaker access to one of the service and the facility.

REFERENCES:
patent: 5897616 (1999-04-01), Kanevsky et al.

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