Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Patent
1997-08-22
1999-06-15
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
704250, 704244, G10L 506, G10L 900
Patent
active
059131926
ABSTRACT:
A speaker identification system includes a speaker-independent phrase recognizer. The speaker-independent phrase recognizer scores a password utterance against all the sets of phonetic transcriptions in a lexicon database to determine the N best speaker-independent scores, determines the N best sets of phonetic transcriptions based on the N best speaker-independent scores, and determines the N best possible identities. A speaker-dependent phrase recognizer retrieves the hidden Markov model corresponding to each of the N best possible identities, and scores the password utterance against each of the N hidden Markov models to generate a speaker-dependent score for each of the N best possible identities. A score processor coupled to the outputs of the speaker-independent phrase recognizer and the speaker-dependent phrase recognizer determines a putative identity. A verifier coupled to the score processor authenticates the determined putative identity.
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patent: 5579436 (1996-11-01), Chou
"Cepstral Channel Normalization Techniques for HMM-Based Speaker Verification" by Rosenberg, Lee and Soong, Proc. 1994 International Conf. on Spoken Language Processing, pp. 1835-1838, Yokohama, Japan (1994) (four pages).
"The Segmental K-Means Algorithm for Estimating Parameters of Hidden Markov Models" by Juang and Rabiner, reprinted from IEEE transactions on Acoustics, Speech, and Signal Processing, v. 38, No. 9, pp. 1639-1641 (Sep. 1990) (four pages).
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Parthasarathy Sarangarajan
Rosenberg Aaron Edward
AT&T Corp
Hudspeth David R.
Sax Robert Louis
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