U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Recognition unit model training based on competing word and word string models

Patent 5579436 Issued on November 26, 1996. Estimated Expiration Date: Icon_subject November 26, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Rapidly training a speech recognizer to a subsequent speaker given training data of a reference speaker
Patent #: 4817156
Issued on: 03/28/1989
Inventor: Bahl ,   et al.

Method of optimizing a composite speech recognition expert
Patent #: 5280563
Issued on: 01/18/1994
Inventor: Ganong

Speech recognition system having word-based and phoneme-based recognition means Patent #: 5315689
Issued on: 05/24/1994
Inventor: Kanazawa, et al.

Inventors

Application

No. 030895 filed on 03/15/1993

US Classes:

704/244, Update patterns704/236, Specialized equations or comparisons704/256Markov

Examiners

Primary: Knepper, David D.

Attorney, Agent or Firm

International Classes

G10L 005/04
G10L 005/06

Abstract

A system pattern-based speech recognition, e.g., a hidden Markov model (HMM) based speech recognizer using Viterbi scoring. The principle of minimum recognition error rate is applied by the present invention using discriminative training. Various issues related to the special structure of HMMs are presented. Parameter update expressions for HMMs are provided.

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