Method of key-phase detection and verification for flexible spee

Details Method of key-phase detection and verification for flexible spee Method of key-phase detection and verification for flexible spee

1996-12-20

1998-08-18

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704240, 704255, 704257, G10L 900

Patent

active

057971234

ABSTRACT:
A key-phrase detection and verification method that can be advantageously used to realize understanding of flexible (i.e., unconstrained) speech. A "multiple pass" procedure is applied to a spoken utterance comprising a sequence of words (i.e., a "sentence"). First, a plurality of key-phrases are detected (i.e., recognized) based on a set of phrase sub-grammars which may, for example, be specific to the state of the dialogue. These key-phrases are then verified by assigning confidence measures thereto and comparing these confidence measures to a threshold, resulting in a set of verified key-phrase candidates. Next, the verified key-phrase candidates are connected into sentence hypotheses based upon the confidence measures and predetermined (e.g., task-specific) semantic information. And, finally, one or more of these sentence hypotheses are verified to produce a verified sentence hypothesis and, from that, a resultant understanding of the spoken utterance.

REFERENCES:
patent: 5509104 (1996-04-01), Lee et al.
patent: 5625748 (1997-04-01), McDonough et al.
patent: 5649057 (1997-07-01), Lee et al.
patent: 5675706 (1997-10-01), Lee et al.
patent: 5680511 (1997-10-01), Baker et al.

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