Speech recognition system

Details Speech recognition system Speech recognition system

1987-11-05

1989-05-09

Salce, Patrick R.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 43, 381 45, 3645135, G10L 708

Patent

active

048295728

ABSTRACT:
The present invention provides a system for recognizing speech in which a profile is constructed of a related characteristic of each significant phoneme in a language. A difference profile is generated for each pair of significant phonemes by subtracting the profile of each phoneme from the profile of each other phoneme. Adjacent sections of each difference profile which exceed positive and negative thresholds are identified. The likelihood that an unknown phoneme will be one or the other of a phoneme pair based on the relative areas in the identified sections of the difference profile is computed. An equivalent profile is constructed of a phoneme of an unknown utterance. The most likely phoneme of each phoneme pair is chosen based on the relative areas in the identified sections of the profile of the unknown phonemes.

REFERENCES:
patent: 3909532 (1975-09-01), Rabiner et al.
patent: 3978287 (1976-08-01), Fletcher et al.
patent: 4519094 (1985-05-01), Brown
patent: 4716593 (1987-12-01), Hirai et al.

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