Speech recognition system

Details Speech recognition system Speech recognition system

1989-01-26

1989-11-21

Kemeny, Emamuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

3645135, G10L 500

Patent

active

048827576

ABSTRACT:
Speech recognition is improved using prestored words and prestored sentences which provide grammar or context rules. Multiple word hypotheses and plural sentence hypotheses are used.
A speech recognition system uses a word hypothesizer to generate hypothesized words for a sentence recognizer. The sentence recognizer receives information containing the hypothesized word and its beginning and end points. The sentence recognizer compares each incoming hypothesis with words allowed by a grammar, and generates a partial or complete sentence hypothesis for each state in which the hypothesis is allowed by the grammar. A dynamic programming technique using backpointer is used to retain all currently valid partial and complete sentence hypotheses. When a complete sentence satisfies suitable criteria, it is output as a recognized sentence. Gaps and overlaps between hypothesized words are used in calculation of a sentence error for each partial and complete sentence hypothesis.

REFERENCES:
patent: 4156868 (1979-05-01), Levinson
patent: 4277644 (1981-07-01), Levinson et al.
patent: 4319221 (1982-03-01), Sakoe
patent: 4489435 (1984-12-01), Mosher
patent: 4624008 (1986-11-01), Vensko et al.

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