Speech recognition apparatus

Details Speech recognition apparatus Speech recognition apparatus

1987-01-22

1988-11-08

Shoop, Jr., William M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 41, 364513, 3645135, G10L 500

Patent

active

047838060

ABSTRACT:
A partial pattern A.sub.(p,q) between time points "i" and "q" on the time base of an input pattern is obtained by a partial pattern forming section, on the basis of an input speech as detected by a speech detection section. A reference pattern memory section stores the reference pattern B.sup.n for every word number "n", which are previously set for every "n". A normalizing function, which depends on the time duration q-p+1 of the partial pattern as obtained by said partial pattern forming section and the time duration J.sub.n of the reference pattern as stored in the reference pattern memory section, provides a normalized similarity measure. The normalized similarity thus obtained is maximized by the dynamic programming algorithm in a partial maximum similarity computing section. The maximum value of the maximized result for "n" is obtained as a partial maximum similarity measure D.sub.q. In a similarity decision section, a registered word "n" providing the similarity measure D.sub.q is treated as a partial decision result W.sub.q, to obtain the partial maximum similarity measure D.sub. i and the partial decision result W.sub.i at every time point along the time series of the input pattern. In a recognition output section, the largest maximum similarity measure of those measures D.sub.i is treated as the maximum similarity measure D.sub.max, to obtain the partial decision result W.sub.i providing the D.sub.i. The decision result is output as the speech recognition result.

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patent: 4319085 (1982-03-01), Welch et al.
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patent: 4400788 (1983-08-01), Myers et al.
patent: 4516215 (1985-05-01), Hakaridani
patent: 4530110 (1985-07-01), Nojiri et al.
patent: 4667341 (1987-05-01), Watari

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