Speech recognition system

Details Speech recognition system Speech recognition system

1987-02-27

1989-11-14

Miska, Vit W.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 46, G10L 506, G10L 300

Patent

active

048812668

ABSTRACT:
In a speech recognition system for recognizing speeches uttered by non-specific speakers, start and end points of a word or speech interval are determined by a novel preprocessor for searching a sound power level to obtain speech boundary candidates and for determining likelihoods of speech or word intervals on the basis of the boundary candidates. Since likelihoods (probabilities) are determined for speech interval candidates, the similarity rate between feature parameters and reference pattern set of a speech signal are calculated for only the higher likelihood candidates, thus improving the accuracy and the speed of speech recognition. A percentage of erroneous boundary decision is about 0.5% when two speech interval candidates of the first and second likelihoods are adopted.

REFERENCES:
patent: 3770892 (1973-11-01), Clapper
patent: 4720802 (1988-01-01), Damoulakis et al.
IEEE Transactions on Acoustics, Speech & Signal Processing; vol. ASSP-29, No. 4, Aug. 1981; pp. 777-785.
COMPCON 79, 19th IEEE Computer Society International Conference; 4th-7th Sep. 1979, Washington, D.C.; pp. 392-395.
AT&T Bell Laboratories Technical Journal, vol. 63, No. 3, Mar. 1984, pp. 479-498.
The Bell System Technical Journal, vol. 54, No. 2, Feb. 1975; pp. 297-315.

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