Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1984-11-08
1989-04-11
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 41, G10L 500
Patent
active
048213250
ABSTRACT:
An arrangement for endpoint detection improves speech recognition accuracy where the input signal includes nonstationary noise. Energy pulses are found by looking for local energy level peaks, then analyzing surrounding energy levels to determine pulse boundaries. Energy pulses are combined according to predetermined criteria to form longer pulses corresponding to words or phrases in the input signal.
REFERENCES:
patent: 3619509 (1971-11-01), Barger et al.
patent: 3679830 (1972-07-01), Uffelman et al.
patent: 3909532 (1975-09-01), Rabiner
patent: 4032710 (1977-06-01), Martin
patent: 4357491 (1982-11-01), Daaboul
patent: 4370521 (1983-01-01), Johnston
"An Algorithm for Determining the Endpoints of Isolated Utterances", The Bell System Technical Journal, vol. 54, No. 2, Feb. 1975, pp. 297-315.
Martin Thomas B.
Rabiner Lawrence R.
Wilpon Jay G.
American Telephone and Telegraph Company AT&T Bell Laboratories
Kemeny Emanuel S.
Knepper David D.
Wisner Wilford L.
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