Method and means of detecting the presence of a signal represent

Details Method and means of detecting the presence of a signal represent Method and means of detecting the presence of a signal represent

1984-12-11

1985-10-29

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381106, G10L 100

Patent

active

045504261

ABSTRACT:
A circuit that combines the functions of audio compression and voice detection comprises an amplifier in a negative-feedback configuration in which the feedback signal is the product of the output of the amplifier and a syllabic voltage derived from that output. The syllabic voltage is compared with a threshold level to provide an output that is a measure of the presence of a voice signal. In an alternate embodiment, the syllabic voltage is compared with the sum of a threshold level and a detected syllabic voltage to generate a signal that is a measure of the presence of voice. The syllabic detector may be either an averaging detector or a valley detector.

REFERENCES:
patent: 3321581 (1967-05-01), Zryd et al.
patent: 3967209 (1976-06-01), Skoures et al.
patent: 4000369 (1976-12-01), Paul et al.
patent: 4066976 (1978-01-01), Dickopp et al.
patent: 4112384 (1978-09-01), Buckberger
patent: 4249042 (1981-02-01), Orban

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