Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
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.
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Barnes Michael F.
Fergus George H.
Gillig Steven F.
Berry Thomas G.
Kemeny E. S. Matt
Motorola Inc.
Southard Donald B.
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