Telecommunications – Transmitter and receiver at separate stations – With control signal
Patent
1978-12-18
1982-02-02
Orsino, Jr., Joseph A.
Telecommunications
Transmitter and receiver at separate stations
With control signal
455115, 455217, 455232, H04B 304
Patent
active
043143725
ABSTRACT:
A sound transmission and reproduction system including at the transmitter side means for producing a non-audible control signal indicative of a predetermined character of the transmitted sound, preferably the intensity of the sound as actually transmitted, whereby the transmitted sound may be artificially attenuated and amplified, respectively, in respective passages of high and low intensity so as to be transmittable within a restricted dynamic range. At the receiver side the control signal is detected and used for controlling the amplifier as an automatic volume control so as to effect extra amplification of the attentuated passages and attenuation of the artificially amplified passages so as to enable the reproduction to take place with the full dynamic range of the original sound. The control signal may serve to control other parameters of the reproduction, such as to actuate switch means for shifting between two or more general amplification levels or tone control settings according to the type of the sound being transmitted.
REFERENCES:
patent: 3174100 (1965-03-01), Orr, Jr.
patent: 3859597 (1975-01-01), Zwaal
Band & Olufsen A/S
Chin Tommy P.
Orsino Jr. Joseph A.
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