Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Reexamination Certificate
2005-01-04
2005-01-04
Harvey, Minsun Oh (Department: 2644)
Electrical audio signal processing systems and devices
Including amplitude or volume control
Automatic
C455S234100, C455S063100
Reexamination Certificate
active
06839440
ABSTRACT:
The invention provides a method for controlling a level of a voice signal to reduce the noise which is superimposed on a voice signal without marring the content of the voice signal. To achieve the invention, the tracking signal is formed corresponding to a received RF signal strength. The tracking signal is reduced to together with the decrease of the received RF signal strength if the received RF signal strength decreases. The tracking signal increases at a constant rate gradually if the received RF signal strength increases. A level of a voice signal is controlled by a function corresponding to the tracking signal.
REFERENCES:
patent: 5758271 (1998-05-01), Rich
Harvey Minsun Oh
Mimura Junichi
Oki Electric Industry Co. Ltd.
Pendleton Brian T.
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