Noise signal level control in a tasi system

Details Noise signal level control in a tasi system Noise signal level control in a tasi system

H - Electricity

04

J

363/1

H04J 3/17 (2006.01)

Patent

CA 1149524

NOISE SIGNAL LEVEL CONTROL IN A TASI SYSTEM Abstract of the Disclosure Speech signals from a plurality of channels are interpolated in a TASI system for transmission via a lesser plurality of transmission facilities, such as telephone tie-lines which carry analog voice frequency signals. Recurrently, the level of noise received via each facility is measured at a receiver of the system while the facility is idle. An average of the monitored noise levels for all facilities, which is recurrently updated, is used to control the level of a noise signal which is supplied by the receiver to each off-hook channel for which speech signals are not being received via the facilities.

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