Digital echo attenuator for telephone system

Details Digital echo attenuator for telephone system Digital echo attenuator for telephone system

H - Electricity

04

M

354/126, 379/64

H04M 1/74 (2006.01) H04B 3/20 (2006.01) H04M 3/18 (2006.01)

Patent

CA 1073136

DIGITAL ECHO ATTENUATOR FOR TELEPHONE SYSTEM Abstract of the Disclosure A digital echo attenuator for a two-wire-four-wire local telephone circuit in which each digital sample of the transmit and receive signals is compared directly and the results used to augment an accumulator. Once the accumulator reaches a certain threshold level, its output controls a digital pad to attenuate the receive signal and thereby prevent severe distortion and near singing effects. -i-

291341

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