Patent ID: 7860235
Filing Date: 2010-12-28
Classification: H04M

Abstract:
1. An echo suppressor comprising: a received power calculating unit to calculate received power of a received signal every predetermined time; a sending power calculating unit to calculate sending power of a sending signal every predetermined time; a receiving detection value calculating unit to calculate a receiving detection value based on the calculated received power; a sending detection value calculating unit to calculate a sending detection value based on the calculated sending power; a received signal attenuating unit to attenuate the received signal; a sending signal attenuating unit to attenuate the sending signal; and a state determining unit to determine that a state is a receiving state when the calculated received power is larger than the receiving detection value and larger than the calculated sending power, and to determine that the state is a sending state when the calculated sending power is larger than the sending detection value and larger than the calculated received power, thereby controlling attenuation processing operations of the received signal attenuating unit and the sending signal attenuating unit based on the determination results.