Patent ID: 8306215
Filing Date: 2012-11-06
Classification: H04M,H04R

Abstract:
1. An echo canceller comprising an adaptive filter for using a receiver signal to generate a pseudo echo signal, which is used to eliminate an echo component from a transmitter signal, said echo canceller further comprising: a specific frequency component eliminator for eliminating a specific frequency component of a specific frequency from the receiver signal to output a resultant signal to an echo path; a specific frequency component detector for detecting a frequency component of a substantially same frequency as the specific frequency eliminated by said specific frequency component eliminator from the transmitter signal; a noise calculator for finding noise power on a basis of power of the specific frequency component detected by said specific frequency component detector, and finding total power including noise and an echo component on the basis of power of a frequency component including the echo component; and a control parameter calculator for using the noise power and the total power found by said noise calculator to find a control parameter of said echo canceller.