An echo canceller (10) includes an analysis filter bank (24) for dividing a send-input signal (SI) and a receive-input signal (RI) into subband send-input signals (SC1-SC16) and subband receive signals (RC1- RC16). Each of the subband receive signals (RC1-RC16) is convolved with an impulse response function pertaining the echo path coupling the receive signal to the send-input signal within each subband, yielding estimated echo signals (EC1-EC16), which are then each subtracted from the corresponding subband send-input signal, to produce error signals (ER1-ER16). Residual echo components within the err or signals are attenuated by a variable attenuator (36a-p), and a choice component is injected into each attenuated error signal to compensate for attenuation of background noise incidental to the variable attenuation of the error signals.
SPECTRAL NOISE COMPENSATION FOR ECHO CANCELLATION