An acoustic echo canceler includes a first analysis filter bank (802) for dividing a reception signal (2) into a plurality of bands, a plurality of adaptive filters (100 to 103) for producing false echo signals from the reception signal (2) for the bands, a second analysis filter bank (801) for dividing an input signal (1) into a plurality of bands, a plurality of subtractors (200 to 203) for subtracting the false echo signals from the input signal (1) for the bands, and a synthesis filter bank (901) for synthesizing outputs of the subtractors (200 to 203). Further, a band information calculation section (300) is provided for estimating influences of the echoes for the bands and determining a priority order based on the estimation. Each adaptive filter (100 to 103) determines processing to be executed thereby based on the priority order. <IMAGE>
Sub-band acoustic echo canceller