Echo-canceling apparatus, an echo-canceling method, a program and a recording medium

摘要: Echo-canceling apparatus of the invention includes transfer function estimation unit which estimates a corresponding to reverberation room attached voice after it is output from loudspeaker and before input microphone, first filter operates using function, subtraction subtracts signal second copied in case accuracy high, singing detection detects singing, notch notches specific frequency band component received far-end speaker, switch selects between speaker processed by not unit.