Acoustic echo canceller

A sound echo cancellation device for canceling echo e in microphone signal z according to the 1st input signal s and 2nd input signal m, 1st joint unit 13 constituted so that 1st input signal s might be combined with 2nd input signal m to make intensive input signal x, Adaptation filter unit 11 constituted so that intensive input signal x might be filtered and intensive echo cancellation signal y might be generated, Either 2nd joint unit 14 constituted so that intensive echo cancellation signal y might be combined with microphone signal z and residual signal r might be generated, or the 1st input signal s or 2nd input signal m is filtered, and it is 1st partial echo cancellation signal y, respectively.sOr 2nd partial echo cancellation signal ymIt has further filter unit 12 constituted so that it might generate, and post processor unit 15 constituted so that the remaining echo ingredients in residual signal r might be abbreviated-controlled. Post processor 15 is partial echo cancellation signal y.s;ymUsing at least 1 の side, it is constituted so that an echo ingredient corresponding to 1st input signal s may be controlled more greatly than an echo ingredient corresponding to 2nd input signal m.