Acoustic echo canceller

摘要: An acoustic echo canceller for cancelling an component produced when a signal on receiving communication line appears transmitting via path. In the canceller, variable coefficient series is divided into blocks, among which selected block requiring correction amount update operation conforming to attenuation characteristic of impulse response in sound field. A fitted field set block. Therefore, convergence speed degradation cancellation involved can be compensated, and even if path fluctuates, excellent follow-up provided, so that stable high-speed always executed.