Echo cancellation device, echo cancellation method and echo cancellation program

摘要

Problem to be solved: to perform an echo canceling process with respect to a plurality of speakers having different frequency bands to be reproduced and to reduce the load of the processing.Solution: a signal from the microphone 18 with the outputs of the speakers 16 and 17 having different frequency bands reproduced from each other is obtained.The signal components having different frequency bands are transmitted through the filters 101 and 102 among the input audio data.The signal components of different frequency bands are respectively delayed from the speakers 16 and 17, respectively, based on the arrival time of the sound from the speakers 16 and 17 to the microphone 18, and the level of the signal component in the frequency band which is not included in the sound data is changed and added. A signal corresponding to the addition data is outputted to the speakers 16 and 17.The removal processing unit 105 uses the audio data as reference data and removes the components corresponding to the reference data from the input digital data corresponding to the signal acquired from the microphone 18.Diagram