ECHO CANCELLATION DEVICE, ECHO CANCELLATION SYSTEM AND ECHO CANCELLATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an echo cancellation device, echo cancellation system and echo cancellation method capable of performing echo cancellation at a high speed, even under various VoIP communication environments.;SOLUTION: The echo cancellation device 40 is applied to a speech communication system that is configured so as to use a voice output device and a voice input device which are configured as a body different from each other and perform speech communication by speech communication sound that is transmitted and received by applying VoIP. The echo cancellation device 40 has an echo-detecting and eliminating part for detecting and eliminating the echo of speech communication sound, transmitted and received by applying VoIP and a superimposing means for superimposing the detected sound that is detected more easily by the echo-detecting and elimination part than the speech communication sound on the speech communication sound.;COPYRIGHT: (C)2008,JPO&INPIT