| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifying conversation device, method and program, in which a sound volume can be automatically controlled for each microphone not degrading follow-up performance, without increasing a calculation amount of an adapted filter or a memory amount. SOLUTION: The amplifying conversation device includes a main channel estimating section 430 for estimating one or more microphones to be a main channel, an addition section 440 for adding a collected sound as a sound signal, an echo cancel section 450 for canceling echo of the added sound signal, a sound detecting section 461 for detecting sound from the echo-canceled sound signal, a superposition gain calculating section 462 for setting an initial value based on the main channel when sound is detected and calculating a superposition gain using the initial value and the echo-canceled sound signal, a gain superposing section 463 for superposing the superposition gain and the echo-canceled sound signal, and a superposition gain storing section 464 for respective channels for storing the superposition gain corresponding to the main channel. COPYRIGHT: (C)2011,JPO&INPIT
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