| 摘要 |
PROBLEM TO BE SOLVED: To provide an echo canceller, karaoke machine, echo canceling method and program capable of calculating a transfer function from a speaker to a microphone even while a singer is singing. SOLUTION: A karaoke machine 1 determines whether a double talk state or a single talk state in each frequency of an input signal based on the input signal generated in a voice input part 17, and a transfer function can be calculated based on the input signal of the frequency in the single talk state. At this moment, the frequency in the single talk state varies at any time due to a fundamental frequency of singing varying at any time, so that all frequencies required for calculating the transfer function become the single talk state within a prescribed time elapse, and the transfer function in each frequency can be calculated even while singing. COPYRIGHT: (C)2009,JPO&INPIT
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