| 摘要 |
A background noise cancelling device for removing a background noise from an input signal in which the background noise is mixed in a voice signal to produce an output signal includes: storage a unit for preliminarily storing a predictable background noise, which is the background noise, as a stored background noise in a state in which a synchronization signal is superimposed on the predictable background noise; an estimation unit for reading the stored background noise from the storage unit and for correlating the read stored background noise and the input signal to establish synchronization by using the synchronization signal and to produce a predicted noise; and a subtracting unit for removing the predicted noise from the input signal to produce the voice signal obtained as a result of the removal.
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