| 摘要 |
In an object sound extraction apparatus, one or more reference sound separation signals corresponding to one or more reference sounds other than an object sound are separated and generated on the basis of a main acoustic signal and one or more sub acoustic signals. A signal level of the reference sound separation signal is detected. When the detected signal level is within a predetermined range, a frequency spectrum of a reference sound corresponding signal is compressed and corrected at a large compression ratio as the detected signal level becomes small, and the frequency spectrum of the reference sound corresponding signal obtained by the compression and correction is subtracted from a frequency spectrum of an object sound corresponding signal corresponding to the main acoustic signal. The acoustic signal corresponding to the object sound is extracted from the object sound corresponding signal and the acoustic signal is outputted.
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