Mori & Ward, LLP
Direct sound extraction device and reverberant sound extraction device
A direct sound extraction device includes: a spectrum transform unit that transforms an input signal, which includes a reverberant sound in a direct sound and on which a Fourier transform process has been performed, to a first amplitude spectrum signal Lfa; a low-pass filter unit (4) that performs a low-pass filtering process on the first amplitude spectrum signal Lfa for each frequency to generate a second amplitude spectrum signal Lfa1; a first subtraction unit (18) that calculates a third amplitude spectrum signal by subtracting the second amplitude spectrum signal Lfa1 from the first amplitude spectrum signal Lfa; and an inverse Fourier transform unit that generates a direct sound signal Lfd from a frequency spectrum signal calculated based on a phase spectrum signal and the third amplitude spectrum signal.
CLARION CO., LTD.
G H H H G H
G10L H04R H04R H04R G10L H04S
additional inventional additional additional inventional additional
Toshihiro Takeshi Tetsuo
Fueki Hashimoto Watanabe