发明名称 |
DIRECT SOUND EXTRACTION DEVICE AND REVERBERANT SOUND EXTRACTION DEVICE |
摘要 |
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 (10) 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. |
申请公布号 |
US2014044273(A1) |
申请公布日期 |
2014.02.13 |
申请号 |
US201214112941 |
申请日期 |
2012.06.14 |
申请人 |
HASHIMOTO TAKESHI;WATANABE TETSUO;FUEKI TOSHIHIRO;CLARION CO., LTD. |
发明人 |
HASHIMOTO TAKESHI;WATANABE TETSUO;FUEKI TOSHIHIRO |
分类号 |
H04R3/02 |
主分类号 |
H04R3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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