发明名称 |
POST FILTER FOR MICROPHONE ARRAY |
摘要 |
A post-filter includes a microphone array (10) including at least two microphones to which a voice signal are input, a beam former (13) which forms the voice signal input from the microphone array, a divider (14) which divides a target sound containing noise input from the microphone array into at least two frequency bands at a predetermined frequency, a first filter (20) which estimates the filter gain with the noise non-correlated between the microphones, a second filter (30) which estimates a filter gain of one microphone of the microphone array or an average signal of the microphone array, an adder (40) which adds the outputs from the first and second filters to each other, and means (41) for reducing the noise based on the outputs from the adder and the beam former.
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申请公布号 |
EP1931169(A1) |
申请公布日期 |
2008.06.11 |
申请号 |
EP20060797189 |
申请日期 |
2006.08.31 |
申请人 |
JAPAN ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
AKAGI, MASATO;LI, JUNFENG;UECHI, MASAAKI;SASAKI, KAZUYA |
分类号 |
H04R3/00;G10L15/20;G10L21/02;H04R1/40 |
主分类号 |
H04R3/00 |
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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