发明名称 |
Digital filter circuit, digital filter program and noise canceling system |
摘要 |
Disclosed herein is a digital filter circuit for producing a noise reduction signal for reducing noise based on a noise signal outputted from a microphone which collects the noise, including: an analog/digital conversion section; a first digital filter section; an arithmetic operation processing section; a second digital filter section; and a digital/analog conversion section. The first digital filter section and/or the second digital filter section are configured such that a predetermined attenuation amount is obtained within a predetermined range in the proximity of a sampling frequency around the sampling frequency.
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申请公布号 |
US8452022(B2) |
申请公布日期 |
2013.05.28 |
申请号 |
US20070875374 |
申请日期 |
2007.10.19 |
申请人 |
ASADA KOHEI;SONY CORPORATION |
发明人 |
ASADA KOHEI |
分类号 |
A61F11/06;H03B29/00;H03M3/00;H03M7/00;H04B15/00 |
主分类号 |
A61F11/06 |
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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