发明授权
- 专利标题： Method and apparatus for noise reduction by filtering based on a maximum signal-to-noise ratio and an estimated noise level
- 专利标题（中）： 基于最大信噪比和估计的噪声水平通过滤波降噪的方法和装置
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申请号： US606001申请日： 1996-02-12
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公开(公告)号： US6032114A公开(公告)日： 2000-02-29
- 发明人: Joseph Chan
- 申请人： Joseph Chan
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-029336 19950217
- 主分类号： G10L11/02
- IPC分类号： G10L11/02 ; G10L15/04 ; G10L15/20 ; G10L19/02 ; G10L21/02 ; G10L3/02
摘要：
A method for reducing the noise in an speech signal by removing the noise from an input speech signal is disclosed. The noise reducing method includes converting the input speech signal into a frequency spectrum, determining filter characteristics based upon a first value obtained on the basis of the ratio of a level of the frequency spectrum to an estimated level of the noise spectrum contained in the frequency spectrum and a second value as found from the maximum value of the ratio of the frame-based signal level of the frequency spectrum to the estimated noise level and the estimated noise level, and reducing the noise in the input speech signal by filtering responsive to the filter characteristics. A corresponding apparatus for reducing the noise is also disclosed.
公开/授权文献
- US5103922A Fishtail expendable diamond drag bit 公开/授权日：1992-04-14