发明公开
EP0899718A3 Nonlinear filter for noise suppression in linear prediction speech processing devices
有权
用于线性预测的语音编码装置的噪声抑制的非线性滤波器
- 专利标题： Nonlinear filter for noise suppression in linear prediction speech processing devices
- 专利标题（中）： 用于线性预测的语音编码装置的噪声抑制的非线性滤波器
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申请号： EP98202812.8申请日： 1998-08-21
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公开(公告)号： EP0899718A3公开(公告)日： 1999-10-13
- 发明人: Mermelstein, Paul
- 申请人： NORTHERN TELECOM LIMITED
- 申请人地址： World Trade Center of Montreal, 380 St. Antoine Street West, 8th Floor Montreal, Quebec H2Y 3Y4 CA
- 专利权人： NORTHERN TELECOM LIMITED
- 当前专利权人： NORTHERN TELECOM LIMITED
- 当前专利权人地址： World Trade Center of Montreal, 380 St. Antoine Street West, 8th Floor Montreal, Quebec H2Y 3Y4 CA
- 代理机构： Humphrey-Evans, Edward John
- 优先权： US920724 19970829
- 主分类号： G10L3/02
- IPC分类号： G10L3/02
摘要：
The invention relates to a linear prediction audio signal processing apparatus, such as a vocoder, including a nonlinear filter to attenuate the residual signal used to excite a linear prediction synthesis filter. The nonlinear filter is capable of reducing the noise component in the signal while keeping only the periodic component of the speech signal. This feature enhances speech quality. The invention also extends to a novel method for processing a residual signal used to excite a linear prediction synthesis filter in order to attenuate wide band additive noise in the speech signal as constructed by the synthesis filter.
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