发明授权
US5434947A Method for generating a spectral noise weighting filter for use in a
speech coder
失效
用于产生用于语音编码器的频谱噪声加权滤波器的方法
- 专利标题: Method for generating a spectral noise weighting filter for use in a speech coder
- 专利标题(中): 用于产生用于语音编码器的频谱噪声加权滤波器的方法
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申请号: US21364申请日: 1993-02-23
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公开(公告)号: US5434947A公开(公告)日: 1995-07-18
- 发明人: Ira A. Gerson , Mark A. Jasiuk , Matthew A. Hartman
- 申请人: Ira A. Gerson , Mark A. Jasiuk , Matthew A. Hartman
- 申请人地址: IL Schaumburg
- 专利权人: Motorola
- 当前专利权人: Motorola
- 当前专利权人地址: IL Schaumburg
- 主分类号: G10L19/12
- IPC分类号: G10L19/12 ; H03H17/00 ; H03H17/02 ; H03M7/30 ; H03M7/38 ; H04B14/04 ; G10L9/14
摘要:
An Rth-order filter models the frequency response of multiple filters, to provide a filter which offers the control of multiple filters without the complexity of multiple filters. The Rth-order filter can be used as a spectral noise weighting filter or a combination of a short-term predictor filter and a spectral noise weighting filter, referred to as the spectrally noise weighted synthesis filter, depending on which embodiment is employed. In general, the method models the frequency response of L Pth-order filters by a single Rth-order filter, where the order R
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