发明名称 |
Method for generating a spectral noise weighting filter for use in a speech coder |
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<LxP. Thus, this method increases the control of a speech coder filter without a corresponding increase in the complexity of the speech coder.
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申请公布号 |
US5434947(A) |
申请公布日期 |
1995.07.18 |
申请号 |
US19930021364 |
申请日期 |
1993.02.23 |
申请人 |
MOTOROLA |
发明人 |
GERSON, IRA A.;JASIUK, MARK A.;HARTMAN, MATTHEW A. |
分类号 |
G10L19/06;G10L19/00;G10L19/04;G10L19/12;H03H17/00;H03H17/02;H03M7/30;H03M7/38;H04B14/04;(IPC1-7):G10L9/14 |
主分类号 |
G10L19/06 |
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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