发明授权
US5696875A Method and system for compressing a speech signal using nonlinear
prediction
失效
使用非线性预测压缩语音信号的方法和系统
- 专利标题： Method and system for compressing a speech signal using nonlinear prediction
- 专利标题（中）： 使用非线性预测压缩语音信号的方法和系统
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申请号： US550724申请日： 1995-10-31
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公开(公告)号： US5696875A公开(公告)日： 1997-12-09
- 发明人: Shao Wei Pan , Shay-Ping Thomas Wang , Nicholas M. Labun
- 申请人： Shao Wei Pan , Shay-Ping Thomas Wang , Nicholas M. Labun
- 申请人地址： IL Schaumburg
- 专利权人： Motorola, Inc.
- 当前专利权人： Motorola, Inc.
- 当前专利权人地址： IL Schaumburg
- 主分类号： G10L19/02
- IPC分类号： G10L19/02 ; G10L9/14
摘要：
A speech signal is sampled to form a sequence of speech data. The sequence of speech data is segmented into overlapping segments. Speech coefficients are generated by fitting each segment to a nonlinear predictive coding equation. The nonlinear predictive coding equation includes a linear predictive coding equation with linear terms, and additionally includes at least one cross term that is proportional to a product of two or more of the linear terms. If the segment is voiced, a sinusoidal term is included in the nonlinear predictive coding equation and sinusoidal parameters are generated. Otherwise, a noise term is included in the nonlinear predictive coding equation. The speech coefficients, a voiced bit, and, if the segment is voiced, the sinusoidal parameters are included as compressed speech data.
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