发明授权
- 专利标题： Speech detecting method
- 专利标题（中）： 语音检测方法
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申请号： US227677申请日： 1981-01-23
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公开(公告)号： US4401849A公开(公告)日： 1983-08-30
- 发明人: Akira Ichikawa , Nobuo Hataoka , Yoshiaki Kitazume , Eiji Ohira
- 申请人： Akira Ichikawa , Nobuo Hataoka , Yoshiaki Kitazume , Eiji Ohira
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX55-5690 19800123
- 主分类号： G10L11/00
- IPC分类号： G10L11/00 ; G10L11/02 ; G10L15/04 ; G10L1/00
摘要：
Speech signal presence is decided if total signal power is above a first threshold, and if either low or high frequency components exceed thresholds as a large fraction of the total power. Total power is calculated as the zero-order auto-correlation coefficient, and fractional power of frequency components is calculated as the first-order partial auto-correlation coefficient.
公开/授权文献
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