发明名称 |
Speech detecting method |
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. |
申请公布号 |
US4401849(A) |
申请公布日期 |
1983.08.30 |
申请号 |
US19810227677 |
申请日期 |
1981.01.23 |
申请人 |
HITACHI, LTD. |
发明人 |
ICHIKAWA, AKIRA;HATAOKA, NOBUO;KITAZUME, YOSHIAKI;OHIRA, EIJI |
分类号 |
G10L11/00;G10L11/02;G10L15/04;(IPC1-7):G10L1/00 |
主分类号 |
G10L11/00 |
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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