发明名称 |
A voice detector. |
摘要 |
<p>A voice operated switch detects the presence of human speech by comparing the received electrical signals with a delayed version of themselves and assessing the degree of similarity which exists. The received signals are passed to a correlator 4, which compares undelayed signals applied to terminal 3 with delayed signals applied to terminal 5. If the degree of correlation as determined by a level detector exceeds a threshold value applied over terminal 12, a pulse generator 9 controls a switch 10 to enable the speech signals to be transmitted over a communication link 13 to 15. The sensitivity of the voice detector is dependent on three time durations T1, T2 and T3. Typical values of these durations are given.</p> |
申请公布号 |
EP0027343(A1) |
申请公布日期 |
1981.04.22 |
申请号 |
EP19800303509 |
申请日期 |
1980.10.06 |
申请人 |
THE MARCONI COMPANY LIMITED |
发明人 |
HEARD, MAURICE CLIFFORD;GREEN, STEPHEN GRAHAM |
分类号 |
G10L25/78;H04M9/10;(IPC1-7):04M9/10;04B1/10 |
主分类号 |
G10L25/78 |
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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