发明名称 |
DISPOSITIVO DE DETECCAO DE SINAIS VOCAIS E SISTEMA DE ALTERANTO IMPORTANTE DESTE DISPOSITIVO |
摘要 |
A detection apparatus for receiving an input signal containing noise and for detecting the presence of voice signals therein comprises means for attenuating the input signal and a comparator of the amplitude of the attenuated input signal relative to a variable threshold voltage. This threshold voltage is generated by control means which make the threshold voltage dependent on the peak amplitude value of the input signal. A control signal corresponding to the detection of voice signals is supplied by decision means which carry out a time analysis of the output signal of the comparator. |
申请公布号 |
BR8006225(A) |
申请公布日期 |
1981.04.07 |
申请号 |
BR19808006225 |
申请日期 |
1980.09.26 |
申请人 |
THOMSON CSF |
发明人 |
DUMONT F |
分类号 |
G10L11/02;H03G3/32;(IPC1-7):G10L1/00 |
主分类号 |
G10L11/02 |
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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