发明名称 |
Signal analyzing system |
摘要 |
An analog communication signal such as the signal transmitted over a telephone line is converted to digital form for storage in the memory of a computer. Segments of the digital representation of the signal are analyzed to determine whether or not the signal has uniform frequency components repeating at regular intervals. Detection of such regularly repeating uniform frequency components is useful in an automated telephone system to determine whether a telephone signal consists of voice or a call progress signal.
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申请公布号 |
US5070526(A) |
申请公布日期 |
1991.12.03 |
申请号 |
US19900564805 |
申请日期 |
1990.08.08 |
申请人 |
ACTIVE VOICE, INC. |
发明人 |
RICHMOND, ROBERT L.;ROBINSON, MICHAEL |
分类号 |
H04M3/527;H04M3/533;H04Q1/446;H04Q1/46 |
主分类号 |
H04M3/527 |
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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