发明授权
- 专利标题： Test signalling
- 专利标题（中）： 测试信号
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申请号： US10275475申请日： 2001-05-10
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公开(公告)号： US07978613B2公开(公告)日： 2011-07-12
- 发明人: Philip Gray , Michael P Hollier , Richard JB Reynolds , Antony W Rix
- 申请人： Philip Gray , Michael P Hollier , Richard JB Reynolds , Antony W Rix
- 申请人地址： GB
- 专利权人： British Telecommunications public limited company
- 当前专利权人： British Telecommunications public limited company
- 当前专利权人地址： GB
- 代理机构： Bourque and Associates
- 优先权： EP00304497 20000526
- 国际申请： PCT/GB01/02050 WO 20010510
- 国际公布： WO01/93470 WO 20011206
- 主分类号： H04J3/14
- IPC分类号： H04J3/14 ; H04M3/26 ; H04B17/00 ; G10L15/20 ; G01R31/00
摘要：
The degree of degradation imposed on signals transmitted over a communications link from a transmitter to a receiver is tested. A predetermined test signal is transmitted using spare capacity detected by a voice activity detector when no speech is to be transmitted over the communications link. The test signal received by the receiver is compared with the reference signal, and a measure of the degradation of signals caused by the communications link is generated therefrom.
公开/授权文献
- US20030092394A1 Test signalling 公开/授权日：2003-05-15
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