发明名称 |
Echo canceller and method for controlling echo cancellation |
摘要 |
An echo canceller is disclosed which is capable of disabling its echo cancelling function when other echo cancellers are connected in tandem in a communications network. A pattern is inserted by extracting bits from a receiving side pulse code modulation (PCM) signal bit stream and replacing them with a predetermined bit-pattern sequence. When the predetermined bit-pattern sequence is detected at a transmission side input PCM signal bit stream, the echo cancelling function is disabled.
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申请公布号 |
US5533121(A) |
申请公布日期 |
1996.07.02 |
申请号 |
US19940301344 |
申请日期 |
1994.09.06 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
SUZUKI, SHIGEAKI;NAITO, YUSHI |
分类号 |
H04B3/23;(IPC1-7):H04M1/58 |
主分类号 |
H04B3/23 |
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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