发明名称 |
Techniques for Implementing Adaptation Control of an Echo Canceller to Facilitate Detection of In-Band Signals |
摘要 |
A technique for detecting in-band signaling tones in a communication system includes performing a first adaptation of an adaptive filter of an echo canceller in response to detection of a far-end harmonic signal. In this case, the adaptive filter provides an echo estimation signal. The technique also includes subtracting the echo estimation signal from a near-end signal that includes one or more in-band signaling tones to provide an error signal. The technique further includes detecting, using a tone detector, the one or more in-band signaling tones in the error signal.
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申请公布号 |
US2011261949(A1) |
申请公布日期 |
2011.10.27 |
申请号 |
US20100768366 |
申请日期 |
2010.04.27 |
申请人 |
FREESCALE SEMICONDUCTOR, INC. |
发明人 |
DYBA ROMAN A.;SU WEN WU;DENG HONGYANG |
分类号 |
H04M9/08 |
主分类号 |
H04M9/08 |
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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