发明授权
US08787561B2 Techniques for implementing adaptation control of an echo canceller to facilitate detection of in-band signals
有权
用于实现回波消除器的自适应控制以便于检测带内信号的技术
- 专利标题： Techniques for implementing adaptation control of an echo canceller to facilitate detection of in-band signals
- 专利标题（中）： 用于实现回波消除器的自适应控制以便于检测带内信号的技术
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申请号： US12768366申请日： 2010-04-27
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公开(公告)号： US08787561B2公开(公告)日： 2014-07-22
- 发明人: Roman A. Dyba , Wen Wu Su , Hongyang Deng
- 申请人： Roman A. Dyba , Wen Wu Su , Hongyang Deng
- 申请人地址： US TX Austin
- 专利权人： Freescale Semiconductor, Inc.
- 当前专利权人： Freescale Semiconductor, Inc.
- 当前专利权人地址： US TX Austin
- 代理机构： Yudell Isidore Ng Russell PLLC
- 主分类号： H04M9/08
- IPC分类号： H04M9/08
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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