发明授权
- 专利标题: Method and system for a dual echo canceller
- 专利标题(中): 双回波消除器的方法和系统
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申请号: US12474065申请日: 2009-05-28
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公开(公告)号: US08687797B2公开(公告)日: 2014-04-01
- 发明人: Hanks Zeng , Prakash Khanduri , Ken Kasiske , Ronish Patel , Nelson Sollenberger
- 申请人: Hanks Zeng , Prakash Khanduri , Ken Kasiske , Ronish Patel , Nelson Sollenberger
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- 主分类号: H04M9/08
- IPC分类号: H04M9/08
摘要:
Methods and systems for a dual echo canceller (EC) are disclosed and may include cancelling echo in utilizing a dual echo canceller, wherein said dual echo canceller includes an active echo canceller and an adaptive echo canceller. Filter coefficients may be copied from the adaptive echo canceller to the active echo canceller for the cancellation, based on whether said adaptive echo canceller has converged. The coefficients may be copied utilizing copy logic, which may comprise divergence detection and/or echo path change detection. The coefficients may be reset to default settings utilizing the copy logic. The coefficients may be calculated utilizing normalized block least mean squares (NBLMS), and may be calculated when the NBLMS is enabled by update logic. The coefficients may be calculated utilizing linear predictive coefficient (LPC) filtered uplink and downlink signals.
公开/授权文献
- US20100303228A1 METHOD AND SYSTEM FOR A DUAL ECHO CANCELLER 公开/授权日:2010-12-02
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