Invention Grant
- Patent Title: Method and system for a dual echo canceller
- Patent Title (中): 双回波消除器的方法和系统
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Application No.: US12474065Application Date: 2009-05-28
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Publication No.: US08687797B2Publication Date: 2014-04-01
- Inventor: Hanks Zeng , Prakash Khanduri , Ken Kasiske , Ronish Patel , Nelson Sollenberger
- Applicant: Hanks Zeng , Prakash Khanduri , Ken Kasiske , Ronish Patel , Nelson Sollenberger
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H04M9/08
- IPC: H04M9/08

Abstract:
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.
Public/Granted literature
- US20100303228A1 METHOD AND SYSTEM FOR A DUAL ECHO CANCELLER Public/Granted day:2010-12-02
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