发明授权
US07711108B2 Fast echo canceller reconvergence after TDM slips and echo level changes
有权
TDM回波消除和回波电平变化后的快速回波消除器重新收敛
- 专利标题: Fast echo canceller reconvergence after TDM slips and echo level changes
- 专利标题(中): TDM回波消除和回波电平变化后的快速回波消除器重新收敛
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申请号: US11072476申请日: 2005-03-03
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公开(公告)号: US07711108B2公开(公告)日: 2010-05-04
- 发明人: Huan-Yu Su , Adil Benyassine , Nick J. Lavrov
- 申请人: Huan-Yu Su , Adil Benyassine , Nick J. Lavrov
- 申请人地址: US CA Newport Beach
- 专利权人: Mindspeed Technologies, Inc.
- 当前专利权人: Mindspeed Technologies, Inc.
- 当前专利权人地址: US CA Newport Beach
- 代理机构: Farjami & Farjami LLP
- 主分类号: H04M9/08
- IPC分类号: H04M9/08
摘要:
A method of adjusting an echo canceller comprises obtaining a first cross-correlation between a far-end signal and an error signal, wherein the error signal is generated by subtracting an output signal of an adaptive filter from a local-end signal; determining whether the first cross-correlation is above a pre-determined threshold; relocating the adaptive filter by a few samples if the determining determines that the first cross-correlation is above a pre-determined threshold; calculating a first improvement indicator parameter, wherein the first improvement indicator parameter is calculated after the relocating the adaptive filter by the few samples; determining whether the first improvement indicator parameter indicates a performance improvement by the adaptive filter after the relocating the adaptive filter by the few samples; calculating a gain based on the local-end signal and the error signal if the determining does not determine the performance improvement; and multiplying the adaptive filter by the gain.