发明名称 |
METHOD AND APPARATUS FOR SETTING A STEP SIZE FOR AN ADAPTIVE FILTER COEFFICIENT OF AN ECHO CANCELLER |
摘要 |
The step sizes for tap positions of an adaptive filter (124) in an echo canceller (125) for canceling an echo signal are individually selected based upon a profile of the echo environment. A training signal (112) is injected into the echo canceller and to the echo path during a training interval, or period. The adaptive filter profiles the echo path during the training interval. Respective step sizes alpha[k] for the tap positions are generated as a function of the echo profile so generated. |
申请公布号 |
US2002090079(A1) |
申请公布日期 |
2002.07.11 |
申请号 |
US19990266280 |
申请日期 |
1999.03.11 |
申请人 |
STEPHENS JAMES ALLEN;PIKET JAMES BRIAN;CHEN ERNEST PEI-CHING;YIP WILLIAM CHUNHUNG |
发明人 |
STEPHENS JAMES ALLEN;PIKET JAMES BRIAN;CHEN ERNEST PEI-CHING;YIP WILLIAM CHUNHUNG |
分类号 |
H04M9/08;(IPC1-7):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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