发明名称 |
A METHOD FOR ENHANCING THE ACOUSTIC ECHO CANCELLATION SYSTEM USING RESIDUAL ECHO FILTER |
摘要 |
This invention discloses an improvement to a digital Acoustic Echo Control (AEC) in hands-free telephones. It describes an additional adaptive filter referred to as a residual echo filter, which is placed after the usual echo canceller and it is used to efficiently and accurately estimate a residual echo signal b(i) and a system coupling factor ß(i), which can be utilized to establish an efficient control for the AEC system and construct the appropriate filters. The invention also describes a control block means performing a joint operation control of the echo canceller, residual echo suppressor and residual echo filter for achieving more consistent echo cancellation results and enhancing output signal quality. |
申请公布号 |
WO2005002184(A3) |
申请公布日期 |
2005.05.12 |
申请号 |
WO2004IB02114 |
申请日期 |
2004.06.24 |
申请人 |
NOKIA CORPORATION;NOKIA INC.;MYLLYLAE, VILLE;ENZNER, GERALD |
发明人 |
MYLLYLAE, VILLE;ENZNER, GERALD |
分类号 |
H04B1/10;H04M;H04M1/00;H04M1/58;H04M9/00;H04M9/08 |
主分类号 |
H04B1/10 |
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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