发明名称 |
Optimization of adaptive filter tap settings for subband acoustic echo cancellers in teleconferencing |
摘要 |
A subband acoustic echo canceller for a telecommunications teleconferencing room is equiped with subband adaptive filters and filter taps associated with said subbands. A data store is provided containing a weight list for controlling allocation of the filter taps among the subbands. An optimum tap profile as determined by the weights is a composite of room acoustic impulse response and weighting adjustments based on one or more measures of perceived human acoustic sensitivity experienced by far-end users. An active periodic adjustment of the weights responsive to detection of sibilant energy in the incoming path further improves echo cancellation. Active measurement and updating of the room acoustic impulse response provides further refinement. <IMAGE> |
申请公布号 |
EP0719028(A3) |
申请公布日期 |
1999.04.28 |
申请号 |
EP19950308832 |
申请日期 |
1995.12.06 |
申请人 |
AT&T CORP. |
发明人 |
DIETHORN, ERIC JOHN |
分类号 |
H03H21/00;H03H17/02;H04B3/23;H04M3/56;H04M9/08 |
主分类号 |
H03H21/00 |
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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