发明名称 |
INTERFERENCE CANCELING METHOD AND APPARATUS |
摘要 |
Interference canceling is provided for canceling, from a target signal generated from a target source, an interference signal generated by an interference source. The beam splitter (114) beam-splits the target signal into a plurality of band-limited target signals band-limited frequency bands and beam-splits the interference signal into corresponding band-limited frequency bands. The adaptive filter (500) adaptively filters each band-limited interference signal from each corresponding band-limited target signal. The beam selector (112) selects beams simultaneously to improve accuracy and, in particular, selects a beam having a fixed direction and a beam which rotates in direction. The noise gate (120) gates the main signal adaptatively filtered by the adaptive filter by opening the noise gate (120) when a signal-to-noise ratio at the near-end is above a predetermined threshold and closing the noise gate when the signal-to-noise ratio at the near-end is below the predetermined threshold. When the target signal represents speech generated at a near end of a teleconference, the adaptive filter (500) cancels an echo present in the reference signal broadcast to a far end of the teleconference.
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申请公布号 |
WO0018099(A1) |
申请公布日期 |
2000.03.30 |
申请号 |
WO1999US21186 |
申请日期 |
1999.09.14 |
申请人 |
LAMAR SIGNAL PROCESSING, LTD.;ANDREA ELECTRONICS CORPORATION;MARASH, JOSEPH;BERDUGO, BARUCH |
发明人 |
MARASH, JOSEPH;BERDUGO, BARUCH |
分类号 |
H04R3/02;H04B3/20;H04M1/60;H04R3/00;(IPC1-7):H04M9/08 |
主分类号 |
H04R3/02 |
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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