| 摘要 |
<p>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.</p> |
