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A Distance-Based Howling Canceller with Adaptive Bandwidth
Akira SOGAMI,Arata KAWAMURA,Youji IIGUNI 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
We have been researched a distance-based howling canceller. We however have a problem about quality degradation of the howling canceller output. In this paper, to solve this problem, we propose an adaptive bandwidili of the notch filter. The adaptive bandwidth narrows when the distance becomes long. We evaluate the speech quality of the howling canceller output with the adaptive bandwidth. We also evaluate its capability of the howling cancellation with the adaptive bandwidth in a practical environment.