1 October 2011 Howling canceling for high gain speakerphone systems exploiting the loudspeaker redundancy
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Proceedings Volume 8285, International Conference on Graphic and Image Processing (ICGIP 2011); 82856I (2011) https://doi.org/10.1117/12.913480
Event: 2011 International Conference on Graphic and Image Processing, 2011, Cairo, Egypt
Abstract
Howling of an audio amplifying system is annoying, which may occur when a closed-loop is formed for amplified signals. In this paper, we exploit the space diversity offered by the loudspeaker redundancy and develop a new howling canceling approach for high gain speakerphone systems. The amplified waves are weighted at the two loudspeakers to achieve self-cancellation at the microphone after the propagation. As a result, the echo waves can be completely eliminated at the microphone, which avoids any feedback that yields the howling. Results of simulation and hardware test show effectiveness of the method.
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Jingjing Zhang, Jingjing Zhang, Qinye Yin, Qinye Yin, Pengcheng Mu, Pengcheng Mu, Tianheng Song, Tianheng Song, Wei Wang, Wei Wang, Junchao Wu, Junchao Wu, } "Howling canceling for high gain speakerphone systems exploiting the loudspeaker redundancy", Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82856I (1 October 2011); doi: 10.1117/12.913480; https://doi.org/10.1117/12.913480
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