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Proceedings Paper

Howling canceling for high gain speakerphone systems exploiting the loudspeaker redundancy
Author(s): Jingjing Zhang; Qinye Yin; Pengcheng Mu; Tianheng Song; Wei Wang; Junchao Wu
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Paper 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.

Paper Details

Date Published: 1 October 2011
PDF: 9 pages
Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82856I (1 October 2011); doi: 10.1117/12.913480
Show Author Affiliations
Jingjing Zhang, Xi'an Jiaotong Univ. (China)
Qinye Yin, Xi'an Jiaotong Univ. (China)
Pengcheng Mu, Xi'an Jiaotong Univ. (China)
Tianheng Song, Xi'an Jiaotong Univ. (China)
Wei Wang, Xi'an Jiaotong Univ. (China)
Junchao Wu, Xi'an Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 8285:
International Conference on Graphic and Image Processing (ICGIP 2011)
Yi Xie; Yanjun Zheng, Editor(s)

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