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A Distortion Reducing Subband Limiter Implementation for Conference Phones

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3 Author(s)
Schuldt, C. ; Dept. of Signal Process., Blekinge Inst. of Technol., Ronneby ; Lindstrom, F. ; Claesson, I.

Distortion, most often caused by the loudspeaker, is a practical problem in acoustic echo cancellation-based conference phones. Typically, this distortion varies significantly with the frequency. This paper presents an implementation of a distortion reducing subband limiter to be used in conjunction with an acoustic echo canceller in a commercial conference phone, yielding improved cancellation performance. Verification of the performance was performed through evaluation of a fix-point real-time implementation.

Published in:

Consumer Electronics, 2008. ICCE 2008. Digest of Technical Papers. International Conference on

Date of Conference:

9-13 Jan. 2008