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Digital Adaptive Echo-Canceller for Room Acoustics ImprovementTOPA, M. D. , MURESAN, I. , KIREI, B. S. , HOMANA, I.
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adaptive system identification, echo-canceller, reverberation, room acoustics, sub-band filtering
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About this article
Date of Publication: 2010-02-27
Volume 10, Issue 1, Year 2010, On page(s): 50 - 53
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2010.01008
Web of Science Accession Number: 000275458900008
SCOPUS ID: 77954686033
This paper presents a method to cancel the echoes generated by reflections in a room. The starting point is the full-band adaptive system identification method, where the unknown system is the room, providing several reflections of the sound. A sub-band filtering method is proposed and all the aspects regarding the filter banks, the structure, the number of sub-bands and the order of the required filters are analyzed. The performance is studied with respect to the provided error and the echo return loss enhancement. The asymmetric structure sub-band filtering offers a better performance than the full-band implementation. Increasing the number of sub-bands will also enhance the performance of the system.
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| M. Kahrs, K. Brandenburg, "Applications of Digital Signal Processing to Audio and Acoustics", Kluwer Academic Publishers, 1998 [PermaLink]
 Maurice Bellanger, "Adaptive Digital Filters", Second Edition Revised and Expanded, Marcel Deker Inc., 2001 [PermaLink]
 Damian E. Marelli, "Subband Approach to System Identification", Ph.D. Thesis, University of Newcastle, Australia, 2003
 Koen Eneman, Marc Moonen, "A Relation Between Subband and Frequency Domain Adapting Filtering", Proceedings of the 13th International Conference on Digital Signal Processing (DSP97), Santorini, Greece
 Norbert Toma, Marina Topa, Irina Muresan, Botond Kirei, Marius Neag, Albert Fazakas, "Acoustic Modelling and Optimization of a Room", Acta Technica Napocensis - Electronics and Telecommunications, Volume 50, Number 2/2009, pp. 25-30
 T. van Waterschoot, M. Moonen, "50 Years of Acoustic Feedback Control: State of the Art and Future Challenges", Internal Report 08-13, K.U. Leuven, 2008
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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