Open Access

Subband Approach to Bandlimited Crosstalk Cancellation System in Spatial Sound Reproduction

EURASIP Journal on Advances in Signal Processing20062007:071948

https://doi.org/10.1155/2007/71948

Received: 27 December 2005

Accepted: 16 July 2006

Published: 4 October 2006

Abstract

Crosstalk cancellation system (CCS) plays a vital role in spatial sound reproduction using multichannel loudspeakers. However, this technique is still not of full-blown use in practical applications due to heavy computation loading. To reduce the computation loading, a bandlimited CCS is presented in this paper on the basis of subband filtering approach. A pseudoquadrature mirror filter (QMF) bank is employed in the implementation of CCS filters which are bandlimited to 6 kHz, where human's localization is the most sensitive. In addition, a frequency-dependent regularization scheme is adopted in designing the CCS inverse filters. To justify the proposed system, subjective listening experiments were undertaken in an anechoic room. The experiments include two parts: the source localization test and the sound quality test. Analysis of variance (ANOVA) is applied to process the data and assess statistical significance of subjective experiments. The results indicate that the bandlimited CCS performed comparably well as the fullband CCS, whereas the computation loading was reduced by approximately eighty percent.

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Authors’ Affiliations

(1)
Department of Mechanical Engineering, National Chiao-Tung University

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Copyright

© M. R. Bai and C.-C. Lee. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.