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Subband Approach to Bandlimited Crosstalk Cancellation System in Spatial Sound Reproduction

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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Correspondence to Mingsian R. Bai.

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Bai, M.R., Lee, C. Subband Approach to Bandlimited Crosstalk Cancellation System in Spatial Sound Reproduction. EURASIP J. Adv. Signal Process. 2007, 071948 (2006). https://doi.org/10.1155/2007/71948

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Keywords

  • Information Technology
  • Vital Role
  • Quantum Information
  • Source Localization
  • Subjective Experiment