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Convention Paper

Efficient Block Frequency Domain Filtered-x Applied to Phantom Sound Source Generation

Authors: Aarts, Ronald M.; Mathijssen, Alexander W. M.; Sommen, Piet C. W.; Garas, John

AES Convention 104 · Paper 4650 · May 1998

Abstract

A phantom sound source is a virtual sound image which can be utilized in many applications such as stereo base widening, multimedia, and virtual reality engines. Generation of such a virtual sound image using adaptive filters that employ the filtered-x NLMS algorithm is discussed. Such filters are long and complex for the virtual source to cover the whole audio frequency range. Due to this complexity, real-time implementation on a sample-by-sample basis is not practical and block processing techniques, such as block frequency domain adaptive filters, have to be used. Several versions of the filtered-x algorithm in the frequency domain are derived and the different implementations are compared in terms of convergence, behavior and acoustical performance.

Details

Published in
AES Convention 104
AES Convention
104
Paper number
4650
Publication date
May 6, 1998
Session subject
Signal Processing
Affiliation
Philips Research Laboratories, Eindhoven, The Netherlands ; Eindhoven University of Technology, Eindhoven, The Netherlands (See document for exact affiliation information.)
Type
Convention Paper