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Audio Signal Decorrelation Based on Reciprocal-Maximal Length Sequence Filters and Its Applications to Spatial Sound

An algorithm of audio signal decorrelation is proposed. The algorithm is based on a pair of all-pass filters whose responses match with a pair of reciprocal maximal length sequences (MLSs). Taking advantage of the characters of uniform power spectrum and low-valued cross-correlation of reciprocal MLSs, the filters create a pair of output signals with low cross-correlation but almost identical magnitude spectra to the input signal. The proposed algorithm is applied to broadening the auditory source-width and enhancing subjective envelopment in multichannel sound reproduction. Preliminary psychoacoustic experiments validate the performance of the proposed algorithm.

Authors: Xie, Bo-sun; Shi, Bei; Xiang, Ning
Affiliations: South China University of Technology, Guangzhou, China; Rensselaer Polytechnic Institute, Troy, NY, USA(See document for exact affiliation information.)
AES Convention:133 (October 2012) Paper Number:8805 Import into BibTeX
Subject:Spatial Audio Processing

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