Optimal mixing matrices and usage of decorrelators in spatial audio processing

Juha Vilkamo*, Tom Bäckström, Achim Kuntz

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

2 Citations (Scopus)

Abstract

In perceptual processing of spatial audio, a typical assumption is that the spatial aspect of a loudspeaker- reproduced sound is determined especially by the energies and the time-aligned dependencies of the audio channels, which are expressed by the real part of the signal covariance matrix, in perceptual frequency bands. In this paper, we propose a generally applicable method to robustly process spatial sound in this domain. This includes an adaptive mixing solution to reach the given target covariance matrix by best usage of the independent components in the input channels, and means to inject the necessary amount of decorrelated sound energy when the target is not achieved otherwise. The method was implemented as a part of a perceptually motivated spatial microphone technique, and numerous further use cases have been identified. Copyright

Original languageEnglish
Title of host publication45th Audio Engineering Society International Conference 2012 - Applications of Time-Frequency Processing in Audio
PublisherAudio Engineering Society
Pages266-273
Number of pages8
ISBN (Print)9781622760077
Publication statusPublished - 1 Dec 2012
MoE publication typeA4 Article in a conference publication
EventAudio Engineering Society International Conference on Applications of Time-Frequency Processing in Audio - Helsinki, Finland
Duration: 1 Mar 20124 Mar 2012
Conference number: 45

Conference

ConferenceAudio Engineering Society International Conference on Applications of Time-Frequency Processing in Audio
CountryFinland
CityHelsinki
Period01/03/201204/03/2012

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