Frequency dependent regularization of a mixed-order Ambisonics encoding system using psychoacoustically motivated metrics

Tobias Weller*, Jörg M. Buchholz, Chris Oreinos

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

2 Citations (Scopus)

Abstract

In mixed-order Ambisonics (MOA) encoding the right choice of the regularization parameter λ is crucial to the reproduction quality of the system. The choice of λ is a trade-off between low microphone noise amplification and high directivity. Commonly used performance metrics are not suited to determine an optimum λ(f)-curve due to their limited psychoacoustical relevance. Therefore, it is proposed here to use two perceptually motivated metrics that consider the reproduced signals at the listener's ear to quantify the reproduction error and the audibility of the total microphone noise. Regularization was then optimized towards previously defined requirements on both of these metrics separately. The results showed that at frequencies below 500Hz both requirements can be met. Above this frequency one or both of the requirements have to be relaxed in order to find a suitable λ(f).

Original languageEnglish
Title of host publication55th AES International Conference 2014
Subtitle of host publicationSpatial Audio
EditorsTapio Lokki
Place of PublicationNew York
PublisherAudio Engineering Society
Pages1-8
Number of pages8
ISBN (Print)9781634397599
Publication statusPublished - Aug 2014
EventAES 55th International Conference: Spatial Audio - Helsinki, Finland
Duration: 27 Aug 201429 Aug 2014

Other

OtherAES 55th International Conference: Spatial Audio
CountryFinland
CityHelsinki
Period27/08/1429/08/14

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