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All previously published Ambisonic decoders for irregular loudspeaker layouts have localisation performance which varies significantly by angle around the listener. This contrasts with decoders designed for evenly spaced arrangements of loudspeakers where performance characteristics are isotropic. Furthermore even localisation performance around the listener is desirable for a number of application areas of 5.1 surround sound. New decoder design criteria are presented which aim to reduce this variation in localisation performance. These criteria are added to a multiobjective fitness function, based on auditory localisation theory, which guides a heuristic search algorithm to derive decoder parameter sets for the ITU 5.1 layout. The derived decoders exhibit a significant improvement in localisation performance variation by angle around the 360º sound stage.
Author (s): Moore, David; Wakefield, Jonathan
Affiliation:
University of Huddersfield
(See document for exact affiliation information.)
AES Convention: 124
Paper Number:7473
Publication Date:
2008-05-06
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Session subject:
Multichannel Sound
Permalink: https://aes2.org/publications/elibrary-page/?id=14603
(366KB)
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Moore, David; Wakefield, Jonathan; 2008; The Design of Ambisonic Decoders for the ITU 5.1 Layout with Even Performance Characteristics [PDF]; University of Huddersfield; Paper 7473; Available from: https://aes2.org/publications/elibrary-page/?id=14603
Moore, David; Wakefield, Jonathan; The Design of Ambisonic Decoders for the ITU 5.1 Layout with Even Performance Characteristics [PDF]; University of Huddersfield; Paper 7473; 2008 Available: https://aes2.org/publications/elibrary-page/?id=14603