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Optimization-based reproduction of diffuse audio objects

Franck, Andreas, Fazi, Filippo Maria and Melchior, Frank (2015) Optimization-based reproduction of diffuse audio objects At IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA 2015), United States. 18 - 21 Oct 2015. 14 pp.

Record type: Conference or Workshop Item (Paper)


The creation of a diffuse sound event from a single audio signal is an important signal processing task, for instance in spatial audio reproduction or audio coding. Current algorithms based on decorrelation filters or frequency-dependent panning typically cause artifacts due to transients or time-domain aliasing. In this paper, we propose an optimization-based approach to diffusion that creates a set of filters to approximate a desired distribution of frequency-dependent propagation directions to create the perception of a diffuse sound field with a multi-channel audio system. Thus, the diffusion can be optimally adapted to a specific reproduction scenario. In addition, the transient response can be purposefully improved by imposing constraints on the time-domain filter coefficients.

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Submitted date: 21 April 2015
Accepted/In Press date: 26 June 2015
Published date: 18 October 2015
Additional Information: The authors confirm that all code and data underlying the findings are fully available without restriction. Details of the data and how to request access are available through the DOI 10.15126/surreydata.00808086
Venue - Dates: IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA 2015), United States, 2015-10-18 - 2015-10-21
Keywords: Diffuseness, Decorrelation, Spatial Audio, Convex Optimization, Filter Design
Organisations: Acoustics Group


Local EPrints ID: 384417
PURE UUID: 4600bd05-6bce-4cae-8d95-2abfb526a5a3
ORCID for Andreas Franck: ORCID iD

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Date deposited: 13 Jan 2016 13:52
Last modified: 17 Jul 2017 20:04

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Author: Andreas Franck ORCID iD
Author: Frank Melchior

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