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Optimization-based reproduction of diffuse audio objects

Optimization-based reproduction of diffuse audio objects
Optimization-based reproduction of diffuse audio objects
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.
Diffuseness, Decorrelation, Spatial Audio, Convex Optimization, Filter Design
Franck, Andreas
fa179b73-6a83-4c42-b300-81f1dfe9ef6d
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Melchior, Frank
e9de06c1-5123-4100-b8ae-87290b6dcff0
Franck, Andreas
fa179b73-6a83-4c42-b300-81f1dfe9ef6d
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Melchior, Frank
e9de06c1-5123-4100-b8ae-87290b6dcff0

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

Record type: Conference or Workshop Item (Paper)

Abstract

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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waspaa15_decorr_filters_preprint.pdf - Accepted Manuscript
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More information

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), New York, United States, 2015-10-18 - 2015-10-21
Keywords: Diffuseness, Decorrelation, Spatial Audio, Convex Optimization, Filter Design
Organisations: Acoustics Group

Identifiers

Local EPrints ID: 384417
URI: http://eprints.soton.ac.uk/id/eprint/384417
PURE UUID: 4600bd05-6bce-4cae-8d95-2abfb526a5a3
ORCID for Andreas Franck: ORCID iD orcid.org/0000-0002-4707-6710
ORCID for Filippo Maria Fazi: ORCID iD orcid.org/0000-0003-4129-1433

Catalogue record

Date deposited: 13 Jan 2016 13:52
Last modified: 13 Jun 2024 01:46

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Contributors

Author: Andreas Franck ORCID iD
Author: Frank Melchior

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