Frequency-Dependent Directional Feedback Delay Network

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A4 Artikkeli konferenssijulkaisussa
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Date

2020-05-04

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Department of Signal Processing and Acoustics

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Language

en

Pages

176-180

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2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Abstract

A recent publication introduced the Directional Feedback Delay Network, a parametric artificial reverberation algorithm capable of producing direction-dependent energy decay. This method extends the capabilities of Feedback Delay Networks by using multichannel delay-line groups and a spatial transform to produce direction-dependent reverberation in the Ambisonics domain. In this paper, we present a modified formulation of the Directional Feedback Delay Network method that allows both frequency-and direction-dependent reverberation. Multichannel delay-line groups are used to manipulate signals incident on a spherical grid through independent recursive signal paths, while an early reflection module gives a physically-motivated spatial distribution of input signals in the system. The overall number of delay lines is reduced from the previous formulation, and the design allows flexibility to favor a lower computational cost over accuracy.

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Keywords

Artificial reverberation, multichannel sound reproduction, Spatial audio

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DOI

10.1109/ICASSP40776.2020.9054717

Citation

Alary, B & Politis, A 2020, Frequency-Dependent Directional Feedback Delay Network . in 2020 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2020 - Proceedings ., 9054717, Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, pp. 176-180, IEEE International Conference on Acoustics, Speech, and Signal Processing, Barcelona, Spain, 04/05/2020 . https://doi.org/10.1109/ICASSP40776.2020.9054717

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https://urn.fi/URN:NBN:fi:aalto-202006254189

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[article-cris] Sähkötekniikan korkeakoulu / ELEC