Frequency-Dependent Directional Feedback Delay Network

Benoit Alary, Archontis Politis

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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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.
Original languageEnglish
Title of host publication2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
PublisherIEEE
Pages176-180
ISBN (Electronic)978-1-5090-6631-5
ISBN (Print)978-1-5090-6632-2
DOIs
Publication statusPublished - 4 May 2020
MoE publication typeA4 Article in a conference publication
EventIEEE International Conference on Acoustics, Speech and Signal Processing - Barcelona, Spain
Duration: 4 May 20208 May 2020
Conference number: 45

Publication series

NameProceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing
ISSN (Print)1520-6149
ISSN (Electronic)2379-190X

Conference

ConferenceIEEE International Conference on Acoustics, Speech and Signal Processing
Abbreviated titleICASSP
CountrySpain
CityBarcelona
Period04/05/202008/05/2020

Keywords

  • Artificial reverberation
  • multichannel sound reproduction
  • Spatial audio

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  • Projects

    ICHO: Immersive Concert for Homes

    Alary, B. & Välimäki, V.

    01/09/201630/09/2020

    Project: Academy of Finland: Other research funding

    Cite this

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