Rendering of Source Spread for Arbitrary Playback Setups Based on Spatial Covariance Matching

Leo McCormack, Archontis Politis, Ville Pulkki

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

7 Citations (Scopus)

Abstract

This paper proposes an algorithm for rendering spread sound sources, which are mutually incoherent across their extents, over arbitrary playback formats. The approach involves first generating signals corresponding to the centre of the spread source for the intended playback setup, along with decorrelated variants, followed by defining a diffuse spatial covariance matrix for the confined target spreading area. The mixing matrices required to combine these signals, in a manner whereby the resulting output signals exhibit the target inter-channel relationships for an incoherently spread source, are computed based on an optimised solution which is constrained to preserve signal fidelity. The proposed solution is evaluated in the context of producing extended sound sources for binaural playback. Objective perceptual metrics are computed and shown to be comparable to those derived from an ideal incoherently spread reference. Signal distortion measures are also calculated for speech, musical, and ambience recordings, which indicate higher signal fidelity produced by the proposed constrained spatial covariance matching solution, compared to an unconstrained alternative. These improvements in signal fidelity are further demonstrated by the provided audio examples and open-source audio plug-in.
Original languageEnglish
Title of host publication2021 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)
PublisherIEEE
Pages371-375
Number of pages5
ISBN (Electronic)978-1-6654-4870-3
DOIs
Publication statusPublished - 2021
Publication typeA4 Article in conference proceedings
EventIEEE Workshop on Applications of Signal Processing to Audio and Acoustics - , United States
Duration: 17 Oct 202120 Oct 2021

Publication series

NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
ISSN (Print)1931-1168
ISSN (Electronic)1947-1629

Conference

ConferenceIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
Country/TerritoryUnited States
Period17/10/2120/10/21

Keywords

  • Acoustic distortion
  • Conferences
  • Signal processing algorithms
  • Music
  • Coherence
  • Rendering (computer graphics)
  • Decorrelation
  • sound source spreading
  • spatial audio

Publication forum classification

  • Publication forum level 1

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