IMAGLS: INTERAURAL LEVEL DIFFERENCE WITH MAGNITUDE LEAST-SQUARES LOSS FOR OPTIMIZED FIRST-ORDER HEAD-RELATED TRANSFER FUNCTION

O. Berebi, Z. Ben-Hur, D. Lou Alon, B. Rafaely

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

Abstract

Binaural reproduction for headphone-based listening is an active research area due to its widespread use in evolving technologies such as augmented and virtual reality (AR and VR). On the one hand, these applications demand high quality spatial audio perception to preserve the sense of immersion. On the other hand, recording devices may only have a few microphones, leading to low-order representations such as first-order Ambisonics (FOA). However, first-order Ambisonics leads to limited externalization and spatial resolution. In this paper, a novel head-related transfer function (HRTF) preprocessing optimization loss is proposed, and is minimized using nonlinear programming. The new method, denoted iMagLS, involves the introduction of an interaural level difference (ILD) error term to the now widely used MagLS optimization loss for the lateral plane angles. Results indicate that the ILD error could be substantially reduced, while the HRTF magnitude error remains similar to that obtained with MagLS. These results could prove beneficial to the overall spatial quality of first-order Ambisonics, while other reproduction methods could also benefit from considering this modified loss.

Original languageEnglish
Title of host publicationForum Acusticum 2023 - 10th Convention of the European Acoustics Association, EAA 2023
PublisherEuropean Acoustics Association, EAA
ISBN (Electronic)9788888942674
StatePublished - 1 Jan 2023
Event10th Convention of the European Acoustics Association, EAA 2023 - Torino, Italy
Duration: 11 Sep 202315 Sep 2023

Publication series

NameProceedings of Forum Acusticum
ISSN (Print)2221-3767

Conference

Conference10th Convention of the European Acoustics Association, EAA 2023
Country/TerritoryItaly
CityTorino
Period11/09/2315/09/23

Keywords

  • ambisonics
  • binaural reproduction
  • ILD
  • MagLS
  • perceptually motivated loss

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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