Analysis and Design of Head-Tracked Compensation for Bilateral Ambisonics

Or Berebi, Zamir Ben-Hur, David Lou Alon, Boaz Rafaely

Research output: Contribution to journalArticlepeer-review

Abstract

Virtual and augmented reality technologies demand high-quality spatial sound recording and playback through headphones. However, achieving high-quality binaural reproduction requires a complex recording system and a large number of microphones. To address this issue, a recent study proposed Bilateral Ambisonics, which involves capturing the sound-field using two low-order microphone arrays located ear-distance apart. We present an analytical analysis of the limitation of a previously suggested head-tracking compensation solution to Bilateral Ambisonics. An alternative approach is proposed to overcome these limits in which the translation operation is band-limited. A subjective evaluation and a listening test are provided and complement the findings of the analytical analysis. Results indicate that in a static scenario, compensating for small lateral head-rotations up to ±30° with good accuracy is possible for microphone arrays of spherical harmonics (SH) order of 1 and for medium rotations of up to ±60° with SH order of 2. When a dynamic scenario is considered, Bilateral Ambisonics of order 2 were comparable to High-order Ambisonics, and Bilateral Ambisonics of order 1 provided performance comparable to third order Ambisonics with MagLS.

Original languageEnglish
Pages (from-to)959-972
Number of pages14
JournalIEEE/ACM Transactions on Audio Speech and Language Processing
Volume32
DOIs
StatePublished - 1 Jan 2024

Keywords

  • Spatial sound
  • head-tracking

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Computational Mathematics
  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

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