Article

End-to-End Magnitude Least Squares Binaural Rendering for Equatorial Microphone Arrays (en)

* Presenting author
Day / Time: 08.03.2023, 15:20-15:40
Room: Saal X11-12
Typ: Regulärer Vortrag
Abstract: We recently presented an end-to-end magnitude least squares (eMagLS) binaural rendering method for spherical microphone array (SMA) signals that integrates a comprehensive array model into a magnitude least squares objective to minimize reproduction errors. The introduced model addresses impairments due to practical limitations of the rendering method in the spherical harmonic (SH) domain, namely, spatial aliasing, truncation of the SH decomposition order as well as regularized radial filtering. In this work, we improve the processing model when applied to the recently proposed equatorial microphone array (EMA). Such arrays provide a similar accuracy to SMAs for sound fields from sources inside the horizontal plane, while requiring a much lower number of microphones. We compare the proposed end-to-end renderers for both array types against a given binaural reference magnitude response. In addition to anechoic array simulations, the evaluation includes measured array room impulse responses at different SH orders. Our results show the effectiveness of the method to minimize magnitude errors at high frequencies, for SMAs and EMAs, in the anechoic case as well as under practical room conditions. The published reference implementation of the method has been refined and now also includes the solution for EMAs.
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