Regularized Spherical Fourier Transform for Room Impulse Response Interpolation

Julio Alarcon, Javier Solis-Lastra, Cesar D. Salvador

Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

Room impulse responses (RIRs) are a key tool in architectural acoustics and spatial sound for virtual reality. They characterize the room response between a sound source and a receiver. Directional RIRs at the receiver position can be measured with spherical microphone arrays or calculated with 3D models and numerical methods. Either because of a low number of microphones or limited computational capacity, there is a need to interpolate the RIRs to obtain higher directional resolutions. The spherical Fourier transform (SFT) enables a promising physics-based interpolation approach. However, existing SFT algorithms for acoustic purposes highly depend on the spherical distribution of microphones. This paper presents a SFT algorithm based on Tikhonov regularization that is suitable for random spherical distributions. Results show that the regularized SFT maintains the interpolation error bounded at high-energy values in time and up to a maximum frequency determined by the number of microphones. An open-source implementation is made publicly available to foster the reproducibility of this research.

Idioma originalInglés
Título de la publicación alojadaProceedings of the 2021 IEEE 28th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2021
EditorialInstitute of Electrical and Electronics Engineers Inc.
ISBN (versión digital)9781665412216
DOI
EstadoPublicada - 5 ago. 2021
Publicado de forma externa
Evento28th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2021 - Virtual, Lima, Perú
Duración: 5 ago. 20217 ago. 2021

Serie de la publicación

NombreProceedings of the 2021 IEEE 28th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2021

Conferencia

Conferencia28th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2021
País/TerritorioPerú
CiudadVirtual, Lima
Período5/08/217/08/21

Nota bibliográfica

Publisher Copyright:
© 2021 IEEE.

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