Comparison of Nonparametric Interpolation Techniques for Sparsely Measured Binaural Room Impulse Responses

Bau D, Himmelein H, Pörschmann C. Comparison of Nonparametric Interpolation Techniques for Sparsely Measured Binaural Room Impulse Responses. J Audio Eng Soc. 2024;72(7/8):479-492. doi:10.17743/jaes.2022.0150

@article{Bau2024_22645,
  author = {Bau, David and Himmelein, Hendrik and Pörschmann, Christoph},
  title = {{Comparison of Nonparametric Interpolation Techniques for Sparsely Measured Binaural Room Impulse Responses}},
  journal = {Journal of the Audio Engineering Society},
  volume = {72},
  number = {7/8},
  pages = {479--492},
  year = {2024},
  month = jul,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2022.0150},
  url = {https://doi.org/10.17743/jaes.2022.0150}
}

TY  - JOUR
TI  - Comparison of Nonparametric Interpolation Techniques for Sparsely Measured Binaural Room Impulse Responses
AU  - Bau, David
AU  - Himmelein, Hendrik
AU  - Pörschmann, Christoph
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 72
IS  - 7/8
SP  - 479
EP  - 492
PY  - 2024
DA  - 2024/07/09
DO  - 10.17743/jaes.2022.0150
UR  - https://doi.org/10.17743/jaes.2022.0150
PB  - Audio Engineering Society
LA  - en
AB  - This study investigates different interpolation techniques for spatially upsampling Binaural Room Impulse Responses (BRIRs) measured on a sparse grid of view orientations. In this context, the authors recently presented the Spherical Array Interpolation by Time Alignment (SARITA) method for interpolating spherical microphone array signals with a limited number of microphones, which is adapted for the spatial upsampling of sparse BRIR datasets in the present work. SARITA is compared with two existing nonparametric BRIR-interpolation methods and naive linear interpolation. The study provides a technical and perceptual analysis of the interpolation performance. The results show the suitability of all interpolation methods apart from linear interpolation to achieving a realistic auralization, even for very sparse BRIR sets. For angular resolutions of 30◦ and real-world stimuli, most participants could not distinguish SARITA from an artifact-free reference.
ER  -