Directional Filtering of Ambisonic Sound Scenes

Lecomte P, Gauthier PA, Berry A, Garcia A, Langrenne C. Directional Filtering of Ambisonic Sound Scenes. In: AES Conference: 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science. Audio Engineering Society; 2018. Paper P7-1. Available from: https://aes.org/publications/elibrary-page/?id=19622

@inproceedings{Lecomte2018_19622,
  author = {Lecomte, Pierre and Gauthier, Philippe-Aubert and Berry, Alain and Garcia, Alexandre and Langrenne, Christophe},
  title = {{Directional Filtering of Ambisonic Sound Scenes}},
  booktitle = {AES Conference: 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science},
  note = {Paper P7-1},
  year = {2018},
  month = jul,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19622}
}

TY  - CPAPER
TI  - Directional Filtering of Ambisonic Sound Scenes
AU  - Lecomte, Pierre
AU  - Gauthier, Philippe-Aubert
AU  - Berry, Alain
AU  - Garcia, Alexandre
AU  - Langrenne, Christophe
T2  - AES Conference: 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science
M1  - Paper P7-1
PY  - 2018
DA  - 2018/07/06
UR  - https://aes.org/publications/elibrary-page/?id=19622
PB  - Audio Engineering Society
LA  - en
AB  - This paper presents an approach for the directional filtering in an Ambisonic sound scene. The filtering is described in the angular domain and is done in the Ambisonic domain thanks to a spherical Fourier transform. When dealing with finite-order Ambisonics, this operation can be expressed as a matrix operation. Two directional filtering cases are discussed: the directional Dirac and the case of beampattern with known spherical Fourier transform. Theoretical analysis is provided: It is shown that the required order after directional filtering should increase to avoid the loss of information. An implementation is introduced: It allows variable selectivity of the directional filtering along with real-time interaction.
ER  -