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Conference papers

Reduction of 3D Ambisonic to 2D using plane-wave decomposition

Thibaut Carpentier 1 
1 EAC - Espaces acoustiques et cognitifs
STMS - Sciences et Technologies de la Musique et du Son
Abstract : This articles deals with the reduction – or “projection” or “downscaling” – of a 3D-encoded Ambisonic sound field (“full-sphere” or “periphonic”) into a 2D representation (“horizontal-only” or “planar” or “pantophonic”). We show that the reduction operation can be equivalently achieved by 1) applying conversion formula of the normalization factors, or 2) performing a plane-wave decomposition of the original sound field and re-encoding the resulting plane waves to 2D Ambisonic. The latter approach provides greater flexibility in adapting the content to horizontal-only reproduction.
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Submitted on : Tuesday, May 17, 2022 - 8:39:19 PM
Last modification on : Wednesday, May 18, 2022 - 3:40:34 AM


  • HAL Id : hal-03670900, version 1


Thibaut Carpentier. Reduction of 3D Ambisonic to 2D using plane-wave decomposition. 152nd Convention of the Audio Engineering Society, May 2022, La Haye, Netherlands. ⟨hal-03670900⟩



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