Higher-order processing of spatial impulse responses

Leo McCormack, Archontis Politis, Oliver Scheuregger, Ville Pulkki

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientific

82 Lataukset (Pure)


This article pertains to parametric rendering of microphone array impulse responses, such that the spatial characteristics of a captured space may be imposed onto a monophonic input signal and reproduced over an array
of loudspeakers. Parametric methods operate by analysing a set of spatial parameters, dividing the response into components based on an assumed sound-field model, and rendering the components to the loudspeaker
array using techniques informed by the analysis. For a direct/diffuse model, the sound is divided into nondiffuse and diffuse components, which are reproduced using directional and surrounding reproduction methods,
respectively. In many cases, the input is first divided into frequency bands for the analysis and reproduction. In this article, a method capable of accommodating higher-order spherical harmonic input is proposed, which, based upon initial testing, appears to overcome some of the limitations exhibited by existing methods. The proposed approach operates by partitioning the sound-field into multiple directionally biased sectors, which are then analysed independently. The non-diffuse components are reproduced individually for each sector using amplitude-panning, whereas the diffuse components are encoded back into the spherical harmonic domain, and subsequently reproduced via linear decoding, followed by decorrelation. An open-source implementation of the proposed method is also described.
OtsikkoProceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019 : 9-13 September 2019 in Aachen, Germany
KustantajaDeutsche Gesellschaft für Akustik
ISBN (elektroninen)978-3-939296-15-7
DOI - pysyväislinkit
TilaJulkaistu - syysk. 2019
OKM-julkaisutyyppiB3 Vertaisarvioimaton artikkeli konferenssijulkaisussa
TapahtumaInternational Congress on Acoustics - Aachen, Saksa
Kesto: 9 syysk. 201913 syysk. 2019
Konferenssinumero: 23


ConferenceInternational Congress on Acoustics


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