
Publica
Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten. Analysis and adjustment of planar microphone arrays for application in directional audio coding
Analyse und Einstellung planarer Mikrofonanordnungen für die Richtungs-Audiocodierung
| Audio Engineering Society -AES-: 124th Audio Engineering Society Convention 2008. Vol.1 : May 17 - 20, 2008, Amsterdam, the Netherlands Red Hook, NY: Curran, 2008 ISBN: 978-1-605-60295-0 S.579-590 |
| Audio Engineering Society (Convention) <124, 2008, Amsterdam> |
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| Englisch |
| Konferenzbeitrag |
| Fraunhofer IIS () |
Abstract
Directional Audio Coding (DirAC) is a well-established and efficient way to capture and reproduce a spatial sound event. In a recording room, DirAC requires four spatially coincident microphones to estimate the desired parameters, i.e., direction-of-arrival and diffuseness of sound: one omnidirectional and three figureof-eight microphones pointing along the axes of a three-dimensional Cartesian coordinate system. In most consumer applications only two dimensional scenes need to be reproduced, implying that only two figure-of-eight microphones are required. Furthermore, instead of directional microphones, arrays of omnidirectional microphones are considered for economic reasons. Therefore, it are investigated various two-dimensional micro phone configurations with respect to their usability for DirAC. Theoretical limits are derived for the correct estimation of both direction-of-arrival and diffuseness for the most suitable planar arrays. Furthermore, a way is suggested to equalize the systematic bias for the direction-of-arrival estimation, introduced by the discrete planar arrays.