Parameter estimation in Directional Audio Coding using linear microphone arrays
Thiergart O, Kratschmer M, Kallinger M, Del Galdo G (2011)
Publication Type: Conference contribution
Publication year: 2011
Book Volume: 2
Pages Range: 1121-1129
Conference Proceedings Title: 130th Audio Engineering Society Convention 2011
Event location: GBR
ISBN: 9781617829253
Abstract
Directional Audio Coding (DirAC) provides an efficient description of spatial sound in terms of few audio down mix signals and parametric side information, namely the Direction Of Arrival (DOA) and the diffuseness of the sound. Traditionally, the parameters are derived based on the active sound intensity vector which is often determined via 2D or 3D microphone grids. Adapting this estimation strategy to linear arrays, which are preferred in various applications due to form factor constraints, yields comparatively poor results. This paper proposes to replace the intensity based DOA estimation in DirAC by a specific estimation of signal parameters via rotational invariance techniques, namely ESPRIT. Moreover, a diffuseness estimator exploiting the correlation between the array sensors is presented. Experimental results show that the DirAC concept can be applied in practice also in conjunction with linear arrays.
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Germany (DE)How to cite
APA:
Thiergart, O., Kratschmer, M., Kallinger, M., & Del Galdo, G. (2011). Parameter estimation in Directional Audio Coding using linear microphone arrays. In 130th Audio Engineering Society Convention 2011 (pp. 1121-1129). GBR.
MLA:
Thiergart, Oliver, et al. "Parameter estimation in Directional Audio Coding using linear microphone arrays." Proceedings of the 130th Audio Engineering Society Convention 2011, GBR 2011. 1121-1129.
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