Estimation of Direct-to-Reverberation Energy Ratio Based On Isotropic and Homogeneous Propagation Model

Konferenz: IWAENC 2012 - International Workshop on Acoustic Signal Enhancement
04.09.2012-06.09.2012 in Aachen, Germany

Tagungsband: IWAENC 2012

Seiten: 4Sprache: EnglischTyp: PDF

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Hioka, Yusuke; Furuya, Ken’ichi; Niwa, Kenta; Haneda, Yoichi (NTT Cyber Space Laboratories, NTT Corporation, 3-9-11 Modori-cho, Musashino, Tokyo, 180-8522 Japan)

We propose a method for estimating the direct-to-reverberation energy ratio (DRR). With this method, diffuse sound field is assumed for reverberation, i.e., reverberation is modelled to propagate into a microphone isotropically with a homogeneous power spectrum density (PSD).With this model, the proposed method estimates the PSD of both direct sound and reverberation by exploiting the directivity shape of a beamformer. Simulation under an ideally diffuse field proved that the proposed method can accurately estimate the DRR from -20 to 20 dB. Index Terms — diffuse, isotropic propagation, homogeneous power spectrum density, beamformer