Signal-Based Performance Evaluation of Dereverberation Algorithms. (1st December 2009)

• Record Type: Journal Article
• Authors: Naylor, Patrick A.; Gaubitch, Nikolay D.; Habets, Emanuël A. P.
• Other Names: Valimaki Vesa Academic Editor.
• Is Part Of: Journal of electrical and computer engineering. Volume 2010(2010)
• Publication Date: 2009-12-01
• Subjects: Computer engineering -- Periodicals; Electrical engineering -- Periodicals; 621.3905
• DOI: 10.1155/2010/127513
• Languages: English
• ISSNs: 2090-0147

Abstract

Abstract : We address the measurement of reverberation in terms of the (DRR) in the context of the assessment of dereverberation algorithms for which we wish to quantify the level of reverberation before and after processing. The DRR is normally calculated from the impulse response of the reverberating system. However, several important dereverberation algorithms involve nonlinear and/or time-varying processing and therefore their effect cannot conveniently be represented in terms of modifications to the impulse response of the reverberating system. In such cases, we show that a good estimate of DRR can be obtained from the input/output signals alone using the Signal-to-Reverberant Ratio (SRR) only if the source signal is spectrally white and correctly normalized. We study alternative normalization schemes and conclude by showing a least squares optimal normalization procedure for estimating DRR using signal-based SRR measurement. Simulation results illustrate the accuracy of DRR estimation using SRR.