Fast algorithms for blind estimation of reverberation time

Author

Ratnam, Rama ; Jones, Douglas L. ; Brien, William D O, Jr.

Author_Institution

Beckman Inst. for Adv. Sci. & Technol., Univ. of Illinois, Urbana, IL, USA

Volume

11

Issue

6

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

537

Lastpage

540

Abstract

The reverberation time (RT) measures the persistence of a sound in enclosed acoustic spaces. In a previous work, a method for the blind maximum-likelihood estimation (MLE) of RT using passively received microphone signals was presented. The procedure overcomes the drawbacks of current methods that use a controlled sound source for RT determination. Here, fast algorithms for online implementation of the method are developed. One algorithm, suitable for a one-time determination of the RT, requires O(N) computations for a data frame of length N. A second IIR algorithm, based on Q-levels of quantization, requires O(Q) computations. Results for speech data and choice of algorithms are discussed.

Keywords

acoustic generators; acoustic radiators; maximum likelihood estimation; microphones; quantisation (signal); reverberation; speech; IIR algorithm; MLE; blind estimation; blind maximum-likelihood estimation; microphone signal; online implementation; quantization; reverberation time; sound persistence; Acoustic measurements; Array signal processing; Geometry; Maximum likelihood estimation; Microphones; Reverberation; Signal processing algorithms; Space technology; Speech coding; Switches; Acoustic reverberation time; blind estimation; fast algorithms;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2004.826667

Filename

1300603