DocumentCode :
2581575
Title :
Effects of room reverberation on time-delay estimation performance
Author :
Bédard, Stéphane ; Champagne, Benoit ; Stéphenne, Alex
Author_Institution :
INRS-Telecommun., Quebec Univ., Verdun, Que., Canada
fYear :
1994
fDate :
19-22 Apr 1994
Abstract :
Previously, time-delay estimation (TDE) between two or more microphones has been proposed as a means for the passive localization of a talker in an audio-conference room. The authors present a simulation study of the effects of room reverberation on the performance of the maximum likelihood (ML) estimator of the time delay, which is obtained by maximizing the output of a generalized cross-correlator. To this end, synthetic microphone signals are generated with the image model technique and are used to evaluate the bias, variance and probability of anomaly of the ML estimator as a function of the room reflection coefficients and other external parameters of interest. The results clearly demonstrate the adverse effects of room reverberation on MLTDE performance. Qualitative and quantitative explanations of these effects are provided
Keywords :
acoustic signal processing; acoustic wave reflection; architectural acoustics; delays; direction-of-arrival estimation; maximum likelihood estimation; reverberation; speech processing; MLTDE performance; audio-conference room; bias; generalized cross-correlator; image model technique; maximum likelihood estimator; passive localization; probability of anomaly; room reflection coefficients; room reverberation; synthetic microphone signals; talker; time-delay estimation performance; variance; Acoustic reflection; Business; Delay effects; Delay estimation; Image generation; Maximum likelihood estimation; Microphone arrays; Reverberation; Signal generators; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
ISSN :
1520-6149
Print_ISBN :
0-7803-1775-0
Type :
conf
DOI :
10.1109/ICASSP.1994.389670
Filename :
389670
Link To Document :
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