Source Localization in Reverberant Environments: Part Ii-statistical Analysis Sp-edics: 2-room

The main di culty in building robust practical systems for acoustical source localization using microphone arrays, is the e ects of room-reverberation. In this paper, a statistical analysis is presented of the in uence of room reverberation on source localization techniques. Using a statistical reverberation model presented in a companion paper, the Cram erRao lower bound for time-deley estimation and maximum likelihood estimators are derived. The probability of a large error is investigated, and also the performance of common time-delay estimation techniques is analyzed. An interesting outcome of the analysis is that the so-called PHAT time-delay estimator is shown to be optimal among a class of cross-correlation based time-delay estimators.

[1]  H. Sabine.  Room Acoustics , 1953, The SAGE Encyclopedia of Human Communication Sciences and Disorders.

[2]  Jont B. Allen,et al.  Image method for efficiently simulating small‐room acoustics , 1976 .

[3]  G. Carter,et al.  The generalized correlation method for estimation of time delay , 1976 .

[4]  J. Ianniello,et al.  Time delay estimation via cross-correlation in the presence of large estimation errors , 1982 .

[5]  H. C. Schau,et al.  Passive source localization employing intersecting spherical surfaces from time-of-arrival differences , 1987, IEEE Trans. Acoust. Speech Signal Process..

[6]  J. Ianniello.  High resolution multipath time delay estimation for broadband random signals , 1987, ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing.

[7]  Julius O. Smith,et al.  Closed-form least-squares source location estimation from range-difference measurements , 1987, IEEE Trans. Acoust. Speech Signal Process..

[8]  Petre Stoica,et al.  Performance study of conditional and unconditional direction-of-arrival estimation , 1990, IEEE Trans. Acoust. Speech Signal Process..

[9]  Anthony J. Weiss,et al.  Maximum-Likelihood Direction Finding of Wide-Band Sources , 1993, IEEE Trans. Signal Process..

[10]  Ea-Ee Jan,et al.  Sound source localization in reverberant environments using an outlier elimination algorithm , 1996, Proceeding of Fourth International Conference on Spoken Language Processing. ICSLP '96.

[11]  Maurizio Omologo,et al.  Acoustic source location in noisy and reverberant environment using CSP analysis , 1996, 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings.

[12]  Benoît Champagne,et al.  Performance of time-delay estimation in the presence of room reverberation , 1996, IEEE Trans. Speech Audio Process..

[13]  Maurizio Omologo,et al.  Use of the crosspower-spectrum phase in acoustic event location , 1997, IEEE Trans. Speech Audio Process..

[14]  M. S. Brandstein.  A pitch-based approach to time-delay estimation of reverberant speech , 1997, Proceedings of 1997 Workshop on Applications of Signal Processing to Audio and Acoustics.

[15]  Michael S. Brandstein,et al.  A practical methodology for speech source localization with microphone arrays , 1997, Comput. Speech Lang..

[16]  Steven Kay,et al.  Fundamentals Of Statistical Signal Processing , 2001 .