Robust Time Delay Estimation for Sound Source Localization in Noisy Environments - Applications of Signal Processing to Audio and Acoustics, 1997. 1997 IEEE ASSP Workshop on

Blind Sparse-nonnegative (BSN) Channel Identification for Acousitic Time-Difference-of-Arrival Estimation

Estimating time-difference-of-arrival (TDOA) remains a challenging task when acoustic environments are reverberant and noisy. Blind channel identification approaches for TDOA estimation explicitly model multipath reflections and have been demonstrated to be effective in dealing with reverberation. Unfortunately, existing blind channel identification algorithms are sensitive to ambient noise. Th...

Second Order Volterra Inverses for Compensation of Loudspeaker Nonlinearity - Applications of Signal Processing to Audio and Acoustics, 1995., IEEE ASSP Workshop on

High quality sound reproduction by loudspeakers is increaringly problematic if the dimensions of the loudspeaker decrease. To produce enough power, large diaphragm excursions are needed which give rise to significant distortions especially at very low frequencies. Instead of improving the mechanical construction of the transducer we apply a feedforward nonlinear digital inverse circuit. Results...

A closed-form location estimator for use with room environment microphone arrays

The linear intersection (LI) estimator, a closed-form method for the localization of source positions given sensor array time-delay estimate information, is presented. The LI estimator is shown to be robust and accurate, to closely model the search-based ML estimator, and to outperform a benchmark algorithm. The computational complexity of the LI estimator is suitable for use in real-time micro...

Efficient estimation of parameters for non-Gaussian autoregressive processes

Use of the crosspower-spectrum phase in acoustic event location

LOCATION M. Omologo P. Svaizer ITC-IRST I-38050 Povo di Trento (Italy) ABSTRACT This orresponden e reports on the use of CrosspowerSpe trum Phase (CSP) analysis as an a urate Time Delay Estimation (TDE) te hnique. It is used in a mi rophone array system for the lo ation of a ousti events in noisy and reverberant environments. A orresponding Coheren e Measure and its graphi al representation are...