Bradley Department of Electrical & Computer EngineeringVirginia Tech
Title Robust TDE-based DOA Estimation for Compact Audio Arrays
Author(s) Krishnaraj Varma, Takeshi Ikuma, and A. A. (Louis) Beex
Document Type Conference Proceeding
Conference 2002 IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM 2002), Rosslyn VA
Publication Information Pages 214-217
Conference Date 15-19 March 1999
Document Download Available
Abstract

Cross-correlation based time delay estimates (TDE) can be used for direction-of-arrival (DOA) estimation with an acoustic array in not-too-reverberant environments. In order to benefit from the computational efficiency of TDE-based DOA estimation, and concentrating on applications that use a compact microphone array and low sampling frequency, we use a combination of approaches to make TDE-based DOA estimation more robust under reverberant conditions. Cross-correlation interpolation based on the Goertzel algorithm is used for generalized cross-correlation TDE as well as in the steered-response-power algorithm used for comparison. The generalized cross-correlation TDE algorithm precedes a robust TDE-to-DOA process. The latter includes DOA and cross-correlation dependent weighting of the various TDE and removal of an outlier TDE. When the use of TDE from consecutive frames is possible, further performance improvement results from unit-norm DOA adaptation. Performance is evaluated for simulated and recorded data.

Keywords n/a
Related Publications Krishnaraj Varma, Time-Delay-Estimate Based Direction-of-Arrival Estimation for Speech in Reverberant Environments, M.S. Thesis, Virginia Tech, Blacksburg, VA, October 2002.
Related Project Self-Calibrating Acoustic Adaptvive Beamformer
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