| 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
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|
| 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 |