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Summary: REAL-TIME SOUND LOCALIZATION USING FIELD-PROGRAMMABLE GATE ARRAYS
Duy Nguyen, Parham Aarabi, Ali Sheikholeslami
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering
University of Toronto
10 Kings College Road
Ontario, Canada, M5S 3G4 nguyed@ecf,parham@ecf, ali@eecgˇ .utoronto.ca
ABSTRACT
This paper presents a single FPGA implementation of a real-
time sound localization system using two microphones. The
implementation, utilizing a cross-correlation technique based
on a modified version of the phase transform, successfully
localizes sound sources in noisy environments with as low
an SNR as 10dB. Using the same algorithm and similar
hardware architecture, it is shown that up to 5 parallel sys-
tems (using 10 microphones), all real-time, can be imple-
mented on a single FPGA while only utilizing an estimated
77mW-108mW per microphone.
1. INTRODUCTION
Real-time sound localization is required for applications such
as robust speech recognition and automatic teleconferenc-
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