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http://dx.doi.org/10.6109/jkiice.2017.21.4.708

Implementation of Real-time Sound-location Tracking Method using TDoA for Smart Lecture System  

Kang, Minsoo (School of Electronics, Kumoh National Institute of Technology)
Oh, Woojin (School of Electronics, Kumoh National Institute of Technology)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.21, no.4, 2017 , pp. 708-717 More about this Journal
Abstract
Tracking of sound-location is widely used in various area such as intelligent CCTV, video conference and voice commander. In this paper we introduce the real-time sound-location tracking method for smart lecture system using TDoA(Time Difference of Arrival) with orthogonal microphone array on the ceiling. Through discussion on some models of TDoA detection, cross correlation method using linear microphone array is proposed. Orthogonal array with 5 microphone could detect omni direction of sound-location. For real-time detection we adopt the threshold of received energy for eliminating no-voice interval, signed cross correlation for reducing computational complexity. The detected azimuth angles are processed using median filter for lowering the angle deviation. The proposed system is implemented with high performance MCU of TMS320F379D and MEMs microphone module and shows the accuracy of 0.5 and 6.5 in degree for white noise and lectured voice, respectively.
Keywords
Sound location tracking; Array Microphone; TDoA; Smart Lecture System;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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