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http://dx.doi.org/10.7776/ASK.2011.30.3.115

Hardware Design of Enhanced Real-Time Sound Direction Estimation System  

Kim, Tae-Wan (경희대학교 전자.전파공학과)
Kim, Dong-Hoon (LIG넥스원(주) 연구개발본부 Maritime 연구소)
Chung, Yun-Mo (경희대학교 전자.전파공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.30, no.3, 2011 , pp. 115-122 More about this Journal
Abstract
In this paper, we present a method to estimate an accurate real-time sound source direction based on time delay of arrival by using generalized cross correlation with four cross-type microphones. In general, existing systems have two disadvantages such as system embedding limitation due to the necessity of data acquisition for signal processing from microphone input, and real-time processing difficulty because of the increased number of channels for sound direction estimation using DSP processors. To cope with these disadvantages, the system considered in this paper proposes hardware design for enhanced real-time processing using microphone array signal processing. An accurate direction estimation and its design time reduction is achieved by means of an efficient hardware design using spatial segmentation methods and verification techniques. Finally we develop a system which can be used for embedded systems using a sound codec and an FPGA chip. According to experimental results, the system gives much faster real-time processing time compared with either PC-based systems or the case with DSP processors.
Keywords
Sound direction estimation; Generalized Cross Correlation; Time Delay of Arrival; Microphone array signal processing; Field Programmable Gate Array(FPGA);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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