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다중 거리 센서를 사용한 강의용 광역 마이크 시스템

Wide-range Lecturing Microphone System using Multiple Range Sensor

  • Oh, Woojin (School of Electronic Engineering, Kumoh National University of Technology)
  • 투고 : 2022.03.31
  • 심사 : 2022.04.13
  • 발행 : 2022.05.31

초록

In this paper, a wide-range microphone system for lectures using dual 3D sensors is proposed. A previous work using a single sensor had lowering the detecting threshold to support wide-area. However it was found that an error occurred when lecturer wears clothes with low reflectivity or has small body size. When multiple sensors are used to expand the coverage it could be cause various problems. Each sensor could show different distance to the same target. We derive the rotation angle and and compensate for lecturing microphone system using sensors on the line. The proposed method shows a little improvement in performance by about 1dB compared to the previous works but the performance is uniform in all areas regardless of reflectivity.

키워드

과제정보

This research was supported by Kumoh National Institute of Technology (2019104079)

참고문헌

  1. J. Benesty, M. M. Sondhi, and Y. Huang, Springer handbook of speech processing, New York, NY: Springer, 2008.
  2. S. -W. Seo and M. Kim. "3D Impulsive Sound-Source Localization Method through a 2D MEMS Microphone Array using Delay-and-Sum Beamforming," in Proceedings of the 9th International Conference on Signal Processing Systems (ICSPS 2017), Auckland, New Zealand, pp. 170-174, 2017.
  3. E. Yavari, C. Song, V. Lubecke, and O. Boric-Lubecke, "Is there anybody in there?: Intelligent radar occupancy sensors," IEEE Microwave Magazine, vol. 15, no. 2, pp. 57-64, Mar-Apr. 2014. https://doi.org/10.1109/MMM.2013.2296210
  4. M. Hansard, S. Lee, S, O. Choi, and R. Horaud. Time-of-flight cameras: principles, methods and applications, New York, NY: Springer Science & Business Media, 2012.
  5. W. Oh, "Wide Coverage Microphone System for Lecture Using Ceiling-Mounted Array Structure," Journal of the Korea Institute of Information and Communication Engineering, vol. 22, no. 4, pp. 624-633, Apr. 2018. https://doi.org/10.6109/JKIICE.2018.22.4.624
  6. W. Oh, "Widerange microphone system using 3D range sensor," Journal of the Korea Institute of Information and Communication Engineering, vol. 25, no. 10, pp. 1448- 1451, Oct. 2021. https://doi.org/10.6109/JKIICE.2021.25.10.1448
  7. 2D/3D Dual CygLiDAR D1 User Manual, Ver 1.0.9 [Internet] https://www.cygbot.com/downloads
  8. J. Kim, K. Kwak, and K. Bae, "Experimental analysis and internal calibration of the 3D LIDAR reflectivity," Journal of the Korean Institute of Control, Robotics and Systems, vol. 23, no. 7, pp.574-582, Jul. 2017. https://doi.org/10.5302/J.ICROS.2017.17.0086
  9. B. -S. Park, D. -W. Kim, and Y. -H. Seo "A method of improving the quality of 3D images acquired from RGB-depth camera," Journal of the Korea Institute of Information and Communication Engineering, vol. 25, no. 5, pp. 637-644, May. 2021 https://doi.org/10.6109/JKIICE.2021.25.5.637