Separation of Two Sound Sources in the Same Direction by Image Signal Processing

Kenji Ozawa, Yuta Koshimizu, Masanori Morise, Shuichi Sakamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper proposes a novel method to separate a target sound from another noise in the same direction using a microphone array. Four microphones are arranged to focus the target sound, and their outputs are converted to a spatio-temporal sound pressure distribution (STSPD) image. The focused source forms vertical stripes in the image; thus, their two-dimensional fast Fourier transform (2D-FFT) spectral components are localized as the direct current (DC) components along the spatial axis. Meanwhile, a noise signal forms parabola stripes in the STSPD image and their 2D-FFT components are spread into the target spectrum. However, the leaked DC components can be estimated from the other components, and subtracted from the target spectrum. A computational experiment shows that the noise is suppressed by approximately 25 dB, when the positions of the target and noise sources are known.

Original languageEnglish
Title of host publication2018 IEEE 7th Global Conference on Consumer Electronics, GCCE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages663-664
Number of pages2
ISBN (Electronic)9781538663097
DOIs
Publication statusPublished - 2018 Dec 12
Event7th IEEE Global Conference on Consumer Electronics, GCCE 2018 - Nara, Japan
Duration: 2018 Oct 92018 Oct 12

Publication series

Name2018 IEEE 7th Global Conference on Consumer Electronics, GCCE 2018

Other

Other7th IEEE Global Conference on Consumer Electronics, GCCE 2018
CountryJapan
CityNara
Period18/10/918/10/12

Keywords

  • Spatio-temporal sound pressure distribution image
  • Spectral subtraction
  • Spherical wave
  • Two-dimensional FFT

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Instrumentation

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  • Cite this

    Ozawa, K., Koshimizu, Y., Morise, M., & Sakamoto, S. (2018). Separation of Two Sound Sources in the Same Direction by Image Signal Processing. In 2018 IEEE 7th Global Conference on Consumer Electronics, GCCE 2018 (pp. 663-664). [8574514] (2018 IEEE 7th Global Conference on Consumer Electronics, GCCE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GCCE.2018.8574514