Detection of clean time-frequency bins based on phase derivative of multichannel signals

Atsushi Hiruma, Kohei Yatabe, Yasuhiro Oikawa

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

1 Citation (Scopus)

Abstract

In this paper, a method for evaluating the cleanness of each time-frequency bin of multichannel spectrograms is proposed. When observing acoustical signals with noise and/or interference, the degree of noisiness is usually different for each bin in the time-frequency domain. Therefore, array signal processing techniques should be possible to be improved by choosing only “cleaner” bins, which contain less noise and/or interference, for extracting the spatial information. The proposed method aims to distinguish such clean bins from noisy ones. To do so, the similarity of phase derivative among channels is considered since phase is sensitive to noise and interference. Constant phase is removed by derivative so that convolutive mixtures can be handled without care on spatial condition. The proposed method is applied to direction-of-arrival estimation (MUSIC method) and blind source separation (independent vector analysis) for demonstrating the possibility of the proposed measure.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages2797-2804
Number of pages8
ISBN (Electronic)9783939296157
DOIs
Publication statusPublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 2019 Sep 92019 Sep 23

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
CountryGermany
CityAachen
Period19/9/919/9/23

Keywords

  • Convolutive mixture
  • Group delay
  • Instantaneous frequency
  • Microphone array
  • Multichannel signal processing

ASJC Scopus subject areas

  • Mechanical Engineering
  • Acoustics and Ultrasonics

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