Microphone Position Realignment by Extrapolation of Virtual Microphone

Ryoga Jinzai, Kouei Yamaoka, Mitsuo Matsumoto, Takeshi Yamada, Shoji Makino

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

In this paper, microphone realignment by phase extrapolation using the virtual microphone technique for reproducing binaural signals with adequate the interaural time differences (ITDs) for a listener is proposed. For a sound source in the horizontal plane, ITDs are a major cues for localizing a sound image. Since ITDs are not considered for headphones listening in conventional amplitude panning in multichannel recording, sound images are localized inside the head (lateralization). A microphone array is applicable to recording signals with time differences corresponding to the directions of sound sources. Since microphones in such an array are closely positioned, the time differences are inappropriate as ITDs for localizing sound images for the sources. In this paper, phase extrapolation using the virtual microphone technique is applied to the virtual realignment of a microphone in such an array for restoring ITD. In the experiments with two speeches as sound sources located at the leftmost and the rightmost positions from the viewpoint of two real microphones positioned 2.83 cm apart. Furthermore, the phase of a signal of a virtual realigned microphone is extrapolated eight times as much as the phase between the two real microphones. Time differences between signals of one of the real microphones and the realigned one are observed to be -500\ \boldsymbol{\mu}\mathbf{s} for the source on the left and 500\ \boldsymbol{\mu}\mathbf{s} for the source on the right. Furthermore, the interaural cross correlations of the two signals suggest that sound images will be perceived on both the left and right of a listener. In this method, it is expected that prior information on the number of sources and the direction of arrival is not required, and the adjustment of individual differences is easy.

本文言語English
ホスト出版物のタイトル2018 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2018 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ページ367-372
ページ数6
ISBN(電子版)9789881476852
DOI
出版ステータスPublished - 2019 3 4
外部発表はい
イベント10th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2018 - Honolulu, United States
継続期間: 2018 11 122018 11 15

出版物シリーズ

名前2018 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2018 - Proceedings

Conference

Conference10th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2018
国/地域United States
CityHonolulu
Period18/11/1218/11/15

ASJC Scopus subject areas

  • 情報システム

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