@inproceedings{0c4aa09a7f6944c3b7cc93f4ad0013bb,
title = "Virtually increasing microphone array elements by interpolation in complex-logarithmic domain",
abstract = "In this paper, we propose a new array signal processing technique for an underdetermined condition by increasing the number of observation channels. We introduce virtual observation as an estimate of the observed signals at positions where real microphones are not placed. Such signals at virtual observation channels are generated by the complex logarithmic interpolation of real observed signals. With the increased number of observation channels, conventional linear array signal processing methods can be applied to underdetermined conditions. As an example of the proposed array signal processing framework, we show experimental results of speech enhancement obtained with maximum SNR beamformers modified using the virtual observation.",
keywords = "beamformer, Linear array signal processing, speech enhancement, underdetermined, virtual observation",
author = "Hiroki Katahira and Nobutaka Ono and Shigeki Miyabe and Takeshi Yamada and Shoji Makino",
year = "2013",
language = "English",
isbn = "9780992862602",
series = "European Signal Processing Conference",
publisher = "European Signal Processing Conference, EUSIPCO",
booktitle = "2013 Proceedings of the 21st European Signal Processing Conference, EUSIPCO 2013",
note = "2013 21st European Signal Processing Conference, EUSIPCO 2013 ; Conference date: 09-09-2013 Through 13-09-2013",
}