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Masashi Unoki Professor
School of Information Science、Human Life Design Area

■Degrees

M.S and Ph.D. from Japan Advanced Institute of Science and Technology (1996,1999)

■Professional Career

JSPS Research Fellow (DC2)(1998), Visiting researcher, ATR Human Information Processing Laboratories (1999), Visiting Associate, CNBH, Univ. of Cambridge (2000-2001), JSPS Research Fellow (PD)(1999-2001), Associate of School of Information Science at JAIST (2001-2005)

■Specialties

Modeling of auditory system, Audio Information Hiding, Speech Signal Processing

■Research Keywords

Auditory filterbank, Speech enhancement, Audio watermarking, Blind estimation of room acoustics

■Research Interests

Construction of the auditory filterbank
The aim of this work is to construct the auditory filterbank that can account psycho-acoustical data and physiological data for frequency selectivity of the auditory system.
Computational Auditory Scene Analysis
The study of computational theory of the auditory system tries to answer the following questions:
Extraction of the fundamental frequency of speech in real environments
Extraction of the fundamental frequency (F0) of target speech is an important problem not only in speech analysis/synthesis but also in various speech signal processings such as speech segregation. Various F0 estimation methods have been proposed, but the most of these methods have the drawbacks for estimating accurate F0s of target speech in real environments. My approach is to construct an estimation model based on computational auditory scene analysis (CASA).
A study on the speech dereverberation method
To dereverberate the original signal from a reverberant signal is an important issue concerning speech signal processing such as preprocessing for speech recognition systems. Most of the inverse filtering methods have to measure the impulse response of the room acoustics to determine its inverse filter before the dereverberation. Moreover, the impulse response temporally varies with various environmental factors (temperature etc.), so the room acoustics have to be measured each time these methods are used. In this work, it has been trying to model a speech dereverberation based on the Modulation Transfer Function, without measuring the impulse response of room acoustics.

■Publications

◇Books

  • Method of Digital-Audio Watermarking Based on Cochlear Delay Characteristics, Multimedia Information Hiding Technologies and Methodologies for Controlling Data, Ed. Kazuhiko Kondo, Chapter 2,Masashi Unoki and Ryota Miyauchi,IGI Global,2012,pp. 42-70
  • Effects of spatial cues on detectability of alarm signals in noisy environments, PRINCIPLES AND APPLICATIONS OF SPATIAL HEARING, Edited by Yoiti Suzuki, Douglas Brungart, Hiroaki Kato, Kazuhiro Iida, Densil Cabrera, & Yukio Iwaya,Naoki Kuroda, Junfeng Li, Yukio Iwaya, Masashi Unoki, and Masato Akagi,World Scientific,,2011,484-493
  • Temporal modulation normalization for robust feature extraction and recognition (chapter)Multimedia Tools and Applications,Xugang Lu, Shigeki Masuda, Masashi Unoki, and Satoshi Nakamura,Springer DOI 10.1007/s11042-010-0465-7,2010

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◇Published Papers

  • iDAF-drum: Supporting Practice of Drumstick Control by Exploiting Insignificantly Delayed Auditory Feedback,Akari Ikenoue, Kazushi Nishimoto, Masashi Unoki,Kunifuji, S., Papadopoulos, G.A., Skulimowski, A.M.J., and Kacprzyk, J. eds. "Knowledge Information and Creativity Support Systems", AISC 416, Springer, 2016,pp.483-498
  • iDAF-drum: Supporting Everyday Practice of Drum by Adding an Unperceivable Factor,Kazushi Nishimoto, Akari Ikenoue and Masashi Unoki,Proc. 9th Int'l. Conf. on Knowledge, Information and Creativity Support Systems, 2014,pp.384-395
  • Improvements to Creativity in Singing Abilities Based on Perspective of Studies on Interaction between Speech Production and Auditory Perception,Masashi Unoki and Kazushi Nishimoto,Proc. KICSS 2012, CD-ROM, IEEE, 2012

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◇Lectures and Presentations

  • Study on Effects of Speech Production during Delayed Auditory Feedback for Airconducted and Bone-Conducted Speech,Teruki Toya, Daisuke Ishikawa, Ryota Miyauchi, Kazushi Nishimoto and Masashi Unoki,International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP 2016), 7PM2-1-3,Honolulu,2016/3/
  • iDAF-drum: Supporting Everyday Practice of Drum by Adding an Unperceivable Factor,Kazushi Nishimoto, Akari Ikenoue and Masashi Unoki,9th Int'l. Conf. on Knowledge, Information and Creativity Support Systems,Cyprus,Nov. 6-8, 2014.
  • Improvements to Creativity in Singing Abilities Based on Perspective of Studies on Interaction between Speech Production and Auditory Perception,Masashi Unoki and Kazushi Nishimoto,KICSS 2012,Melbourne, Australia,2012/11/

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■Extramural Activities

◇Academic Society Affiliations

  • Institute of Electronics, Information and Communication Engineers,Senior Member,2014-
  • IEEE,Member,2007-
  • Acoustical Society of America,Member,2005-

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◇Other Activities

  • ASJ,2007/05/01 -
  • IEICE,2012/06/01 - 2013/05/31
  • Applied Acoustic, Elsevier,Associate Editor,2016/04/01 - 2018/12/31

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■Academic Awards Received

  • Best Paper Award,IEEE IIHMSP2009,2009
  • Best Paper Award,IEICE,2017
  • 53th Sato Prize, award for outstanding papers,Acoustical Society of Japan,2013

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