School of Information and Data Sciences, Nagasaki University

  • 言語切替アイコン
  • inquiry iconInquiry
  • access iconAccess
  • sitemap iconSitemap
Research Activities

Staff Introduction

Shoichi MATSUNAGA
教員顔写真
Position・Degree
  • Institute of Integrated Science and Technology, Professor
  • School of Information and Data Sciences, Professor
  • Graduate school of engineering, Professor
  • Doctor (Engineering)
Email
matcis.nagasaki-u.ac.jp
Researcher number
90380815
Date of arrival
Nagasaki University: Apr.2004 –
Areas of Research
Information Extraction from Body Sound Using Statistical Method, Recognition of free speech
CV
Mar.1979
Kyusyu University, School of Engineering, Graduated
Mar.1981
Kyusyu University, Graduate School of Engineering, Master Course, Completed
Apr.1981
Nippon Telegraph and Telephone Corporation
July 1992
Kyusyu University, Doctor of Engineering
Apr.1993
ATR Spoken Language Translation Research Laboratories, Researcher
July 1993
Massachusetts Institute of Technology, Visiting Researcher
Apr.2004
Nagasaki University, School of Engineering, Professor

Research activities

 Information extraction from body sounds
①Extraction of information from breath sounds
We are conducting research on a lung sound test system that can easily detect lung sounds at home and detect abnormalities at an early stage, such as a body fat meter or blood pressure monitor. We research a method to detect abnormal sounds from characteristics differences between abnormal sounds (called side noise) and normal lung sounds (using fluctuations in the frequency and energy of lung sounds).
研究活動1
Lung sounds of diseased persons including heart sounds (S1) and side noise
②Emotion estimation from baby’s cry
We research methods to estimate emotions such as “anger” and “sadness” from differences in the characteristics of baby crying. We use information on how childcare experts hear crying and make decisions because it is difficult to know the true emotions of a baby. Being able to know a little about the emotions when a baby is crying can help new moms and dads.
 Recognition of free speech
Free speech is speech that we speak with others emotionally in our daily lives. Due to the development of speech recognition technology, the accuracy of speech recognition has greatly improved, and it has become possible to recognize speech utterances of TV newscasters and voice commands for operating machines with extremely high accuracy. On the other hand, there are many issues to be solved for high-precision recognition in free speech. We research a recognition system that takes into account the unique grammar, words, speakers, and utterances in order to achieve high-accuracy speech recognition. We aim to automatically create meeting minutes and things like that.
 Students Awards in 2019
  • Encouraging Prize (IEICE, Kyusyu Section)
    Keishi Fukunaga:
    Construction of speaker cluster for recognition considering speaker characteristics of conference speech
    Naoki Umeno:
    Extension of Learning Data Considering Similarity of Auscultation Sound Spectrum for Detection of Abnormal Lung Sound
    Wint Yee:
    Acoustic Features for Detection of Emotion in Infant Cry and Abnormal Lung Sound
  • Best Paper Award (The 10th International Conference on Science and Engineering 2019)
    Wint Yee:
    Effective Acoustic Feature Parameters for Emotion Estimation of Infant Crying Sound

Educational activities

Class
School of Information and Data Sciences / School of Engineering:
Programming Exercise Ⅰ
School of Engineering:
First year Seminar, Information Theory, AI, Acoustic Speech Engineering, Knowledge Engineering, Information Engineering Experiment Ⅲ
Graduate school of engineering (Master):
Advanced Acoustic Speech Engineering
Graduate school of engineering (Doctor):
Advanced Software Engineering

トップへ