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Kuroiwa-Horiuchi Lab
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A lab in speech and welfare studying the processing of voice and sign language information.

AboutAbout the lab
Processing voice and sign language information.
The Kuroiwa-Horiuchi Lab focuses on research in speech and welfare.
The lab works on technology that reads a speaker's emotions and impressions from their voice, analysis of prosody such as intonation, and speaker recognition, which identifies who is speaking from their voice.
The lab also does research in welfare, including analysis of sign language, which is used in communication by deaf and hard-of-hearing people.
Key terms
- Prosody
- Features of the voice that are not shown in writing, such as the intonation, rhythm, and tempo of speech
- Fundamental frequency
- The physical quantity corresponding to the pitch of a voice. Intonation is treated as changes in this value
- Speaker recognition
- Technology by which a computer tells who is speaking from features of the voice
ResearchResearch themes
The lab focuses on research in speech and welfare. It studies speech technology that recognizes emotions and speakers from the voice, and welfare research such as sign language analysis.
*Illustrative imageRecognizing Vocal Impressions and Emotions
This research uses a machine to determine, from features of the voice such as its loudness and pitch, the impressions a listener gets from it, such as "anger" or "joy," as well as the speaker's emotions.
*Illustrative imageProsody Analysis and Control
The lab deals with prosody: information carried by the voice that is not expressed in writing, such as the intonation, rhythm, and tempo of speech. It mainly studies the analysis and control of the fundamental frequency, which corresponds to intonation.
*Illustrative imageSpeaker Recognition
This is technology by which a computer recognizes who is speaking from a person's voice. The aim is to pin down what makes a voice characteristic of an individual.
*Illustrative imageSign Language Analysis
Toward the realization of a sign language dialogue system, the lab analyzes sign language. In sign language, besides hand movements, non-manual signals such as nodding and facial expressions also carry important meaning.
MembersFaculty
- ProfessorShingo Kuroiwa
- Associate ProfessorYasuo Horiuchi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ghanaian sign language interpreter working at University of Education Winneba” Uprising Man / CC BY-SA 4.0 (cropped)
- Recognizing Vocal Impressions and Emotions: “Manga emotions-EN” No machine-readable author provided. Erachima assumed (based on copyright claims). / CC BY-SA 3.0 (cropped)
- Prosody Analysis and Control: “Adobe Audition waveform of sound impulses on the police dictabelt analyzed” Roger469 / CC BY-SA 3.0 (cropped)
- Speaker Recognition: “Utaco recording with Blue Snowball Microphone 20111101” Danny Choo / CC BY-SA 2.0 (cropped)
- Sign Language Analysis: “A child watching an American Sign Language video in northern Maracay, Venezuela” Bobjgalindo / CC BY 4.0 (cropped)
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- Related lab (石山研究室): “NCCS Discover Supercomputer (GSFC )” NASA Goddard Space Flight Center / NASA/GSFC/Bill Hrybyk / Public domain (cropped)
- Related lab (関屋・グエン研究室): “Telecommunications towers of Bukit Nyabau, Bintulu” Wee Hong / CC BY-SA 4.0 (cropped)
- Related lab (今泉研究室): “JPEG compression Example” JJ Harrison, side-by-side comparison by Ibrahim.ID / CC BY-SA 3.0 (cropped)
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