Department of Linguistics University of Illinois at Urbana-Champaign

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Mark Allan Hasegawa-Johnson

Professor of Linguistics
Electrical & Computer Eng
Beckman Institute

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  • Address:
    University of Illinois
    2011 Beckman Institute, MC-251
    405 N. Mathews Ave.
    Urbana, Illinois 61801
  • Telephone: (217) 333-0925
  • Email:
  • Homepage: Visit Website
CV: Download my C.V.

Research Interests

Dr. Hasegawa-Johnson's research is focused on the area of automatic speech recognition, with a particular focus on the mathematization of linguistic concepts. In the past five years, Dr. Hasegawa-Johnson's group has developed mathematical models of concepts from linguistics including a rudimentary model of pre-conscious speech perception (the landmark-based speech recognizer), a model that interprets pronunciation variability by figuring out how the talker planned his or her speech movements (tracking of tract variables from acoustics, and of gestures from tract variables), and a model that uses the stress and rhythm of natural language (prosody) to disambiguate confusable sentences. Recent application successes include: * Speech recognition for talkers with cerebral palsy. The automatic system, suitably constrained, outperforms a human listener. * Retrieval of broadcast television segments in four languages, based on queries specified in the international phonetic alphabet. The Illinois team, including students of Prof. Hasegawa-Johnson and Prof. Huang, took third place in this international competition, and was the only finalist from the United States. * Automatic detection and labeling of non-speech audio events. The Illinois team, including students of Prof. Hasegawa-Johnson and Prof. Huang, took first place in this international competition. * Teaching Chinese. Software and methods developed by Prof. Hasegawa-Johnson, together with his colleagues from Linguistics and Psychology, are being tested in Mandarin language classrooms at the University of Illinois.