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Peripheral vision lipreading aid.

D Ebrahimi1, H Kunov

  • 1Institute of Biomedical Engineering, University of Toronto, Ont., Canada.

IEEE Transactions on Bio-Medical Engineering
|October 1, 1991
PubMed
Summary
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This study developed a wearable peripheral vision display to aid lipreading for deaf individuals. The novel eyeglasses significantly improved speech recognition accuracy by over 76% compared to lipreading alone.

Area of Science:

  • Audiology
  • Human-Computer Interaction
  • Sensory Substitution

Background:

  • Profoundly deaf individuals have limited access to speech cues through lipreading alone.
  • Peripheral vision offers an alternative sensory modality for supplementary speech information.
  • Existing assistive technologies often lack cosmetic acceptability for daily use.

Purpose of the Study:

  • To evaluate the utility of a cosmetically acceptable peripheral vision display for enhancing lipreading.
  • To investigate the effectiveness of visual speech feature encoding for deaf individuals.
  • To improve speech communication for profoundly deaf individuals using sensory substitution.

Main Methods:

  • Developed a wearable display integrated into eyeglasses with a 5x7 red LED array.

Related Experiment Videos

  • Encoded key speech features (fundamental frequency, high-frequency energy, envelope) into visual patterns.
  • Presented visual speech information in the wearer's temporal visual field.
  • Assessed performance using vowel-consonant-vowel syllables with aided vs. unaided lipreading.

    • Main Results:

    • The peripheral vision display successfully conveyed speech information.
    • Aided lipreading performance exceeded 76% accuracy.
    • Unaided lipreading achieved only 41% accuracy.
    • The display provided supplementary information on voicing and plosion/frication.

    Conclusions:

    • A cosmetically acceptable peripheral vision display can significantly enhance speech information for lipreaders.
    • This sensory substitution approach offers a promising method for improving communication for the deaf.
    • Further development could integrate more complex speech features for even greater benefit.