5th European Conference on Speech Communication and Technology

Rhodes, Greece
September 22-25, 1997

Applications for the Hearing-Impaired: Evaluation of Finnish Phoneme Recognition Methods

Matti Karjalainen (1), Peter Boda (2), Panu Somervuo (3), Toomas Altosaar (1)

(1) Acoustics Laboratory, Nokia Research Center Helsinki University of Technology, Hut, Finland (2) Speech and Audio Systems Laboratory, Tampere, Finland (3) Neural Networks Research Centre, Helsinki University of Technology, Hut, Finland

It has been hypothesized that the Finnish language is well suited to speech-to-text conversion for the communication aids of the hearing impaired. In a related study it was shown that, depending on context, 10 to 20 % of phoneme errors can be tolerated with good comprehension when reading text converted from raw phonemic recognition. Two sets of phoneme recognition experiments were carried out in this study in order to evaluate the performance of existing speech recognition systems in this ap-plication. For telephone bandwidth speech both systems showed speaker dependent error scores of about 10 % or below, thus supporting the feasibility of the application. For speaker independent cases the error rate was typically more than 20 % which is too high for effortless and fluent communication.

Full Paper

Bibliographic reference.  Karjalainen, Matti / Boda, Peter / Somervuo, Panu / Altosaar, Toomas (1997): "Applications for the hearing-impaired: evaluation of finnish phoneme recognition methods", In EUROSPEECH-1997, 1811-1814.