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Journal of Speech, Language, and Hearing Research Vol.45 482-493 June 2002. doi:10.1044/1092-4388(2002/038)
© American Speech-Language-Hearing Association
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Interaction of Speech Coders and Atypical Speech I

Effects on Speech Intelligibility

Donald G. Jamieson 1
Vijay Parsa 1
Moneca C. Price 1

James Till 2
1 National Centre for Audiology The University of Western Ontario London, Ontario, Canada
2 California State University Long Beach

parsa{at}nca.uwo.ca

We investigated how standard speech coders, currently used in modern communication systems, affect the intelligibility of the speech of persons who have common speech and voice disorders. Three standardized speech coders (viz., GSM 6.10 [RPE-LTP], FS1016 [CELP], FS1015 [LPC]) and two speech coders based on subband processing were evaluated for their performance. Coder effects were assessed by measuring the intelligibility of vowels and consonants both before and after processing by the speech coders. Native English talkers who had normal hearing identified these speech sounds. Results confirmed that (a) all coders reduce the intelligibility of spoken language; (b) these effects occur in a consistent manner, with the GSM and CELP coders providing the least degradation relative to the original unprocessed speech; and (c) coders interact with individual voices so that speech is degraded differentially for different talkers.

KEY WORDS: speech coding, speech intelligibility, disordered speech, voice disorders

Submitted on July 2, 2001
Accepted on March 7, 2002




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E. S. Klein and C. B. Flint
Measurement of intelligibility in disordered speech.
Lang Speech Hear Serv Sch, July 1, 2006; 37(3): 191 - 199.
[Abstract] [Full Text] [PDF]


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