14th International Congress of Phonetic Sciences (ICPhS-14)
San Francisco, CA, USA
In the paper the method for Polish alphabet classification in the speaker independent system will be presented. The first fundamental problem that occurred was the speaker variability. According to the linear acoustic theory of speech production we examined the approaches described in the literature: speaker normalization through formant-based and pitch-based warping of the frequency scale as well as through the appropriate transformations in the domain of the cepstral parameters. We compared one of the above vocal tract length normalization approaches with the new one consisting in using separable features in different parts of the frequency scale in order to exclude the less informative parts of the spectrum during the cepstral analysis.
Bibliographic reference. Grocholewski, Stefan (1999): "Method for Polish alphabet classification", In ICPhS-14, 1689-1692.