The ESCA Workshop on Speech Synthesis
September 25-28, 1990
All segment durations measured in the phonetically balanced SCRIBE 200-sentence database were converted to standard normal form for each phoneme, with resulting distributions having zero mean and variance 1, to allow comparisons of the relative compression and expansion applied to different segments with regard to position in the syllable and in the utterance. The data was divided into four subsets; segments in syllables from sentence-final position formed one group, then taking the plus-minus one sd cutoff as criterial, the remainder were divided according to membership of syllables assigned to long, intermediate and short classes. Results are presented which show that segments in sentence-final position undergo greater lengthening in the ryme than in the onset, whereas segments that are lengthened sentence-internally, for stress and rhythmic reasons, are lengthened uniformly throughout the syllable. Segments in short syllables are similarly found to be shortened uniformly, regardless of position in the syllable and of phonemic distinction.
Bibliographic reference. Campbell, W. Nick (1990): "Normalised segment durations in a syllable frame", In SSW1-1990, 169-172.