Sixth International Conference on Spoken Language Processing (ICSLP 2000)
October 16-20, 2000
Influence of Duration on Static and Dynamic Properties of German Vowels in Spontaneous Speech
Britta Wrede, Gernot A. Fink, Gerhard Sagerer
Bielefeld University, Faculty of Technology, Bielefeld, Germany
Changes in speech rate severely affect the performance of
continuous speech recognition systems. In order to better
understand the underlying effects of speech rate changes an
analysis was carried out on the influence of duration on the
spectral properties of vowels in a large German corpus of
spontaneous speech. The results show a strong centralisation
effect og the vowel formant frequencies due to shorter
duration while the formant movements are only slightly affected.
The data suggest that the movement velocity is not
changed in vowels with a limited duration. As the means
of the on- and offset frequencies also remain stable only
the middle part of the vowels are affected by the centralisation effect.
These results are discussed in the light of
the modelling of varying speech rate in automatic
speech recognition systems.
Wrede, Britta / Fink, Gernot A. / Sagerer, Gerhard (2000):
"Influence of duration on static and dynamic properties of German vowels in spontaneous speech",
In ICSLP-2000, vol.1, 82-85.