8th Annual Conference of the International Speech Communication Association

Antwerp, Belgium
August 27-31, 2007

Phoneme Dependent Frame Selection Preference

Tingyao Wu, Jacques Duchateau, Dirk Van Compernolle

Katholieke Universiteit Leuven, Belgium

In previous study we proposed algorithms to select representative frames from a segment for phoneme likelihood evaluation. In this paper we show that this frame selection behavior is phoneme dependent. We observe that some phonemes benefit from frame selection while others do not, and that this separation matches the phonetic categories. For those phonemes sensitive to frame selection, we find that selecting frames at some pre-defined positions in the segment enhances the discrimination between phonemes. These phoneme-dependent positions are explicitly retrieved and used in a phoneme classification task. Experimental results on the TIMIT phonetic database show that the frame selection method significantly outperforms decoding by the classical Viterbi decoder.

Full Paper

Bibliographic reference.  Wu, Tingyao / Duchateau, Jacques / Compernolle, Dirk Van (2007): "Phoneme dependent frame selection preference", In INTERSPEECH-2007, 50-53.