Vowel onset point based variable frame rate analysis for speech recognition

The consonant and transition regions around the vowel onset point bear important contextual cues for distinguishing between different classes of consonant vowel units. It is important to model these regions for improved speech recognition rates. Conventional fixed frame rate analysis does not distinguish between the different regions of the speech signal In this paper we detail an approach to emphasize the consonant and transition regions in speech sounds using a variable frame rate, anchored around the vowel onset point. The usefulness of this technique is demonstrated on an isolated consonant-vowel recognition task for Indian languages. ©2005 IEEE.