Speech Segmentation Aspects of Phone Transition Acoustical Modelling

Abstract

The paper presents our experiences with the phone transition acoustical models. The phone transition models were compared to the traditional context dependent phone models. We put special attention on the speech signal segmentation analysis to provide a better insight into certain segmentation effects when using the different acoustical models. Experiments with the HMM-based models were performed using the HTK toolkit, which was extended to provide proper state parameter tying for the phone transition models. All the model parameters were estimated on the GOPOLIS speech database. The annotation confusions concerning two-phone speech units are also discussed.