Patent ID: 6289305
Filing Date: 2001-09-11
Classification: G10L

Abstract:
A method for analyzing a full voiced utterance in speech, comprising the steps of:recording speech;dividing the recorded speech into plural time frames;finding roots for a denominator polynomial for each of the plural time frames;identifying a complete voiced region in the plural time frames of the divided recorded speech;selecting in said plural successive time frames of said voiced region a starting time frame which contains a low frequency energy peak indicative of a center of a vowel sound;using roots of the starting time frame as seeds for producing plural root tracks;extending the plural root tracks by linking corresponding roots of each preceding time frame in the complete voiced region to corresponding root tracks and by linking corresponding roots of each subsequent time frame in the complete voiced region to corresponding root tracks; andassigning a number of the plural root tracks to said number of formant frequencies representing the complete voiced region after the root tracks have been fully extended.