Computer-aided recognition of polish vowels in continuous speech

Vowels pronounced by male voices in typical Polish sentences were the object of the recognition. Vowel formants as variable time functions were meas¬ured from the spectrograms. In the first experiment, the patterns for each phoneme in the form of two-element mean vectors and the appropriate co-variance matrices were averaged over various combinations of 10 voices. In the second experiment the patterns were averaged separately for each of 10 per¬sons. Quadratic and linear discriminant functions were used for the recognition. In general, the recognition scores in experiment I reached 75 % and in experiment II — 90 %. It is assumed that in the automatic recognition of Polish vowels in a computer-aided man-machine system and using two features, high scores may be obtained. They are improved by an adaptation of the system to the operator's voice.