Adequacy analysis of autoregressive model for Lithuanian semivowels

Autoregressive model order and parameter estimation technique is proposed and applied for modeling of Lithuanian semivowels. According to experimental results adequate modeling of semivowels requires for model order 72 in average. The appropriate order value differs for female and male voices. Besides, there are remarkable differencies between word starting and middle phones - the last ones are influenced by surrounding vowels inevitably. This results in need for higher order models and higher prediction error attained. The adequacy of autoregressive model was confirmed objectively and subjectively.