Unstable covariance LPC solutions from nonstationary speech waveforms
Chan Ng, Paul Milenkovic · IEEE Transactions on Acoustics Speech and Signal Processing · 1989
Linear Predictive Coding (LPC) analysis of speech is made using a stationary model while parts of speech such as stop consonants are highly nonstationary. An asymptotic analysis is made of the stability of the LPC model obtained from a simplified model of a nonstationary waveform. This model is used to predict the occurrence of unstable LPC models in the analysis of a stop consonant.>