Performance of noise excitation for unvoiced speech
Gernot Kubin, Bishnu Saroop Atal, Willem Bastiaan Kleijn · 2005
Recent interest in nonlinear modeling of speech has brought up the need to re-assess the performance limitations of linear speech models. While nonlinearity is essential in the production mechanism of speech, it need not be reflected in a speech-signal model. This paper addresses the question what perceptual quality can be achieved for unvoiced speech by a linear model with white noise excitation. Formal MOS test results demonstrate that this linear model results in unvoiced speech of high perceptual quality.