Frequency Warped All-pole Modeling of Vowel Spectra: Dependence on Voice and Vowel Quality
نویسندگان
چکیده
We address the problem of compactly representing the discrete spectral amplitudes of vowel sounds produced by a sinusoidal model. A study of frequency warped all pole model representation of spectral amplitudes has been presented. It has been generally accepted that incorporating Bark scale frequency warping in the all-pole modeling improves the perceived accuracy of the modeled sound. However our study suggests that whether such frequency warped all-pole modeling would improve the modeling accuracy depends on the nature of the vowel as well as the voice. We propose an alternative warping function which may be used to improve the modeling accuracy more universally.
منابع مشابه
Frequency warped modeling of vowel spectra: Dependence on vowel quality
The compact representation of harmonic amplitudes in the sinusoidal coding of speech is an important problem in low bit rate speech compression. A widely used method to achieve this is by the all-pole modeling of the spectral envelope. Often a perceptually warped frequency scale is applied in the all-pole modeling to improve perceived accuracy at low model orders. In this work, an attempt is ma...
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