Spectro-temporal analysis of speech signals using zero-time windowing and group delay function
New method for estimation of vocal tract system characteristics from short segments of speech. Zero-time windowing using an impulse-like window function provides temporal resolution. Additive property of the group delay function provides the spectral resolution. Robust to additive noise degradations. Outperforms short-time Fourier analysis, LP analysis and STRAIGHT analysis methods in estimating second and third formants.
zero-time windowing group delay function zero-frequency filtering ngd spectrum hngd spectrum