The Multiresolution Spectral Analysis for Automatic Detection of Transition Zones

This paper presents an automatic method for detecting transition zones based on multiresolution spectral analysis (MRS). The MRS is calculated over several Fast Fourier Transforms (FFT) of different length. It can provide a higher temporal accuracy in the upper spectral region and a better frequency resolution in the lower spectral range. We showcase the importance of this tool by attempting an automatic detection of zones of transition by calculating the Interquartile Range (IQR) of each frame of the MRS FFT. We applied our Visual Assistance of Speech Processing (VASP) System to a corpus. This corpus was in French pronounced by french speakers and has the format CiV CiV with Ci was a stop consonant [p t k] and V was a vowel [i e]. The results showed that the automatic detection of transition zones based on MRS provides better results compared to classical spectral analysis of the corpora used.