A Pitch Extraction Method Using the Wavelet Transform

摘要

One of the reasons why pitch extraction form speech has been difficult is that pitch is nonstationary and changes over a wide range. In most of the conventional methods, it is assumed that speech remains stationary in an analysis frame of fixed width. This essentially produces an extrac- tion error. In order to remedy this point, there have been attempts to apply the wavelet transform to the pitch extrac- tion, where the resolution can be adjusted dynamically on the time-frequency plane [5,6].