Phase Effects on Speech and Its Influence on Warped Speech

Abstract

A method of transforming speech from one speaker's voice to another is discussed, which operates by moving speech magnitude information from a source speaker to a target speaker using a process involving dynamic warping in both the time domain and the frequency domain. This process involves only spectral magnitudes, and has been found to introduce significant deleterious signal processing artifacts. It has been found that by reconstruction of phase information significantly improves the quality of the transformed speech.