About this phasiness business

Abstract

The phase-vocoder is a w ell-known tool for the frequency domain processing of speech or audio signals, with applications such as time-scale or pitch-scale modiaecation.In this context, the phasevocoder is usually considered to yield high-quality results, but is also known for an artifact that plagues its output, and has been described in the literature as either "phasiness", "reverberation", or "loss of presence".This paper examines the problem of phasiness in the context of time-scale modiaecation of signals, and presents a new phase synchronization scheme which is shown to both signiaecantly improve the sound quality, and reduce the computational cost of such modiaecations.