Speech Morphing by Independent Interpolation of a Spectral Envelope and Source Excitation

摘要

A speech morphing algorithm based on progressive interpolation of spectral envelopes and source signals is proposed. The basic morphing scheme is; 1) determine the time correspondence for unit waveforms of original and target speech, 2) separate speech spectra into an envelope nad a sound source, 3) obtain the frequency correspondence for spectral channels of original and target speech for each envelope, 4) interpolate both source signal and envelope, 5) construct a unit waveform, and 6) generate morphing speech by PSOLA.