Envelope-invariant analytical speech resynthesis using periodic signals derived from reharmonized frame spectrum

摘要

Method envelope-invariant for audio signal synthesis from elementary audio waveforms stored in a dictionary wherein: the waveforms are perfectly periodic, and stored as one of their period, synthesis is obtained by overlap-adding of the waveforms obtained from time-domain repetition of the periodic waveforms with a weighting window whose size is approximately two times the period of the signals to weight, and whose relative position inside of the period is fixed to any value identical for all the periods, each extracted from a reharmonized and thus periodic waveform, obtained by modifying, without changing the spectral envelope, the frequencies and amplitudes of harmonics in the spectrum of a frame of the original continuous speech waveform, whereby the time shift between two successive waveforms obtained by weighting the original signals is set to the imposed fundamental frequency of the signal to synthesize.