Instantaneous Harmonic Analysis for Vocal Processing
The paper considers the application of instantaneous harmonic analysis to a real-time vocal processing system for pitch, timbre and time-scale modifications. The analysis technique is based on narrow band filtering using special analysis filters with frequency-modulated impulse response. The main advantage of the technique is high accuracy of harmonic parameters estimation that provides adequate harmonic/noise separation and artifact free implementing of voice modifications. The processing methods described in the paper are based on the harmonic+noise model.