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A Pitch-Synchronous Extension of Fractal Additive Synthesis via Time-Varying Cosine Modulated Filter Banks

Fractal additive synthesis (FAS) is a method for the synthesis-by-analysis of voiced-sounds. FAS is based on a harmonic version of the wavelet transform (WT), and it allows to define two different parametric models for the deterministic and the stochastic components of sounds, respectively. In this letter, we introduce a pitch-synchronous (PS) extension of FAS. By adapting an already existing method for the design of time-varying cosine modulated filter banks (TV-CMFB), we are now able to deal with a much wider class of voiced-sounds, i.e., any voiced-sound showing a variable pitch as in the case, for example, of glissando or vibrato effects.