Sinusoidal model based on instantaneous frequency attractors

Toshihiko Abe*, Masaaki Honda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


We propose a sinusoidal synthesis method based on instantaneous frequency (IF) attractors, which correspond to harmonic frequency trajectories. The algorithm is novel in extracting accurate sinusoidal components. Since the continuity of IF attractors is well-defined and simple to detect, the IF attractors can be extracted from audio signals without any explicit constraint or complicated algorithm; therefore, they can be directly applied to sinusoidal synthesis. Accuracy of IF attractor analysis can be further improved by time-warping analysis, which improves resolution for harmonic components whose frequencies that change rapidly. We describe the procedure for sinusoidal synthesis and precise phase estimation along with examples and also evaluate the effect of time-warping on analysis and synthesis of speech.

Original languageEnglish
Pages (from-to)1292-1300
Number of pages9
JournalIEEE Transactions on Audio, Speech and Language Processing
Issue number4
Publication statusPublished - 2006 Jul
Externally publishedYes


  • Instantaneous frequency attractors
  • Pitch modification
  • Sinusoidal model
  • Time-scale modification
  • Time-warping analysis

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


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