High quality and low complexity pitch modification of acoustic signals

Gang Janp Lin*, Sau-Gee Chen, Terry Wu

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


A high-quality and low-complexity algorithm for pitch modification of acoustic signals is proposed. It is high quality, because time-domain waveform shape and phase synchrony of a synthesized signal closely resemble that of its original signal. Low complexity is attained by performing the algorithm entirely in time domain with fast algorithm, and without resorting to complicated frequency domain analysis consists of fast algorithms of finding minimum absolute error (MAE) and a cross fading operation for high correlation gain and phase synchrony. The MAE-based algorithm is shown to yield smaller complexity, and better performance, than other well-known correlation cost functions. Pitch modification is performed by selecting and synthesizing apposite frames from original input signals in a way such that the original waveform shape and phase synchrony are preserved. Subjective tests showed a comparable performance to that of the best known algorithms, but at much reduced complexity.

Original languageEnglish
Article number479473
Pages (from-to)2987-2990
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
StatePublished - 9 May 1995
EventProceedings of the 1995 20th International Conference on Acoustics, Speech, and Signal Processing. Part 2 (of 5) - Detroit, MI, USA
Duration: 9 May 199512 May 1995

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