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An Efficient Phasiness Reduction Technique for Moderate Audio Time-scale Modification
Dorran, David; Coyle, Eugene; Lawlor, Robert
Phase vocoder approaches to time-scale modification of audio introduce a reverberant/phasy artifact into the time-scaled output due to a loss in phase coherence between short-time Fourier transform (STFT) bins. Recent improvements to the phase vocoder have reduced the presence of this artifact, however, it remains a problem. A method of time-scaling is presented that results in a further reduction in phasiness, for moderate time-scale factors by taking advantage of some flexibility that exists in the choice of phase required so as to maintain horizontal phase coherence between related STFT bins. Furthermore, the approach leads to a reduction in computational load within the range of time-scaling factors for which phasiness is reduced.
Keyword(s): phasiness reduction; technique; audio time scale modification; Other Engineering
Publication Date:
Type: Conference item
Peer-Reviewed: Unknown
Institution: Dublin Institute of Technology
Citation(s): Conference papers
Publisher(s): Dublin Institute of Technology
File Format(s): application/pdf
First Indexed: 2009-11-23 16:24:00 Last Updated: 2017-12-14 06:44:00