Improving Time-Scale Modification of Music Signals Using Harmonic-Percussive Separation

A major problem in time-scale modification (TSM) of music signals is that percussive transients are often perceptually degraded. To prevent this degradation, some TSM approaches try to explicitly identify transients in the input signal and to handle them in a special way. However, such approaches ar...

Full description

Saved in:
Bibliographic Details
Published inIEEE signal processing letters Vol. 21; no. 1; pp. 105 - 109
Main Authors Driedger, Jonathan, Muller, Meinard, Ewert, Sebastian
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2014
Subjects
Harmonic analysis
Harmonic-percussive separation
Multiple signal classification
overlap-add
phase vocoder
Signal processing algorithms
Spectrogram
Speech
time-scale modification
Transient analysis
transient preservation
Vocoders
Online AccessGet full text

Cover

More Information
Summary:A major problem in time-scale modification (TSM) of music signals is that percussive transients are often perceptually degraded. To prevent this degradation, some TSM approaches try to explicitly identify transients in the input signal and to handle them in a special way. However, such approaches are problematic for two reasons. First, errors in the transient detection have an immediate influence on the final TSM result and, second, a perceptual transparent preservation of transients is by far not a trivial task. In this paper we present a TSM approach that handles transients implicitly by first separating the signal into a harmonic component as well as a percussive component which typically contains the transients. While the harmonic component is modified with a phase vocoder approach using a large frame size, the noise-like percussive component is modified with a simple time-domain overlap-add technique using a short frame size, which preserves the transients to a high degree without any explicit transient detection.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2013.2294023