Technical Program

Paper Detail

Paper:AE-P4.3
Session:Applications to Music I
Time:Thursday, May 20, 15:30 - 17:30
Presentation: Poster
Topic: Audio and Electroacoustics: Applications to Music
Title: TIME-SCALE MODIFICATION OF MUSIC USING A SYNCHRONIZED SUBBAND/TIME-DOMAIN APPROACH
Authors: David Dorran; Dublin Institute of Technology 
 Robert Lawlor; National University of Ireland 
Abstract: Time-domain audio time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for direct application to complex multi-pitched signals such as polyphonic music. However, it has been shown that applying time-domain algorithms on a subband basis can resolve this issue. Existing subband/time-domain approaches result in a reverberant/phasy artifact being introduced into the output due to poor synchronization between time-scaled subbands. This paper presents a number of synchronization schemes that greatly reduce the amount of reverberation/phasiness introduced into the time-scaled output by existing subband/time-domain approaches.
 
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