Time-scale modification of music using a synchronized subband/time-domain approach

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.

[1]  Roland K. C. Tan,et al.  A Time-Scale Modification Algorithm Based on the Subband Time-Domain Technique for Broad-Band Signal Applications , 2000 .

[2]  J. Blauert,et al.  Group delay distortions in electroacoustical systems , 1978 .

[3]  Hyung Soon Kim,et al.  Variable time-scale modification of speech using transient information , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[4]  A. Wilgus,et al.  High quality time-scale modification for speech , 1985, ICASSP '85. IEEE International Conference on Acoustics, Speech, and Signal Processing.

[5]  David Dorran,et al.  Time-scale modification of music using a subband approach based on the bark scale , 2003, 2003 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (IEEE Cat. No.03TH8684).

[6]  Werner Verhelst,et al.  On the Application of Automatic Waveform Editing for Time Warping Digital and Analog Recordings , 1994 .

[7]  James D. Johnston,et al.  Transform coding of audio signals using perceptual noise criteria , 1988, IEEE J. Sel. Areas Commun..

[8]  Eric D. Scheirer,et al.  Tempo and beat analysis of acoustic musical signals. , 1998, The Journal of the Acoustical Society of America.