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The use of cone-shaped kernels for generalized time-frequency representations of nonstationary signals

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3 Author(s)
Zhao, Y. ; Interactive Syst. Design Lab., Washington Univ., Seattle, WA, USA ; Atlas, L.E. ; Marks, R.J., II

Generalized time-frequency representations (GTFRs) which use cone-shaped kernels for nonstationary signal analysis are presented. The cone-shaped kernels are formulated for the GTFRs to produce good resolution simultaneously in time and frequency. Specifically, for a GTFR with a cone-shaped kernel, finite time support is maintained in the time dimension along with an enhanced spectrum in the frequency dimension, and the cross-terms are smoothed out. Experimental results on simulated data and real speech show the advantages of the GTFRs with the cone-shaped kernels through comparisons to the spectrogram and the pseudo-Wigner distribution

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:38 ,  Issue: 7 )