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[102] Citation: P.J. Laughlin, J.W. Pitton, B Hannaford, 'Fast Approximations to Positive Time-Frequency Distributions with Applications,'
Proceedings 1995 International Conference on Acoustics, Speech, and Signal Processing, vol. 2, pp. 1009-12, Detroit, May 1995.
Abstract
We present a general approach to approximating positive time-
frequency distributions (TFDs) through nonlinear combinations
of spectrograms. Closed-form solutions for the combinations are
obtained via optimization of entropy functionals subject to an
energy constraint. We apply two such combinations to
generating approximate TFDs for whale sounds and speech.
Through these applications, it can be seen that these methods
give results superior to that achieved with individual
spectrograms, and remarkably close to the positive TFDs
obtained via computationally-intensive methods.
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Updated: Tue Aug 19 09:16:09 2008
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