Signal processing - Replacing the spectral envelope by long-time and short-time (multirate) probabilistic functions of the spectro-temporal plane.
The spectral envelope is a fragile information carrier. We propose to use probabilities from multiple time-frequency patches. There are several areas of study for this approach:
Statistical Modeling - Modifying the statistical models, both to incorporate these new multirate front ends and to explicitly handle areas of missing information. Modeling features that span different time scales and dependence across scales/streams.
Why multirate vs. redundant features?
Important research issues:
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