Method for extracting features from a mixture of signals
AssigneeMitsubish Electric Research Laboratories, Inc.
InventorMichael A. Casey
Life of this patent
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Abstract
A method extracts features from a mixture of signals. The method filters the mixture of signals by a filterbank to produce a plurality of band-pass signals. Each band-pass signal is windowed to produce a plurality of multi-dimensional observation matrices. The multi-dimensional observation matrices are reduced in their dimensionality. Features are extracted from the reduced dimensionality matrices using independent component analysis. The features can include temporal and spectral characteristics.
Claims20
A method for extracting features from a mixture of signals, comprising the steps of:
- filtering the mixture of signals by a filterbank to produce a plurality of filtered signals;
- windowing each filtered signal to produce a plurality of multi-dimensional observation matrices;
- reducing the dimensionality of the multi-dimensional observation matrices;
- and
- extracting features from the reduced dimensionality matrices.
An apparatus for extracting features from a mixture of signals, comprising:
- a filterbank filtering the mixture of signals to produce a plurality of filtered signals;
- a segmentor windowing each filtered signal to produce a plurality of multi-dimensional observation matrices;
- a digital signal processor reducing the dimensionality of the multi-dimensional observation matrices and extracting features from the reduced dimensionality matrices.
Dependencies are inferred from the claim text.