Delay-Coordinates Embeddings as a Data Mining Tool for Denoising Speech Signals
In this paper, we utilize techniques from the theory of nonlinear dynamical systems to define a notion of embedding estimators. More specifically, we use delay-coordinates embeddings of sets of coefficients of the measured signal (in some chosen frame) as a data mining tool to separate structures that are likely to be generated by signals belonging to some predetermined data set. We implement the embedding estimator in a windowed Fourier frame, and we apply it to speech signals heavily corrupted by white noise. Our experimental work suggests that, after training on the data sets of interest, these estimators perform well for a variety of white noise processes and noise intensity levels.
Delay-coordinates embeddings as a data mining tool for denoising speech signals. Napoletani, D. and Struppa, D. C., Sauer, T., Berenstein, C. A., and Walnut, D., Chaos. An Interdisciplinary Journal of Nonlinear Science, 16, 043116 (2006), DOI: 10.1063/1.2384909
American Institute of Physics