4 papers
Automatic scoring of apnea and hypopnea events using blood oxygen saturation signals
R. E. Rolon, I. E. Gareis, L. D. Larrateguy +3
The obstructive sleep apnea-hypopnea (OSAH) syndrome is a very common and frequently undiagnosed sleep disorder. It is characterized by repeated events of partial (hypopnea) or tot…
A multi-class structured dictionary learning method using discriminant atom selection
R. E. Rolón, L. E. Di Persia, R. D. Spies +1
In the last decade, traditional dictionary learning methods have been successfully applied to various pattern classification tasks. Although these methods produce sparse representa…
Switching divergences for spectral learning in blind speech dereverberation
Francisco Ibarrola, Leandro Di Persia, Ruben Spies
When recorded in an enclosed room, a sound signal will most certainly get affected by reverberation. This not only undermines audio quality, but also poses a problem for many human…
Mixed penalization in convolutive nonnegative matrix factorization for blind speech dereverberation
Francisco J. Ibarrola, Leandro E. Di Persia, Ruben D. Spies
When a signal is recorded in an enclosed room, it typically gets affected by reverberation. This degradation represents a problem when dealing with audio signals, particularly in t…