A Contribution for the Automatic Sleep Classification Based on the Itakura-Saito Spectral Distance

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Sleep staging is a crucial step before the scoring the sleep apnoea, insubjects that are tested for this condition. These patients undergo a whole nightpolysomnography recording that includes EEG, EOG, ECG, EMG andrespiratory signals. Sleep staging refers to the quantification of its depth.Despite the commercial sleep software being able to stage the sleep, there is ageneral lack of confidence amongst health practitioners of these machineresults. Generally the sleep scoring is done over the visual inspection of theovernight patient EEG recording, which takes the attention of an expert medicalpractitioner over a couple of hours. This contributes to a waiting list of twoyears for patients of the Portuguese Health Service. In this work we have used aspectral comparison method called Itakura distance to be able to make adistinction between sleepy and awake epochs in a night EEG recording,therefore automatically doing the staging. We have used the data from 20patients of Hospital Pulido Valente, which had been previously visually expertscored. Our technique results were promising, in a way that Itakura distancecan, by itself, distinguish with a good degree of certainty the N2, N3 and awakestates. Pre-processing stages for artefact reduction and baseline removal usingWavelets were applied.
Original languageUnknown
Title of host publicationIFIP Advances in Information and Communication Technology
Publication statusPublished - 1 Jan 2010
Event1st IFIP Doctoral Conference on Computing, Electrical and Industrial Systems -
Duration: 1 Jan 2010 → …


Conference1st IFIP Doctoral Conference on Computing, Electrical and Industrial Systems
Period1/01/10 → …

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