Koninklijke Philips Corporation N.v.

Marc Nieuwhof

Martin Ouwerkerk

Navin Hemchand Natoewal

The present invention relates to a system for improving sleep effectiveness of a user. The present invention further relates to a signal processing device () for processing skin conductance data of a user, the device comprising: an input unit () for receiving a skin conductance data signal indicative of a skin conductance of the user; a segmentation unit () for segmenting the skin conductance data signal into a plurality of epochs; a peak detectionunit () for detecting peaks in the skin conductance data signal; a calculation unit () for calculating a sum of rising edge amplitudes of the detected peaks per epoch; an analysis unit () configured to classify the user into an emotional state based on a transient behavior of said sums of rising edge amplitudes per epoch during the course of a day, wherein the analysis unit is configured to classify the user into an unhealthy tired state when the sum of 10 rising edge amplitudes per epoch increases during the course of the day; and/or to classify the user into a healthy tired state when the sum of rising edge amplitudes per epoch decreases during the course of the day; and an output unit configured to output an output signal indicative of said emotional state. The present invention further relates to a corresponding method and computer program implementing such a method.

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Eindhoven, Netherlands

Marc Nieuwhof