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. Author manuscript; available in PMC: 2013 May 13.
Published in final edited form as: IEEE Trans Biomed Eng. 2012 Jun 14;59(9):10.1109/TBME.2012.2204882. doi: 10.1109/TBME.2012.2204882

Fig. 4.

Fig. 4

Example of the MCAF prediction and estimated point-by-point SQI using the PPG signal as target. Because of filtering, there is a 5-s delay in the SQI. The SQI is based on the error between the recorded PPG signal and its MCAF reconstruction, labeled as “Prediction.” All recorded channels (including those which are badly corrupted) were used as inputs to the MCAF filter. The MCAF filter adaptively selects the best channels for prediction.