Replacing data points in a sequence of peak-to-peak interval calculations

Abstract

Processes for correcting time interval calculations in a dataset are provided. A method, according to one implementation, includes obtaining a sequence of data points (x) representing time interval calculations (y), each time interval calculation (y) based on a length of time between two successive peaks (p) in a photoplethysmography (PPG) waveform, each peak (p) presumed to represent a volumetric blood-flow peak during one of multiple cycles of the PPG waveform. In response to detecting one or more spurious data points in a segment of the sequence, the method includes creating one or more artificial data points for replacing the one or more spurious data points, wherein the one or more artificial data points are derived using the time interval calculation (y) of each of the one or more spurious data points. In some cases, the method may be performed by a smart ring having a PPG sensor and processing device.

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