Method and apparatus for pre-processing PPG signal
US11642087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2020 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Feb 6, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7278
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for pre-processing a photoplethysmogram (PPG) signal include receiving, by an apparatus, the PPG signal including a plurality of pulses, obtaining, by the apparatus, a smoothed PPG signal based on smoothing the PPG signal using a moving average filter, obtaining, by the apparatus, a drift removed PPG signal based on removing drift from the smoothed PPG signal using a fitted polynomial function, and obtaining, by the apparatus, a rectified PPG signal based on correcting a motion artifact of the drift removed PPG signal by replacing each of the plurality of pulses using a combination of a global signal pulse and a corresponding local signal pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.