Selection of preset filter parameters based on signal quality

摘要

Methods and devices for reducing noise effects in a system for measuring a physiological parameter, including receiving an input signal, obtaining an assessment of the signal quality of the input signal, selecting coefficients for a digital filter using the assessment of signal quality; and filtering the input signal using the digital filter, without comparing the filter's output signal with the input signal.

主权项

1. A method comprising:
receiving a sequence of digital data inputs at a medical monitor; selecting one or more fixed digital filter coefficients for each digital data input based on at least one signal quality indicator for each respective digital data input, wherein the at least one signal quality indicator provides an estimate of accuracy of each respective digital data input; and filtering each digital data input using the respective one or more digital filter coefficients to generate respective filter outputs, wherein selecting one or more fixed digital filter coefficients comprises: accessing a data bank of stored coefficients.