Apparatus and method for data processing of physiological signals

摘要

A filter apparatus (100) having a signal input (101) to which an input signal is applied which contains a useful component and a noise component, a fast signal path (102) and a slow signal path (103) arranged in parallel therewith. The fast signal path and the slow signal path are coupled to the signal input. The fast signal path contains a filter in order to prompt fast filtering of the input signal. The slow signal path contains a filter in order to prompt slow filtering of the input signal. An output of the slow signal path is coupled to the fast signal path by means of a signal line (106). A signal output (104) which is coupled to the fast signal path has an output signal applied to it which essentially contains useful components of the input signal.

主权项

1. A filter apparatus comprising:
a signal input, at which an input signal is present, which input signal contains a useful component and a noise component; a fast signal path, the fast signal path having a fast signal path input and a fast signal path output; a slow signal path arranged in parallel to the fast signal path, the slow signal path having a slow signal path input and a slow signal path output; a signal line coupling the slow signal path output with the fast signal path to change a characteristic of said fast signal path, wherein the signal input is coupled with the fast signal path input and of the slow signal path input, wherein the fast signal path contains a filter to bring about fast filtering of the input signal and wherein the slow signal path contains a filter to bring about slow filtering of the input signal; a signal output coupled with the fast signal path output and at which an output signal, which contains essentially useful components of the input signal, is present; and another signal line via which a signal is returned from the fast signal path to the slow signal path to affect the functional characteristic of the slow filter path, wherein an output of the fast signal path is coupled via the another signal line with an input of the slow signal path and wherein physiological signals from a patient, which are used after their filtering to drive a respirator, are present at the signal input, wherein said input signal is a physiological signal from a patient, said physiological signal passing through said fast signal path and through said slow signal path, wherein a signal travel time in said fast signal path is shorter by a factor of at least two than a signal travel time in said slow signal path, said another signal line connecting said fast signal path output of said fast signal path with said slow signal path input of said slow signal path to change said functional characteristic of said slow filter path, wherein said filter of said fast signal path comprises nonlinear properties, said filter of said slow signal path comprising linear properties or an adaptive filter.