Patent ID: 6067462
Filing Date: 2000-05-23
Classification: A61B,G06K

Abstract:
In a signal processor for processing at least two signals M.sub.1 and M.sub.2, the signal M.sub.1 containing a primary signal portion S.sub.1 and a secondary signal portion N.sub.1, the signal M.sub.2 containing a primary signal portion S.sub.2 and a secondary signal portion N.sub.2, said signals M.sub.1 and M.sub.2 having the flowing relationship:M.sub.1 =S.sub.1 +N.sub.1M.sub.2 =S.sub.2 +N.sub.2,a method comprising the steps of:determining a value for a coefficient c, such that an error value e, given by the relation e=S.sub.1 -(cM.sub.1 -M.sub.2) is partially minimized, where said coefficient c is related to a ratio of a frequency-domain representation of M.sub.1 and a frequency-domain representation of M.sub.2 ; andusing said coefficient c in a waveform scrubber to remove some of the secondary signal portion N.sub.1 from the signal M.sub.1 to produce an approximation A.sub.1 to said primary signal portion S.sub.1, where A.sub.1 =cM.sub.1 -M.sub.2.