Physiological signals processing system

• US 4,633,884 A
• Filed: 05/23/1984
• Issued: 01/06/1987
• Est. Priority Date: 05/24/1983
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisya Advance Kaihatsu Kenkyujo
• Original Assignee: Kabushiki Kaisya Advance Kaihatsu Kenkyujo
• Inventors: Sasaki, Minoru, Imai, Hideki
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/613,293
• Time in Patent Office: 958 Days
• Field of Search: 364/415, 128/695-710
• US Class Current: 600/509
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/7232 involving compression of the physiological signal, e.g. to extend the signal recording period

Abstract

In a physiological signals processing system including (a) a A/D conversion means for converting physiological signals into digital signals and (b) a data compression means for reducing the number of data points sampled from said digital signals, the improvement which comprises: said data compression means being provided with a first sampling means for sampling a pair of combined peak points from said digital signals by applying the second order differential conversion to said digital signals, and a second sampling means for sampling level points by the level detection of said digital signals in the portion where adjacent peak points are not combined.

Claims

1. In a physiological signals processing system including (a) a A/D conversion means for converting physiological signals into digital signals and (b) a data compression means for reducing the number of data points sampled from said digital signals, the improvement which comprises:

said data compression means being provided with a first sampling means for sampling a pair of combined peak points from said digital signals by applying a second order differential conversion to said digital signals, and a second sampling means for sampling level points by the level detection of said digital signals in the portion where adjacent peak points are not combined.

2. The system of claim 1 in which said system is further provided with a data reconstruction means for reconstructing signals by interpolating the sampled data points with a spline function modified by a tension factor so as to eliminate the distortion from the reconstructed signals.