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Signal compression based on curvature parameters

  • US 8,280,508 B2
  • Filed: 02/24/2009
  • Issued: 10/02/2012
  • Est. Priority Date: 06/27/2003
  • Status: Active Grant
First Claim
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1. A system comprising:

  • an input circuit adapted to receive a sampled signal;

    a controller coupled to the input circuit and programmed to;

    generate a curvature series as a function of the sampled signal, the curvature series corresponding to a curvature signal;

    identify lobes in the curvature series, the lobes each corresponding to a portion of the curvature signal starting when the curvature signal crosses a first threshold in one direction and ending when the curvature signal crosses a second threshold in an opposite direction;

    calculate an area for each lobe of the identified lobes between the portion of the curvature signal corresponding to the each lobe and a baseline;

    identify a parameter of the each lobe if the area of the each lobe is greater than a predetermined value; and

    generate a characteristic point including a time of the parameter and an amplitude corresponding to the time of the parameter; and

    a memory coupled to the curvature series generator and adapted to store the characteristic points generated by the controller.

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