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Apparatus and method for solid state storage of episodic signals

  • US 4,920,489 A
  • Filed: 08/14/1987
  • Issued: 04/24/1990
  • Est. Priority Date: 08/14/1987
  • Status: Expired due to Fees
First Claim
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1. A method of digitally storing electrocardiogram signals in solid state memory, including the steps of:

  • (a) sampling analog electrocardiogram signals at a fixed sampling rate from at least one channel of an electrocardiogram apparatus,(b) converting each sampled signal to a multibit digital sample representing its amplitude,(c) calculating the differences in amplitude between each consecutive digital sample,(d) identifying a predetermined number of groups of a predetermined number of consecutive digital samples having the highest sums of the absolute values of said differences,(e) storing a number related to each digital sample from the ones of said predetermined number of groups,(f) storing a number related to every Rth digital sample from the digital samples outside of said predetermined number of groups, where R is an integer greater than one and is a function of the sampling rate.

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