The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 1997
Filed:
Jul. 07, 1995
Yves Faisandier, Paris, FR;
Ela Medical, S.A., Montrouge, FR;
Abstract
A process of physiological data compression, notably cardiac activity, especially for a recording of an electrocardiogram or a Holter electrogram. This process is characterized by the following successive operations: (a) acquisition of data by collection of an electrical signal and sampling of this signal at a given frequency; (b) determination of the first derivative of the sampled signal; (c) determination of the second derivative of the sampled signal; (d) analyze predictively the sampled signal according to a plurality of values of first and second derivatives and selection, for the current sample, of a mode of coding from among a plurality of predetermined coding modes which are commutable dynamically, in a manner to optimize the global code volume created for coding the aforementioned plurality of future values; and (e) compression of data by the implementation of the coding mode chosen at stage (d). Decompression occurs by the inverse of the compression mode of coding. An apparatus for performing the compression in a Holter recording device is described.