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:
Oct. 13, 1998
Filed:
Dec. 18, 1996
Lambert Muhlenberg, Landgraaf, NL;
Medtronic, Inc., Minneapolis, MN (US);
Abstract
A system and method for more efficient data compression is provided, being particularly applicable to use in battery powered devices where there is a premium on minimizing the steps required and the amount of memory that must be dedicated to the task. The invention utilizes the technique of determining a delta or difference between each successive sample of the signal and the prior sample; examining the delta signals for a block comprising a predetermined number of such delta signals; determining the largest absolute delta value; determining the number of bits required to store such largest delta; and then storing both the determined number of bits and each delta value which is encoded with such determined number of bits. The block size is chosen to correspond to the type of signals being processed, and for typical medical applications is selected as a size within the range of 5-12 samples. The compressed data can be efficiently transmitted, such as from an implanted medical device to an external receiver, and decompressed by algebraically adding each delta to the value of the prior sample to recreate the respective samples and the signal.