Compression and decompression of numerical data
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United States of America Patent
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Feb 5, 2013
Grant Date -
Nov 17, 2011
app pub date -
May 5, 2011
filing date -
May 11, 2010
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Abstract
The invention relates to a computer-implemented method for compressing numerical data comprising a structured set of floating point actual values. A floating point value is defined by a sign, an exponent and a mantissa. The method comprises computing a floating point predicted value related to a target actual value of the set. The computing includes performing operations on integers corresponding to the sign, to the exponent and/or to the mantissa of actual values of a subset of the set. The method also comprises storing a bit sequence representative of a difference between integers derived from the target actual value and the predicted value. Such a method is particularly efficient for reducing the storage size of a CAD file.
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