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:
Jan. 29, 1991
Filed:
Oct. 12, 1989
Hendrik D Hollmann, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
There is described the calculation of a multiplicatively inverted element of an input vector specified in a finite major Galois field. From the set of vector coefficients there is formed a first set of linear forms and a further set of matrix-organized linear forms. The elements of the first set of linear forms are pairwise combined to quadratic forms that represent a set of coefficients of a vector defined in a subfield in the major field. This latter vector is then converted to its multiplicative inverse, after which the inverted subfield-vector has its coefficients multiplied by elements of the further set to generate the multiplicative inverse in the major field. By scrupulously combining the generation of various intermediate terms a further reduction of the necessary hardware and/or processing time is attained.