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:
Mar. 24, 1992
Filed:
Dec. 14, 1989
Yuichi Kadokawa, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A device for correcting errors of a long-distance code, when decoding a long-distance code capable of correcting errors up to maximum t words of which one word is composed of w bits, for obtaining a coefficient of each term of an error-position polynomial by setting data words A.sub.(i+j=2) to each element q.sub.i,j of a matrix having t rows and (t+1) columns, where 1.ltoreq.i.ltoreq.t, 1.ltoreq.j.ltoreq.t+1, A.sub.0 to A.sub.2t-1 represent syndromes or error positions, and by performing a left-hand elementary transformation over the matrix in order to obtain each coefficient of each term of the error-position polynomial or error patterns from syndromes has an error position calculating device for obtaining the error positions by utilizing a coefficient calculating circuit of the error-position polynomial and an error pattern calculating circuit.