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:
Nov. 23, 1999
Filed:
Jun. 10, 1997
Masayuki Koyama, Tokyo, JP;
Naohiro Kobayashi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kiasha, Tokyo, JP;
Abstract
A bidirectional FILO capable of continuously performing the function of the FILO for different groups of codes is used to reduce a circuit scale of a Reed-Solomon error correcting device. Coefficients of an error-locator polynomial .delta.(x) and an error-evaluator polynomial .omega.(x) obtained by using a Euclid method are obtained in order from a final digit of a code to a first digit thereof. Correspondingly, a corrector starts a Chien search in order from a final byte of the code to a first byte thereof. In response to the order of the search, each group of data RSIN (Reed-Solomon Input) having digit order reversed in a bidirectional FILO are given to the corrector. The code corrected by the corrector also has digit order reversed. Therefore, the digit order is returned to original order in the bidirectional FILO for returning digit order to original order, so that a code RSOUT (Reed-Solomon Input) is output. The bidirectional FILOs can be implemented by operation of a shift register type, for example.