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:
Jul. 12, 2011
Filed:
Mar. 19, 2007
Hironori Uchikawa, Kawasaki, JP;
Kohsuke Harada, Yokohama, JP;
Hironori Uchikawa, Kawasaki, JP;
Kohsuke Harada, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A decoder is configured to include an acquisition-unit configured to acquire first respective likelihoods of data-bits and second respective likelihoods of parity-bits. The data-bits and the parity-bits are included in code data obtained by LDPC-encoding the data-bits with a low density parity check matrix. The decoder also includes a detecting-unit configured to detect reliabilities of the first respective likelihoods and the second respective likelihoods. The decoder also includes a forming-unit configured to form an update schedule representing an order of updating the first and second respective likelihoods in order of increasing reliability, in accordance with the reliabilities. The decoder also includes an updating-unit configured to update the first and second respective likelihoods in the order represented by the update schedule, with the low density parity check matrix. The decoder also includes a discriminating-unit configured to execute hard decision of the likelihoods updated by the updating-unit. The decoder also includes a checking-unit configured to execute parity check of a discrimination result of the discriminating-unit, to obtain the code data.