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:
Oct. 06, 2020
Filed:
Aug. 29, 2018
Toshiba Memory Corporation, Minato-ku, JP;
Daiki Watanabe, Yokohama, JP;
Toshiba Memory Corporation, Minato-ku, JP;
Abstract
According to one embodiment, a memory system includes a first decoder that decodes read information read from a nonvolatile memory that records therein a multidimensional error-correcting code to output hard decision decoding information of each symbol; a second decoder that performs soft decision decoding in units of component codes for the read information using a soft-input value to output soft decision decoding information of each symbol; a soft-decision-decoding information memory that retains the soft decision decoding information of each symbol; and a soft-input-value specifying unit that obtains the soft-input value of each symbol using the read information and the hard decision decoding information or the soft decision decoding information, and the soft-input-value specifying unit obtains an initial value of the soft-input value using the read information and the hard decision decoding information, and outputs an output decode word obtained as a result of the soft decision decoding when the output decode word is determined to be correct.