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FLASH MEMORY SYSTEM AND OPERATING METHOD THEREOF

  • US 20160210190A1
  • Filed: 07/17/2015
  • Published: 07/21/2016
  • Est. Priority Date: 01/21/2015
  • Status: Active Grant
First Claim
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1. An operation method of a flash memory system having a controller and a memory device, the operation method comprising:

  • performing hard decision decoding on a codeword, which is encoded in units of message blocks with row constituent codes and column constituent codes according to a block-wise concatenated BCH (BC-BCH) method;

    identifying a location of an error message block to which the hard decision decoding fails among a plurality of the message blocks, when the hard decision decoding fails;

    generating soft decision information corresponding to the row constituent codes and the column constituent codes of the error message block; and

    performing soft decision decoding on the error message block based on the soft decision information.

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