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Systems and methods of storing data

  • US 8,874,994 B2
  • Filed: 12/19/2011
  • Issued: 10/28/2014
  • Est. Priority Date: 07/22/2011
  • Status: Active Grant
First Claim
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1. A method of writing data, the method comprising:

  • in a data storage device with a multi-level cell (MLC) memory, performing;

    receiving data including a first group of bits and a second group of bits;

    initiating a shaping encoding operation on the second group of bits to generate a third group of bits, wherein the third group of bits has more bits than the second group of bits, and wherein the shaping encoding operation is configured to produce a non-uniform probability distribution of bit values in the third group of bits;

    storing the first group of bits and first error correction coding (ECC) parity bits corresponding to the first group of bits to a first logical page associated with a physical page of the MLC memory; and

    storing the third group of bits and second ECC parity bits corresponding to the third group of bits to a second logical page associated with the physical page of the MLC memory.

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