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US 2014/0157086 A1Published application
Storage and retrieval of shaped data
AssigneeSanDisk Technologies LLC
InventorsERAN SHARON, IDAN ALROD, OMER FAINZILBER, ARIEL NAVON
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Abstract
Systems and methods of encoding and decoding shaped data include determining a bit representation corresponding to a bit in a representation of a codeword that is read from a non-volatile memory of a data storage device. A soft metric corresponding to the bit representation is determined at least partially based on an amount of shaping of data.
Claims63
A method comprising:
- in a data storage device including a non-volatile memory, performing:
- receiving a representation of a codeword that is read from the non-volatile memory;
- determining a shaping level of a set of one or more bits of the representation of the codeword;
- determining a soft metric of each bit of the one or more bits of the representation of the codeword based on a value of the bit in the received representation and based on the shaping level;
- and
- initiating a decoding operation of the codeword based on the soft metrics.
3 more elements
A data storage device comprising:
- a non-volatile memory;
- and
- a controller configured to:
- read a representation of a codeword from the non-volatile memory;
- determine a shaping level of a set of one or more bits of the representation of the codeword;
- determine a soft metric of each bit of the one or more bits of the representation of the codeword based on a value of the bit in the received representation and based on the shaping level;
- and
- initiate a decoding operation of the codeword based on the soft metrics.
5 more elements
A method comprising:
- in a data storage device including a non-volatile memory, performing:
- determining an amount of shaping of data to be written to the non-volatile memory;
- selecting at least one programming parameter at least partially based on the amount of shaping;
- and
- programming the data to the non-volatile memory according to the at least one selected programming parameter.
2 more elements
A data storage device comprising:
- a non-volatile memory;
- and
- a controller configured to:
- determine an amount of shaping of bit values in data to be written to the non-volatile memory;
- select at least one programming parameter at least partially based on the amount of shaping;
- and
- program the data to the non-volatile memory according to the selected programming parameter.
4 more elements
A method comprising:
- in a data storage device including a controller and a flash memory, performing:
- shaping data to be stored to the flash memory to generate shaped data;
- encoding the shaped data to generate encoded shaped data;
- scrambling the encoded shaped data to generate scrambled data;
- and
- programming the scrambled data into the flash memory.
3 more elements
A data storage device comprising:
- a flash memory;
- and
- a controller configured to:
- shape data to be stored to the flash memory to generate shaped data;
- encode the shaped data to generate encoded shaped data;
- and
- program scrambled data into the flash memory,
- wherein the encoded shaped data is scrambled to generate the scrambled data.
5 more elements
A method comprising:
- in a data storage device including a controller and a non-volatile memory, performing:
- descrambling scrambled data that is read from the non-volatile memory to generate a representation of a codeword;
- determining a shaping level of the representation of the codeword;
- and
- determining a soft metric for decoding based on the representation of the codeword and based on the shaping level.
2 more elements
A data storage device comprising:
- a non-volatile memory;
- and
- a controller configured to:
- descramble scrambled data that is read from the non-volatile memory to generate a representation of a codeword;
- determine a shaping level of the representation of the codeword;
- and
- determine a soft metric for decoding based on the representation of the codeword and based on the shaping level.
4 more elements
A method comprising:
- in a data storage device including a controller and a non-volatile memory, performing:
- determining an amount of shaping of data, the data to be stored in the non-volatile memory;
- scrambling the data prior to storing the data in the non-volatile memory in response to the amount of shaping being less than a threshold;
- and
- storing the data in the non-volatile memory as unscrambled data in response to the amount of shaping satisfying the threshold.
2 more elements
A data storage device comprising:
- a non-volatile memory;
- and
- a controller configured to:
- determine an amount of shaping of data, the data to be stored in the non-volatile memory;
- set an indicator to have a first value to cause scrambling of the data prior to storing the data in the non-volatile memory in response to the amount of shaping being less than a threshold;
- and
- set the indicator to have a second value to cause the data to be stored in the non-volatile memory as unscrambled data in response to the amount of shaping satisfying the threshold.
4 more elements
A method comprising:
- in a data storage device including a non-volatile memory, performing:
- determining a bit representation corresponding to a bit in a representation of a codeword that is read from the non-volatile memory;
- determining a soft metric corresponding to the bit representation, wherein the soft metric is at least partially based on an amount of shaping of data stored in the non-volatile memory;
- and
- initiating a decoding operation of the soft metric.
2 more elements
A data storage device comprising:
- a non-volatile memory;
- and
- a controller configured to:
- determine a bit representation corresponding to a bit in a representation of a codeword that is read from the non-volatile memory;
- determine a soft metric corresponding to the bit representation, wherein the soft metric is at least partially based on an amount of shaping of data stored in the non-volatile memory;
- and
- initiate a decoding operation of the soft metric.
4 more elements
A data storage device comprising:
- a non-volatile memory;
- and
- a controller configured to:
- determine an amount of shaping of bit values in data to be written to the non-volatile memory;
- select a storage location of the data within the non-volatile memory at least partially based on the amount of shaping;
- and
- program the data to the selected storage location within the non-volatile memory.
4 more elements
A method comprising:
- in a data storage device including a non-volatile memory, performing:
- determining an amount of shaping of bit values in data to be written to the non-volatile memory;
- selecting a storage location of the data within the non-volatile memory at least partially based on the amount of shaping;
- and
- programming the data to the selected storage location within the non-volatile memory.
2 more elements
Dependencies are inferred from the claim text.