Data storage device encoding and interleaving codewords to improve trellis sequence detection
AssigneeWestern Digital Technologies, Inc.
InventorYIMING CHEN
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Abstract
A data storage device is disclosed comprising a storage medium. First data is encoded into a first codeword comprising a plurality of i-bit symbols, and second data is encoded into a second codeword comprising a plurality of j-bit symbols, wherein i is different than j and a first code rate of the first codeword is less than a second code rate of the second codeword. The first codeword and the second codeword are symbol interleaved to generate an interleaved codeword, and the interleaved codeword is written to the storage medium.
Claims22
1-24. (canceled)
A controller for use in a data storage device, comprising:
- a communication interface configured to communicate data with a storage medium of a data storage device;
- and
- a processor in data communication with the communication interface and configured to:
- encode first data into a first codeword comprising a plurality of i-bit symbols;
- encode second data into a second codeword comprising a plurality of j-bit symbols, wherein i is different than j and wherein a first code rate of the first codeword is less than a second code rate of the second codeword;
- interleave the first codeword and the second codeword to generate an interleaved codeword;
- and
- control the communication interface to write the interleaved codeword to the storage medium.
Control circuitry for use in a data storage device, the control circuitry configured to:
- encode first data into a first codeword comprising a plurality of i-bit symbols;
- encode second data into a second codeword comprising a plurality of j-bit symbols, wherein i is different than j and wherein a first code rate of the first codeword is less than a second code rate of the second codeword;
- interleave the first codeword and the second codeword to generate an interleaved codeword;
- and
- write the interleaved codeword to a storage medium of a data storage device.
A data storage device comprising:
- a storage medium;
- and
- a controller configured to communicate data with the storage medium and configured to:
- decode a first set of reliability metrics with an i-bit symbol decoder to generate a third set of reliability metrics representing a first codeword;
- decode a second set of reliability metrics with a j-bit symbol decoder to generate a fourth set of reliability metrics representing a second codeword;
- interleave the third set of reliability metrics and the fourth set of reliability metrics to generate interleaved reliability metrics representing an interleaved codeword;
- and
- process the interleaved reliability metrics with a trellis detector.
Dependencies are inferred from the claim text.