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US 8,020,079 B2Granted
Decoder device, decoding method and magnetic disk device
AssigneeKabushiki Kaisha Toshiba
InventorsYosuke Kondo, Kenji Yoshida
Life of this patent
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Abstract
According to one embodiment, a decoder device includes a decoder configured to decode a to-be-decoded sequence by performing an iterative decoding process and to perform a parity check of a decoding result using a check matrix, a detector configured to detect that the to-be-decoded sequence is a non-code word based on a parity check result for each row of the check matrix by the decoder, and a controller configured to control the decoder according to a detection result of the detector.
Claims15
A decoder device comprising:
- a decoder configured to decode a to-be-decoded sequence by performing an iterative decoding process, and to perform a parity check of a decoding result using a check matrix;
- a detector configured to detect whether the to-be-decoded sequence is an LDPC coded data based on a rate of the number of rows which satisfies a parity equation with respect to a total number of rows of the check matrix by the decoder;
- and
- a controller configured to control the decoder according to a detection result of the detector.
1 more element
A decoder method comprising:
- decoding a to-be-decoded sequence by performing an iterative decoding process and performing a parity check of a decoding result using a check matrix;
- detecting whether the to-be-decoded sequence is an LDPC coded data based on a rate of the number of rows which satisfies a parity equation with respect to a total number of rows of the check matrix by the decoding;
- and
- controlling the decoding according to a detection result of the detecting.
1 more element
A magnetic disk device comprising:
- a magnetic head configured to read data from a magnetic disk;
- an extractor configured to extract a to-be-decoded sequence from data output by the magnetic head;
- a decoder configured to decode the extracted to-be-decoded sequence by performing an iterative decoding process, and to perform a parity check of a decoding result using a check matrix;
- a detector configured to detect whether the extracted to-be-decoded sequence is an LDPC coded data based on a rate of the number of rows which satisfies a parity equation with respect to a total number of rows of the check matrix by the decoder;
- and
- a controller configured to control the decoder according to a detection result of the detector.
3 more elements
Dependencies are inferred from the claim text.