Information reproduction apparatus and information reproduction method
AssigneeKabushiki Kaisha Toshiba
InventorsYosuke KONDO, Kenji Yoshida
Life of this patent
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Abstract
According to one embodiment, an information reproduction apparatus includes a calculator, selector, and decoder. The calculator calculates parity-check passing ratios based on a check matrix of an LDPC code for code word candidates included in a reproduced signal. The selector selects one of the code word candidates based on the parity-check passing ratios calculated by the calculator. The decoder decodes the code word candidate selected by the selector by an iterative decoding process.
Claims12
An information reproduction apparatus comprising:
- a calculator configured to calculate parity-check passing ratios based on a check matrix of an LDPC code for code word candidates included in a reproduced signal;
- a selector configured to select one of the code word candidates based on the parity-check passing ratios calculated by the calculator;
- and
- a decoder configured to decode the code word candidate selected by the selector by an iterative decoding process.
An information reproduction method comprising:
- calculating parity-check passing ratios based on a check matrix of LDPC code for code word candidates included in a reproduced signal;
- selecting one of the code word candidates based on the calculated parity-check passing ratios;
- and
- decoding the selected code word candidate by an iterative decoding process.
An information reproduction apparatus comprising:
- a recording medium configured to store a code word for each sync mark non-recording sector;
- a head configured to read a signal from the recording medium;
- and
- an information reproduction module configured to process the signal read from the recording medium via the head and to reproduce the code word recorded on the recording medium, wherein the information reproduction module comprises:
- a calculator configured to calculate parity-check passing ratios based on a check matrix of an LDPC code for code word candidates included in the signal read from the recording medium;
- a selector configured to select one of the code word candidates based on the parity-check passing ratios calculated by the calculator;
- and
- a decoder configured to decode the code word candidate selected by the selector by an iterative decoding process.
Dependencies are inferred from the claim text.