DECODING METHOD AND DECODING DEVICE FOR LDPC CODE, AND OPTICAL INFORMATION REPRODUCING DEVICE USING THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide a decoding method and a decoding device for low-density parity check codes (LDPC codes) for correcting errors due to misalignment, and to provide an optical information reproducing device that uses the same. PSOLUTION: A bit is initialized to the initial value of a received signal. Iterative decoding is conducted in a row direction and in a column direction to obtain the posteriori value of the bit, to decide according to the posteriori value whether the iterative decoding is to be advanced again. If the iterative decoding is to be advanced, the posteriori value is compared with a set value, and the initial value of the bit is updated. PCOPYRIGHT: (C)2008,JPO&INPIT