SIGNAL DECODING METHOD, SIGNAL DECODING DEVICE AND SIGNAL STORAGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To constitute a check matrix so that an error can be suitably detected by solving a problem that when an error generation position in decoded data is multiplied by all linearly dependent columns included in the check matrix, the error cannot be detected. SOLUTION: An LDPC unit decoding part 332 included in a signal decoding device is provided with a parity check part 344 which is a multiplier for executing multiplication of a temporary estimated value calculated by a temporary estimated value calculation part 342 for an encoded signal and the check matrix. A check matrix holding part 340 holds the check matrix. When it is defined that s and t are natural numbers satisfying s≥t≥2, columns under the t columns out of the s columns extracted from the check matrix have linearly independent relation each other. The s columns are columns by which a position having comparatively high error generation frequency in the temporary estimated value is multiplied. COPYRIGHT: (C)2007,JPO&INPIT