Patent ID: 9230595
Filing Date: 2016-01-05
CPC Classification: G11B,H03M

Claim Text:
1. An error correction method, comprising: a data reproduction step of reproducing recording data, constituted by a plurality of data units each made of a plurality of bits, from a recording medium sequentially while detecting a sync pattern included in each data unit; an error correction step of performing error correction in a row direction and error correction in a column direction at least once for an error correction code block in which the plurality of data units reproduced in the data reproduction step are arranged in the row direction over a plurality of rows; a determination step of determining whether uncorrectable data is left behind after execution of the error correction step; and an erasure correction step of performing, when it is determined that uncorrectable data is left behind in the determination step, error correction in the column direction considering data constituting at least one row of the error correction code block as erasure data, even in a case where uncorrectable data in the error correction in the row direction is not left behind.