Error correction method for high density disc

摘要

An error correction method for optical discs, and more particularly, an error correction method appropriate to high density discs is provided. The error correction method adding inner parity and outer parity to an error correction block with n byte x m x o size have the steps of obtaining a plurality of inner parity blocks (PI blocks) by segmenting the error correction block to the inner parity (PI) direction into x segments (here, x is an integer equal to or greater than 2); generating e-byte PI for each of the plurality of PI blocks generated by segmenting, and adding the PIs to the PI direction; and generating f-byte outer parity (PO) to the PO direction of the error correction block having PIs, and adding the POs to the PO direction. The error correction method maintains redundancy of parity signal in the similar level to the existing DVDs, while enhancing error correction capability.