Patent ID: 7383491

Claim:
A reproducing apparatus to reproduce data from a disk, the disk including an error correction block structure to correct an error in the disk, the reproducing apparatus comprising: an optical pickup to transfer data from the disk; and a controller which controls the optical pickup to detect the error correction block structure from the disk, the error correction block structure comprising: a plurality of error correction blocks, each error correction block including a plurality of inner parity blocks, each inner parity block obtained by segmenting the error correction block in an inner parity (PI) direction; a plurality of f-byte outer parities, each f-byte outer parity adjacent to a corresponding inner parity block in an outer parity (PO) direction; and a plurality of e-byte inner parities, each e-byte inner parity adjacent to a corresponding inner parity block and to a corresponding f-byte outer parity, in an inner parity (PI) direction, wherein the inner parity block having the corresponding e-byte inner parity and the corresponding f-byte outer parity is recognized by the reproducing apparatus so as to correct the error, wherein the size of the error correction block is n bytes, a number of the inner parity blocks is x, the size of the inner parity block is n/x bytes, and x is an integer equal to or greater than 2.