Patent ID: 7346828

Claim:
A data recording medium manufactured by a recording apparatus, the data recording medium storing information by forming error correction code (ECC) blocks, the ECC blocks comprising: a plurality of sectors including said information; a first PO creation block relating to one of the ECC blocks which includes even-numbered rows in even-numbered sectors and odd-numbered rows in odd-numbered sectors; and a second PO creation block relating to an other one of the ECC blocks which includes odd-numbered rows in even-numbered sectors and even-numbered rows in odd-numbered sectors, wherein some rows of one of the sectors are included in the first PO creation block, and remaining rows of the same sector are included in the second PO creation block, and wherein the recording process of the recording apparatus comprises: creating the first PO creation block; creating the second PO creation block; creating a first PO into the first PO creation block, each row of the first PO being interleaved into the first PO creation block; creating a second PO into the second PO creation block, each row of the second PO being interleaved into the second PO creation block; and creating a PI for each of the rows.