Patent ID: 7370267

Claim:
A high density digital versatile disk (HD-DVD) for use in a recording and/or reproducing apparatus, the disk including an error correction block structure to correct an error in the disk with the recording and/or reproducing apparatus, the error correction block structure comprising: a plurality of correction blocks, each correction block being segmented into a plurality of data blocks of a predetermined size by the recording and/or reproducing apparatus; an outer parity matrix having a size of f data row provided at an end of a data block of the plurality of data blocks, in an outer parity (PO) direction by the recording and/or reproducing apparatus; and an inner parity matrix having a size of e data column provided at a side of the data block, in an inner parity (PI) direction by the recording and/or reproducing apparatus, wherein the data block having the outer parity matrix and the inner parity matrix is recognized by the recording and/or reproducing apparatus so as to correct the error, wherein when x is a number of the segmented data blocks, o is a number of data frames in the PI direction in the corresponding segmented data block, and f is a number of data rows in the outer parity matrix, a result of multiplication of x with f is divided by o without a remainder.