Patent ID: 7401285

Claim:
An error correction method directed to error correction blocks encoded on an HD-DVD, each error correction block having a plurality of data rows and data columns, the method comprising: segmenting each error correction block into a plurality of data blocks of a predetermined size; adding a plurality of outer parity matrices to the plurality of the data blocks, wherein each outer parity matrix having a size of f data rows is added to an end of each data block of the plurality of data blocks, in an outer parity (PO) direction; and adding a plurality of inner parity matrices to the plurality of the data blocks, wherein each inner parity matrix having a size of e data columns is added to a side of each data block including the corresponding outer parity matrix, in an inner parity (PI) direction, wherein a number of data columns of the data block and data columns of the inner parity matrix is less than or equal to 256.