Patent ID: 7406635

Claim:
An information recording medium comprising: a management area where management information is recorded; and a plurality of physical sector areas used to record a plurality of physical sector data blocks, which are generated by combining some data contained in an FCC block containing a plurality of segmented blocks, wherein the ECC block as a source of the plurality of physical sector data blocks to be recorded in said plurality of physical sector areas is generated via a predetermined process, and the predetermined process generates the ECC block by: generating m sector data (m: an even number) which contains a data ID and is formed of a first number of bytes and n data lines (n: an even number); rearranging m sector data by (i) arranging n data lines of each of the m sector data such that even-numbered lines are in one column and odd-numbered lines are in another column, and (ii) exchanging data lines between columns in every other sector data; generating a sector block by combining m re-arranged sector data; generating the plurality of segmented blocks by segmenting the sector block; generating outer-code parity data by encodings data in a column direction, data which forms each segmented block; generating inner-code parity data by encoding, in a row direction, data which forms each segmented block and the generated outer-code parity data; and individually appending the generated outer- and inner-code parity data to each segmented block.