Patent ID: 7401268

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 ECC 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 sector data which contains a data ID and is formed of a first number of bytes (172 bytes×12 rows); generating re-arranged sector data formed of 172 bytes×6 rows×2 by re-arranging data contained in the sector data to predetermined positions; generating a sector block formed of 172 bytes×6 rows×2×32 by combining 32 of re-arranged sector data items; generating two segmented blocks formed of 172 bytes×6 rows×32 by dividing the sector block into two segmented blocks; generating outer-code parity data formed of 16 rows by encoding, in a column direction, data formed of 6 rows×32 which forms each of the segmented block; generating inner-code parity data by encoding, data in a row direction, data formed of 172 bytes 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.