Error correcting method, disk medium, disk recording method and disk reproducing method

摘要

The disk medium 200 of the present invention includes a sector group 3 including a plurality of positionally continuous sectors 2 in which address information including at least address data and parity data is dispersedly provided in the plurality of sectors of the sector group in a prescribed unit. The address information includes an information sequence described by a combination of at least "0", "1" and an identification mark 4, the identification mark is provided at the head of the sector group, the address data includes data bits, and the parity data includes parity bits. With this structure, it is possible to realize small address redundancy and high reliability of address reproduction.