Patent ID: 8218408

Claim:
An information recording medium, wherein conversion information, obtained by inverting all bits of each of m numbers (2≦m<n; m is an integer) of symbols of an error correction code word including symbol C(i) [i=0, 1, 2, . . . n; n is an integer], is recorded by a wobble form of a track, the error correction code word is obtained by coding on address information of the information recording medium with an error correction code which is a cyclic code, at least one non-bit-inverted symbol is presented among m numbers of bit-inverted symbols, a plurality of bit-inverted symbols are divided into k number (k is an integer of 2 or greater) of symbol groups which are not adjacent to each other, at least one of the symbol C(0) and the symbol C(n) is a non-bit-inverted symbol, and a number which is 2 times k is larger than the number of symbols which can be corrected by the error correction code.