Patent ID: 7292523

Claim:
A recording medium, comprising: a recording layer provided on a recordable area on said medium, said recordable area including a Program Memory Area, a Power Calibration Area, a Lead In Area and a User Data recording area; and a recording track formed by a groove on said recording medium, the groove representing predetermined information by wobbling of the groove; wherein a material information code, product type, manufacturer code, highest speed code, and an inertia code are included as the predetermined information represented by the wobbling of the groove, said material information code identifies a material of said recording layer of said recording medium, said product type indicates a type number or product code of the recording medium, said manufacturer code indicates a manufacturer of the recording medium, said highest speed code indicates the highest constant linear velocity recording speed, and said inertia code indicates the moment of inertia of the recording medium, and said material information code is a three-bit code indicating one of a cyanine, phthalocyanine, azo compound, or phase change material.