Patent ID: 6597649
Filing Date: 2003-07-22
Classification: G11B,H04N

Abstract:
A reproducing apparatus for reproducing information of an optical disk provided with a main information area in which data information is recordable in a recording layer of a groove having a wobble such that said data information is readable using a light, a control data area located at an inner periphery side with respect to said main information area, and a sub information area, wherein in said control data area, other information including first physical format information has been previously recorded at a predetermined position instead of key information used to decipher the data information, said sub information area being configured to store second physical format information with an information structure which differs from an information structure of said control data area, comprisinga pickup that reads recorded signals from said optical disk; a first controller that controls a movement of said pickup; and a second controller that performs a reproducing operation of said data information recorded to said optical disk, wherein said second controller reproduces the second physical format information from said sub information area.