Apparatus and method for manufacturing optical disks, apparatus and method for recording data on optical disks, apparatus and method for reproducing data from optical disks, and optical disk formed with pit strings and mark strings

An optical disc recording method comprising:

• generating a main signal from main data;
• generating a sub signal from sub data;
• and
• producing a laser beam and forming pit strings or mark strings on an optical disc based on said main signal, including positionally deviating an irradiation area of the pit strings or mark strings in a radial direction from a track center of a track on the optical disc according to said sub signal, and
• an amount of the positional deviation in the radial direction is within a range that supports detection by an integration of reproducing data of the pit strings or mark strings deviated according to said sub signal.

An optical disc manufacturing apparatus configured to manufacture an optical disc, comprising:

• an optical substrate manufacturing unit configured to manufacture an optical disc substrate;
• a main signal generating unit configured to generate a main signal from main data;
• a sub signal generating unit configured to generate a sub signal from sub data;
• and
• a data recording mechanism configured to form pit strings or mark strings on the optical disc based on said main signal, and to positionally deviate an irradiation area of the pit strings or mark strings in a radial direction from a track center of a track on the optical disc according to said sub signal, and
• an amount of the positional deviation in the radial direction is within a range that supports detection by an integration of reproducing data of the pit strings or mark strings deviated according to said sub signal.

An optical disc manufacturing method for manufacturing an optical disc, comprising:

• generating a main signal from main data;
• generating a sub signal from sub data;
• and
• forming pit strings or mark strings on the optical disc based on said main signal, and positionally deviating an irradiation area of the pit strings or mark strings in a radial direction from a track center of a track on the optical disc according to said sub signal, and
• an amount of the positional deviation in the radial direction is within a range that supports detection by an integration of reproducing data of the pit strings or mark strings deviated according to said sub signal.

An information processing device comprising:

• an input configured to receive a main signal from main data;
• a sub signal generating unit configured to generate a sub signal having bits from sub data;
• and
• a modulation device configured to generate a signal for controlling or positional deviation of a laser beam in a radial direction from a center of a track or an optical disc, said positional deviation being in accordance with bits of said sub signal, such that
• an amount of the positional deviation in the radial direction is within a range that supports detection by an integration of reproducing data of the pit strings or mark strings deviated according to said sub data.