INFORMATION RECORDING MEDIUM, INFORMATION REPRODUCING DEVICE, AND INFORMATION REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To secure the secrecy of information for controlling recorded copy. SOLUTION: A record mark made long or short in accordance with first data is formed at a position at which the mark is varied in the direction of intersecting with its reading direction in accordance with a wobble signal obtained by modulating second data with the prescribed modulation system. A second start position at which the head of the second data is recorded exists at a position being separated from a first start position at which the head of the first data is recorded by the prescribed value. COPYRIGHT: (C)2005,JPO&NCIPI