| 摘要 |
PROBLEM TO BE SOLVED: To make it difficult to copy the recorded data of a recording medium on another recording medium. SOLUTION: Reproduced information is subjected to an arithmetic operation in which added information is a coefficient, and it is high-quality information with respect to basic information. Thus, the amount of information is larger than the basic information. When the information is recorded on another recording medium in this state, a large amount of a recording medium is necessary. COPYRIGHT: (C)2004,JPO |
