| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that since programs which cannot be reproduced exist in recorded data or data which cannot be recognized by a recording device exist, available capacity of a recording medium seems to be less than the actual available capacity. SOLUTION: When it can be judged that data required for reproducing is deficient and it is obvious that reproduction cannot be performed due to damage, data is erased automatically. When information which cannot be recognized exists in a part of data recorded in the recording medium, data which cannot be recognized is erased automatically. COPYRIGHT: (C)2009,JPO&INPIT
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