| 摘要 |
PROBLEM TO BE SOLVED: To certainly restrict reproduction of contents with a time limit stored in a memory card 12 according to the playback time limit, by preventing a calendar date Da from being retroactively set to the past date. SOLUTION: A calendar date Da successively updated is stored in a memory 28, and a date Db when setting the calendar date Da at the last time or switching on a main power supply from an OFF state is stored in a memory 32. If a required date Ds is inputted by operating a key inputting device 18 so as to change the calendar date Da, a CPU 16 receives the calendar date Da change only when the inputted date Ds is newer than the calendar date Da. On the other hand, when the inputted date Ds is a date before the calendar date Da, the CPU 16 cancels the calendar date Da change. |
