| 摘要 |
PROBLEM TO BE SOLVED: To recover the information, when damaged. SOLUTION: The karaoke machine A obtains data 1 from the host A (S1) and data 2 from the outer media DVD (S2). The file management record inside the karaoke A becomes as shown by (b). Then, the karaoke machine B acquires data 1 (S3) and data 2 (S4) from the karaoke A, and the file management records inside the karaoke B becomes as shown by (c). Although the acquisition history 2 becomes the copied content of the acquisition history 1 from the karaoke A, the attribute of the DVD used to obtain the data becomes Ver1.27, when the acquisition history 2 of the data 2 is the copied acquisition history 1 of the record obtained from the karaoke B, the acquisition attribute 2 of the data 2 is deleted (S5), because the karaoke B has no interface for the outer media. Each karaoke machine checks the CRC of the data and recovers them, according to the acquisition history in the file management record, if damages are detected. COPYRIGHT: (C)2005,JPO&NCIPI
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