| 摘要 |
<P>PROBLEM TO BE SOLVED: To acquire content data markedly efficiently. <P>SOLUTION: A music data (output forbidden music data) downloaded to a client terminal 2 is not output to the exterior, unless it is formally purchased, and can be reproduced only for a period in which the user of the client terminal 2 is registered to pay a prescribed fixed amount of money, therefore, it is avoidable to remarkably infringe advantages of a copyright holder etc. as a result, and moreover, since the client terminal 2 does not frequently need to perform processing for downloading the music data, the content data reproducing device is able to acquire the music data markedly efficiently as a result. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
