| 摘要 |
PROBLEM TO BE SOLVED: To realize a user interface, exhibiting high flexibility and rich in expression for a high capacity recorded medium. SOLUTION: A flag indicating whether a play item has a multiangle structure reproducible at a plurality of angles is provided. A flag indicating whether it is a point capable of switching the angle is provided at the head of a decode unit. In a seamless multiangle structure, the angle can be switched, without increasing interleaving units. In a non-seamless multiangle structure, discontinuity of reproduction is eliminated, when getting out of a multiangle by making a specified region on the tail side of each angle impossible to switch the angle using that flag. Furthermore, a sub-play item only of audio can be employed as BGM, by providing a flag indicating whether the sub-play item can be reproduced asynchronously with a main path. COPYRIGHT: (C)2006,JPO&NCIPI
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