| 摘要 |
PROBLEM TO BE SOLVED: To provide a user interface having high flexibility and rich in high representational power for a large-capacity recorded medium. SOLUTION: A flag that represents whether a play item has a multi-angle structure, of which the play item can be reproduced with a plurality of angles is provided. In addition, a flag that represents whether the beginning of each decode unit is an angle switchable point is provided. In a seamless multi-angle structure, the angle can be switched without need to increase the number of interleave units. In a non-seamless multi-angle structure, with the flag, in a predetermined region on the rear end side of each angle, switching of the angle is set disabled. Thus, when a play item exits from the multi-angle, discontinuity in the reproduction can be prevented. In addition, with a flag that represents whether a sub play item can be reproduced asynchronously with a main path, the sub play item of only audio can be used as BGM. COPYRIGHT: (C)2009,JPO&INPIT
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