每两个单元间具有视频交叉链路通信路径，将能够进行系统备份。
A video cross link communication path between both units will enable system redundancy.
该路径变化信息表示重现至少视频数据重现路径中的一个的变化所被允许之处。
The path change information indicates where changes in reproducing at least one of the reproduction paths of video data are permitted.
每个导航区域存储用于管理从记录介质再现至少多个再现路径视频数据的导航管理信息。
The navigation area stores navigation management information for managing the reproduction of at least multiple reproduction path video data from the recording medium.
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