Patent ID: 6915066

Claim:
An information recording medium comprising: a data recording portion; and a management information recording portion, the information recording medium being configured to store information on the data recording portion and the management information recording portion, wherein, the data recording portion contains a video file including video data, the video data containing at least one video object including object units, the management information recording portion contains program chain information designating a reproduction order of the video data in the video file, the program chain information indicates a program type which corresponds to protect information indicating whether or not a program associated with the program chain information is protected, and when the protect information indicates that the program is protected, indication of the protect information means that all video data referred to and utilized in presentation of the program shall not be temporarily or permanently erased, the program chain information further includes cell information representing a cell to be set, which is designated by the program chain information, the cell information further indicating a presentation start time of the cell and a presentation end time of the cell, the presentation start time being required to fall into first four object units of the video object, the presentation end time being required to fall into last four object units of the video object, and the program chain information still further includes cell number information which indicates the number of cells included in the program.