Information storage medium and information recording/playback system
There are provided an information storage medium capable of real-time recording/playback of digital moving picture information, and a digital information recording/playback system using this medium. In a medium that records/plays back data including video data and control information, the control information (DA 21 in FIG. 4 ; RTR_VMG in FIG. 30 ) includes information (VOBU entry in FIG. 31 ) for accessing a specific portion (VOBU) of the video data.
1. A machine readable information storage medium for access by an information playback system,
the information storage medium embodied as an optical disc comprising:
a first area in which a video object is recorded; and
a second area in which control information is recorded,
the control information including first program chain information and second program chain information,
the first program chain information relating to a first program chain,
the second program chain information relating to a second program chain,
cells being specified by the control information,
the first program chain specifying a first playback sequence of one part of the cells,
the second program chain specifying a second playback sequence of another part of the cells,
a first cell of the one part of cells referring to a first region of the video object,
a second cell of the another part of cells referring to a second region of the video object,
a part of the first region being able to overlap with the second region to enable playback of the part of the first region,
another part of the first region being able not to include the second region,
one of the cells corresponding to a specific ID,
the specific ID relating to Main video or Sub video,
the first program chain information including information which relates to a total number of the one part of cells,
the control information including information which relates to a timing for playback, and
the control information including information which indicates an audio signal coding type,
wherein the control information is read and provided to play back the video object by the information playback system, and
the video object is accessed according to the read control information.
2. An information playback method for information playback from an information storage medium embodied as an optical disc including,
a first area in which a video object is recorded, and
a second area in which control information is recorded,
the control information including first program chain information and second program chain information,
the first program chain information relating to a first program chain,
the second program chain information relating to a second program chain,
cells being specified by the control information,
the first program chain specifying a first playback sequence of one part of the cells,
the second program chain specifying a second playback sequence of another part of the cells,
a first cell of the one part of cells referring to a first region of the video object,
a second cell of the another part of cells referring to a second region of the video object,
a part of the first region being able to overlap with the second region to enable playback of the part of the first region,
another part of the first region being able not to include the second region,
one of the cells corresponding to a specific ID,
the specific ID relating to Main video or Sub video,
the first program chain information including information which relates to a total number of the one part of cells,
the control information including information which relates to a timing for playback, and
the control information including information which indicates an audio signal coding type,
the information playback method comprising:
reading the control information; and
accessing and playing back the video object based on the read control information.
3. An information recording method for recording information on an information storage medium embodied as an optical disc including,
a first area in which a video object is recorded, and
a second area in which control information is recorded,
the control information including first program chain information and second program chain information,
the first program chain information relating to a first program chain,
the second program chain information relating to a second program chain,
cells being specified by the control information,
the first program chain specifying a first playback sequence of one part of the cells,
the second program chain specifying a second playback sequence of another part of the cells,
a first cell of the one part of cells referring to a first region of the video object,
a second cell of the another part of cells referring to a second region of the video object,
a part of the first region being able to overlap with the second region to enable playback of the part of the first region,
another part of the first region being able not to include the second region,
one of the cells corresponding to a specific ID,
the specific ID relating to Main video or Sub video,
the first program chain information including information which relates to a total number of the one part of cells,
the control information including information which relates to a timing for playback, and
the control information including information which indicates an audio signal coding type,
the information recording method comprising:
recording a new video object on the first area; and
adding new control information to the second area.
4. An information playback system for information playback from an information storage medium according to claim 1 , the information playback system comprising:
a reading unit configured to read the control information; and
an accessing unit configured to access and to play back the video object based on the read control information.