Information recording method, information recording medium, and information reproducing method, wherein information is stored on a data recording portion and a management information recording portion

An information reproducing method for reproducing information from an information recording medium,

• the information recording medium having
• a first area in which a video file is recorded,
• the video file including a plurality of extents,
• the video file including an unrecorded area and a video object,
• the unrecorded area being able to store new video data,
• the unrecorded area being managed as at least one of the extents,
• the video object having video object units,
• each of the video object units containing video packs, audio packs, and one begin pack,
• each of the video packs and the audio packs having a predetermined size, and
• said begin pack including recording time information on each of the video object units respectively,
• a second area in which a management file is recorded,
• the management file including video management information, the video management information having program chain information,
• the program chain information containing cell information,
• the cell information describing a presentation period within the video object, and
• the video file, the management file and a backup file being store under a DVD-RTR directory, and
• a third area in which file management information is recorded,
• the file management information including a file entry (FE), and a file identifier descriptor (FID),
• the file entry specifying a location of the video file,
• the unrecorded area in the video file being changed to a recorded area, when the new video data is additionally recorded in the unrecorded area,
• the file entry including a short allocation descriptor having length information on the one of extents and position information of an extent,
• an unallocated area on the information recording medium being described by a space table,
• the space table including an unallocated space entry, and
• the unallocated space entry including byte number information indicating a length of an allocation descriptor train,
• the information reproducing method comprising:
• reading the video management information;
• and
• accessing the video file and reproducing data included in the video file.

An information recording method for recording information on an information recording medium,

• the information recording medium having
• a first area in which a video file is recorded,
• the video file including a plurality of extents,
• the video file including an unrecorded area and a video object, the unrecorded area being able to store new video data,
• the unrecorded area being managed as at least one of the extents,
• the video object having video object units,
• each of the video object units containing video packs, audio packs, and one begin pack,
• each of the video packs and the audio packs having a predetermined size, and
• said begin pack including recording time information on each of the video object units respectively;
• a second area in which a management file is recorded,
• the management file including video management information, the video management information having program chain information,
• the program chain information containing cell information,
• the cell information describing a presentation period within the video object, and
• the video file, the management file and a backup file being stored under a DVD-RTR directory;
• and
• a third area in which file management information is recorded,
• the file management information including a file entry (FE), and a file identifier descriptor (FID),
• the file entry specifying a location of the video file,
• the unrecorded area in the video file being changed to a recorded area, when the new video data is additionally recorded in the unrecorded area,
• the file entry including a short allocation descriptor having length information on the one of extents and position information of an extent,
• an unallocated area on the information recording medium being described by a space table,
• the space table including an unallocated space entry, and
• the unallocated space entry including byte number information indicating a length of an allocation descriptor train,
• the information recording method comprising:
• generating the new video data;
• recording the new video data into the video file;
• and
• changing the video management information.

An information reproducing apparatus for reproducing information from an information recording medium,

• the information recording medium having
• a first area in which a video file is recorded,
• the video file including a plurality of extents,
• the video file including an unrecorded area and a video object,
• the unrecorded area being able to store new video data,
• the unrecorded area being managed as at least one of the extents,
• the video object having video object units,
• each of the video object units containing video packs, audio packs, and one begin pack,
• each of the video packs and the audio packs having a predetermined size, and
• said begin pack including recording time information on each of the video object units respectively,
• a second area in which a management file is recorded,
• the management file including video management information, the video management information having program chain information,
• the program chain information containing cell information,
• the cell information describing a presentation period within the video object, and
• the video file, the management file and a backup file being stored under a DVD-RTR directory, and
• a third area in which file management information is recorded,
• the file management information including a file entry (FE), and a file identifier descriptor (FID),
• the file entry specifying a location of the video file,
• the unrecorded area in the video file being changed to a recorded area, when the new video data is additionally recorded in the unrecorded area,
• the file entry including a short allocation descriptor having length information on the one of extents and position information of an extent,
• an unallocated area on the information recording medium being described by a space table,
• the space table including an unallocated space entry, and
• the unallocated space entry including byte number information indicating a length of an allocation descriptor train,
• the information reproducing apparatus comprising:
• a reading unit configured to read the video management information;
• and
• an accessing unit configured to access the video file and to reproduce data included in the video file.