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,
• one 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 the corresponding video object and unit,
• 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 file entry including a short allocation descriptor having length information on said one of extents and position information on an extent,
• logical blocks and logical sectors being assigned on the information recording medium,
• logical sector numbers being assigned to the logical sectors,
• logical block numbers being assigned to the logical blocks,
• a length of each of the logical sectors being 2048 bytes,
• a length of one of the logical blocks being equal to the length of one of the logical sectors,
• AV address being defined in the video file, and
• a unit length of said AV address being 2048 bytes,
• 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 to 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,
• one 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 the corresponding video object unit,
• 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 file entry including a short allocation descriptor having length information on said one of extents and position information on an extent,
• logical blocks and logical sectors being assigned on the information recording medium,
• logical sector numbers being assigned to the logical sectors,
• logical block numbers being assigned to the logical blocks,
• a length of each of the logical sectors being 2048 bytes,
• a length of one of the logical blocks being equal to the length of one of the logical sectors,
• AV address being defined in the video file, and
• a unit length of said AV address being 2048 bytes,
• 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,
• one 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 the corresponding video object unit,
• 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 file entry including a short allocation descriptor having length information on said one of extents and position information on an extent,
• logical blocks and logical sectors being assigned on the information recording medium,
• logical sector numbers being assigned to the logical sectors,
• logical block numbers being assigned to the logical blocks,
• a length of each of the logical sectors being 2048 bytes,
• a length of one of the logical blocks being equal to the length of one of the logical sectors,
• AV address being defined in the video file, and
• a unit length of said AV address being 2048 bytes.
• 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.