Patent ID: 7426335
Filing Date: 2008-09-16
Classification: G11B,H04N

Abstract:
1. A machine readable information recording medium embodied as a recordable optical disc for access by an optical disc drive comprising: 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 predetermined size, and said begin pack including recording time information on a corresponding video object unit; and 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 representing a cell, the cell referring to a whole or a part of the video object, and the video file, the management file and a back up 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 one of allocation descriptors having length information on one of the extents and position information on an extent, logical blocks and logical sectors being assigned on the information recording medium, the logical sectors being assigned logical sector numbers, and the logical blocks being assigned logical block numbers, the position information on the extent in the allocation descriptors being designated by the logical block number, and a logical volume descriptor included in the file management information, the logical volume descriptor relating to the logical volume, one of the logical sector numbers being assigned to an area being configured to store the Logical volume descriptor, and the logical block numbers being not assigned to the area, wherein the video management information is read and provided to control recording, playing back, or editing the video file by an information recording/reproducing apparatus, the video file is accessed according to the video management information.