Patent ID: 7606468
Filing Date: 2009-10-20
Classification: G11B,H04N

Abstract:
1. A machine readable information recording medium embodied as a recordable optical disc for access by an optical disc drive, the information recording medium 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, 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, wherein the video management information is 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.