Patent ID: 7962006
Filing Date: 2011-06-14
Classification: G11B,H04N

Abstract:
1. An information recording medium embodied as an optical disc comprising: a first area being configured to store a video file or an audio file, the video file or the audio file including a plurality of extents, one of said extents corresponding to a block, the video file including an unrecorded area and an object, the unrecorded area being managed as at least the extents, the object having object units, each of the object units containing video packs, audio packs and one begin pack, each of the video packs and the audio packs having predetermined size, and each said begin pack including recording time information of each of the object units respectively; a second area being configured to store a management file, 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 representing a presentation period within the object, the video file, the management file and a backup file being disposed under a rewritable video title set directory as a common subdirectory; and a third area being configured to store file management information, the file management information including a file entry (FE), the file entry specifying a location of the video file or the audio file, the file entry including a short allocation descriptor having length information of the extent and position information of the extent, logical blocks and logical sectors being assigned on the medium, length of the logical block being equal to length of the logical sector, the logical sectors being assigned logical sector numbers, capacity of each of the sectors being 2048 bytes, addresses for the logical blocks being added to logical block numbers in the video file, position information of the extent in the allocation descriptor being designated by the logical block number of the logical block, and a logical volume descriptor included in a file system, describing contents of a logical volume, and logical sector numbers being assigned to area of the logical volume descriptor but logical block numbers being not assigned, 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.