Patent ID: 7684676
Filing Date: 2010-03-23
Classification: G11B,H04N

Abstract:
1. A machine readable information recording medium embodied as an 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 video objects and an unrecorded area, the unrecorded area being able to record new video data, the video objects having video object units; one of the video object units containing one begin pack, and the begin pack including profile information on video character relating to the corresponding video object units; a second area including video management information, said video management information including video object information containing time map information, said video management information including a plurality of cell information, a plurality of the cell information representing respective cells, one piece of said cell information including information referring to said video object information, the video management information including original program chain information and user-defined program chain information, the original program chain information designating a fixed reproduction order of one part of the cells, the user-defined program chain information designating a reproduction order of other part of the cells, the fixed reproduction order of said one part of cells being different from the reproduction order of the other part of cells, the original program chain information having program chain general information, a plurality of program information, a plurality of cell information search pointers and many pieces of said cell information, the program chain general information including the number information on programs related to the program information, each of the program information including program type information corresponding to one of the programs, one of the cell information search pointers including start address of one piece of the cell information, and newly created cell information and newly created program information which correspond to said new video data being added to the original program chain information; a third area in which file management information is recorded, the file management information including a file entry and a File Identifier Descriptor, the file entry specifying a location of each of the video file, the file entry including a short allocation descriptor having length information on one of the extents and position information on said one of extents, and the file entry including a descriptor tag which contains “ the File Identifier Descriptor describing a recording location of the file entry related to the File Identifier Descriptor, the File Identifier Descriptor specifying a file name, the File Identifier Descriptor including a descriptor tag which contains “ logical blocks and logical sectors being assigned to the information recording medium, logical sector numbers being assigned to the logical sectors, a length of one of the logical blocks being equal to a length of one of the logical sectors, and logical block numbers being assigned to the logical blocks; and a fourth area in which a logical volume descriptor is recorded, the logical volume descriptor specifying information on a logical volume, the logical sector numbers being assigned to the third area and the fourth area, and the logical block numbers being assigned to the third area and not assigned to the fourth area, wherein AV addresses are defined within the video file, the video management information includes information expressed in the AV addresses, and 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 read video management information.