Patent ID: 7686523
Filing Date: 2010-03-30
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 store new video data, one of the video objects being distributed in scattered data areas, the video object having video object units, one of the video object units containing one begin pack, the begin pack including profile information on video character relating to the corresponding video object unit, the video object unit including one or more Groups of Picture (GOPs), a playback time of the video object unit being set to more than 0.4 seconds period, and a last video object unit (VOBU) of the video object being able to be set a presentation time period less than 0.4 seconds period; a second area in which a management file is recorded, the management file including video management information, the video management information including original program chain information, and user-defined program chain information, said video management information including a plurality of cell information, a plurality of the cell information representing respective cells, the original program chain information designating a fixed reproduction order of one 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, the user-defined program chain information designating a reproduction order of other part of the cells, the cells referring to a plurality of time maps, the fixed reproduction order of said one part of cells being different from the reproduction order of the other part of cells, and a specific video object unit which has a boundary portion of an erasing area being omitted from a complete deletion in the video object; 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 the video file, the file entry including a short allocation descriptor having length information on one of the extents and position information on an extent, and the File Identifier Descriptor including a long allocation descriptor specifying an address relating to the file entry; and a fourth area in which a logical volume descriptor is recorded, the logical volume descriptor specifying information on the logical volume, 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, logical block numbers being assigned to the logical blocks, 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 and related to the logical block numbers, the video management information includes information expressed in the AV address, and the video management information is read and provided to control recording, playing back, or editing the video file by an information recording/reproduction apparatus, the video file is accessed according to the video management information.