Patent ID: 7697821
Filing Date: 2010-04-13
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 an extent, the video file including video objects, 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 unit; a second area in which a management file is recorded, the management file including video management information, said video management information including video object information search pointers and a plurality of video object information, the video object information search pointers corresponding to video object information search pointer numbers respectively, a plurality of the video object information corresponding to the video object information search pointer numbers respectively and including a plurality of time map information, said video management information including a plurality of cell information, a plurality of the cell information representing respective cells, a plurality of said cell information including a plurality of information on the video object information search pointer numbers, the cells referring to a plurality of time maps which relate to a plurality of the time map information, the video management information including original program chain information and user-defined program chain information, 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 original program chain information designating a fixed reproduction order of original cells in the cells, the user-defined program chain information designating a reproduction order of user-defined cells in the cells, a fixed reproduction order of the original cells being different from a reproduction order of the user-defined cells, a first cell of the cells and a second cell of the cells referring to an over-lapped part of one of said video objects, the user-defined program chain information including other pieces of said cell information for the user-defined program chain, another piece of the cell information for the user-defined program chain having movie cell general information, and the movie cell general information containing a presentation start time C_V_S_PTM and a presentation end time C_V_E_PTM of the second cell; 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 (FE) including a short allocation descriptor and information control bock (ICB) tag, the ICB tag specifying a File Type, the short allocation descriptor having length information on the extent and position information on the extent, and the File Identifier Descriptor (FID) including a long allocation descriptor specifying an address relating to the file entry (FE); and a fourth area in which a logical volume descriptor is recorded, the logical volume descriptor specifying information on a 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 the video management information is read and provided to control recording, playing back, or changing the video file by an information recording/reproducing apparatus, the video file is accessed according to the read video management information.