Patent ID: 7415197

Claim:
A machine readable information recording medium embodied as a recordable optical disc for access by an optical disc drive 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 the video-object, the unrecorded area being able to store new video data, the video object having video object units, one of the video object units containing video packs, audio packs and one begin pack, each of the video packs and the audio packs having predetermined size, and said begin pack including recording time information on the corresponding video object unit; a second area in which a management file is recorded, the management file including video management information, the video management information being used for controlling the video object, said video management information including object information search pointers and a plurality of object information, the object information search pointers corresponding to object information search pointer numbers respectively, a plurality of the object information corresponding to the 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 object information search pointer numbers, the cells referring to a plurality of the time map information, the video management information including original program chain information representing an original program chain, the original program chain information having program chain general information for the original program chain, a plurality of program information, a plurality of cell information search pointers and many pieces of cell information, the program chain general information including number information on programs related to the program information, each of the program information including program type information corresponding to one of the programs, and one of the cell information search pointers including start address of one piece of the related cell information, and a third area in which file management information is recorded, the file management information including a file entry (FE), a File Identifier Descriptor (FID), and a space bit map, the file entry specifying a location of the video file, the file entry including allocation descriptors having length information on one of the extents and position information on one of the extents, an unallocated area being described by the space bit map, and the space bit map being recorded as a space bit map descriptor which specifies a bit for every logical blocks, wherein 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 video management information.