Patent ID: 7493026
Filing Date: 2009-02-17
Classification: G11B,H04N

Abstract:
1. An information recording medium being configured to have data that is recorded thereon an reproduced therefrom by an information recording/reproducing apparatus, said information recording medium comprising: a first area in which a video file is recorded, the video file containing a recorded area and an unrecorded area, the recorded area having stored information objects, and the unrecorded area being provided for new video data that will be recorded, the information objects having object units, and the object units containing video data or audio data; and a second area being configured to store a management file, the management file including management information, the management information being used for controlling a selection of the information objects, said 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 respective time map information, said 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 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 the cells designated by the original program chain information being different from the reproduction order of the other part of the cells designated by the user-defined program chain information, the original program chain information designating an original program chain and including program chain general information for the original program chain and one or more pieces of program information designating one or more programs being included in the original program chain, the program chain general information for the original program chain containing a total number of programs, a maximum number of the programs in the original program chain being 99, the user-defined program chain information designating a user-defined program chain and including general information for user-defined program chain, and the program chain general information for the user-defined program chain having a total number of programs in the user-defined program chain being set to 0, wherein the data recorded on the information recording medium is configured to be accessed by the recording/reproducing apparatus, which is configured to open the management file and the video file; read the management file into a memory of the information reproducing apparatus; examine the original program chain information; get the object information included in the management information and finding the time map information in the object information in order to convert a presentation start time and a presentation end time to addresses in the video file; read one of the information objects from the video file and perform initial buffering until some amount of the information object are buffered in a track buffer of the information reproducing apparatus; and decode a part of the information object being buffered in the track buffer.