Information recording medium, information recording/playback method, and information recording/playback apparatus

Abstract

A digital stream signal complying with MPEG-TS is handled as stream object ESOB. The ESOB is recorded in unit of stream object unit ESOBU which includes one or more pack/packet groups. Each pack/packet group has a pack/packet group header at its head position, and stores one or more TS packets after the pack/packet group header.

1 . (canceled)  
   
   
       2 . An information medium comprising one or more data areas configured to store object information, and a management area configured to store management information for managing the object information, wherein 
 one of said data areas is configured to record stream object using a stream object unit in which contained are packet groups each including a packet group header and multiple pairs of packet arrival time information and MPEG transport stream packet,    another one of said data areas is configured to record video object using a video object unit in which contained are a plurality of packs for storing video recording recorded contents, and    the management information to be stored in said management area includes video time map last modification time information describing a time when the content of a time map file for the video object was modified.    
   
   
       3 . A method of recording information on an information medium comprising one or more data areas configured to store object information, and 
 a management area configured to store management information for managing the object information, wherein one of said data areas is configured to record stream object using a stream object unit in which contained are packet groups each including a packet group header and multiple pairs of packet arrival time information and MPEG transport stream packet, another one of said data areas is configured to record video object using a video object unit in which contained are a plurality of packs for storing video recording recorded contents, and the management information to be stored in said management area includes video time map last modification time information describing a time when the content of a time map file for the video object was modified, said method comprising:    recording the stream object or the video object on the data area, and    recording the management information on the management area.    
   
   
       4 . A method of reproducing information from an information medium comprising one or more data areas configured to store object information, and a management area configured to store management information for managing the object information, wherein one of said data areas is configured to record stream object using a stream object unit in which contained are packet groups each including a packet group header and multiple pairs of packet arrival time information and MPEG transport stream packet, another one of said data areas is configured to record video object using a video object unit in which contained are a plurality of packs for storing video recording recorded contents, and the management information to be stored in said management area includes video time map last modification time information describing a time when the content of a time map file for the video object was modified, said method comprising: 
 reproducing the management information from the management area, and    reproducing the stream object or the video object from the data area.    
   
   
       5 . A recording apparatus for recording information on the information medium as defined in  claim 2 , said apparatus comprising: 
 a first recorder configured to record the stream object or the video object on the data area, and    a second recorder configured to record the management information on the management area.    
   
   
       6 . A reproducing apparatus for reproducing information from the information medium as defined in  claim 2 , said apparatus comprising: 
 a first reproducer configured to reproduce the management information from the management area, and    a second reproducer configured to reproduce the stream object or the video object from the data area.