Information storage medium and information recording/playback system

An information recording method for recording information on an information recording medium that includes,

• an object recording area for recording an object which has a plurality of object units each including audio/video data, and
• a control information recording area including:
• an audio/video file information table having a first table area for storing a plurality of object stream information, and a second table area for storing audio/video file information configured to manage information of the audio/video data, and
• the audio/video file information including object information which is configured to store information of a recorded unit of audio/video data, and an object information search pointer associated with the object information, wherein,
• when an access frequency to said audio/video data exceeds a predetermined number of times upon sequentially playing back said audio/video data, recording locations of said audio/video data are changed so that the access frequency does not exceed the predetermined number of times,
• the predetermined number of times is represented by N,
• the system transmission rate of an information recording/reproducing apparatus used to play back said audio/video data is represented by STR,
• the physical transmission rate of a pickup head of said information recording/reproducing apparatus is represented by PTR,
• an average seek access time of the pickup head of said information recording/reproducing apparatus is represented by SATa,
• an average jump access time of the pickup head of said information recording/reproducing apparatus is represented by JATa,
• an average rotation wait time of the pickup head of said information recording/reproducing apparatus is represented by MWTa, and
• N is less than or equal to 1/{[1+STR/(PTR−STR)]*(SATa+JATa+MWTa)},
• the information recording method comprising:
• recording the object in the object recording area;
• and
• recording the audio/video file information table, the position information, and time information in the control information recording area.

An information reproducing method for reproducing information on an information recording medium that includes,

• an object recording area including an object which has a plurality of object units each including audio/video data, and
• a control information recording area including:
• an audio/video file information table having a first table area including a plurality of object stream information, and a second table area for storing audio/video file information configured to manage information of the audio/video data, and
• the audio/video file information including object information which is configured to store information of a recorded unit of audio/video data, and an object information search pointer associated with the object information, wherein,
• when an access frequency to said audio/video data exceeds a predetermined number of times upon sequentially playing back said audio/video data, recording locations of said audio/video data are changed so that the access frequency does not exceed the predetermined number of times,
• the predetermined number of times is represented by N,
• the system transmission rate of an information recording/reproducing apparatus used to play back said audio/video data is represented by STR,
• the physical transmission rate of a pickup head of said information recording/reproducing apparatus is represented by PTR,
• an average seek access time of the pickup head of said information recording/reproducing apparatus is represented by SATa,
• an average jump access time of the pickup head of said information recording/reproducing apparatus is represented by JATa,
• an average rotation wait time of the pickup head of said information recording/reproducing apparatus is represented by MWTa, and
• N is less than or equal to 1/{[1+STR/(PTR−STR)]*(SATa+JATa+MWTa)},
• the information reproducing method comprising:
• reproducing a portion of the audio/video data based on at least one of the audio/video file information table, the position information, and the time information.

An information reproducing apparatus for reproducing information on an information recording medium that includes,

• an object recording area including an object which has a plurality of object units each including audio/video data, and
• a control information recording area including:
• an audio/video file information table having a first table area including a plurality of object stream information, and a second table area for storing audio/video file information configured to manage information of the audio/video data, and
• the audio/video file information including object information which is configured to store information of a recorded unit of audio/video data, and an object information search pointer associated with the object information, wherein,
• when an access frequency to said audio/video data exceeds a predetermined number of times upon sequentially playing back said audio/video data, recording locations of said audio/video data are changed so that the access frequency does not exceed the predetermined number of times,
• the predetermined number of times is represented by N,
• the system transmission rate of an information recording/reproducing apparatus used to play back said audio/video data is represented by STR,
• the physical transmission rate of a pickup head of said information recording/reproducing apparatus is represented by PTR,
• an average seek access time of the pickup head of said information recording/reproducing apparatus is represented by SATa,
• an average jump access time of the pickup head of said information recording/reproducing apparatus is represented by JATa,
• an average rotation wait time of the pickup head of said information recording/reproducing apparatus is represented by MWTa, and
• N is less than or equal to 1/{[1+STR/(PTR−STR)]*(SATa+JATa+MWTa)},
• the information reproducing apparatus comprising:
• a reproducer configured to reproduce a portion of the audio/video data based on at least one of the audio/video file information table, the position information, and the time information.