Patent ID: 6549721
Filing Date: 2003-04-15
Classification: G11B,H04N

Abstract:
An information storage medium arranged for recording or playback of at least one video object by a recording or playback apparatus, wherein:the video object is segmented into predetermined video object units, the information storage medium comprises a real time recording video manager, said real time recording video manager includes an AV file information table, said AV file information table includes AV file information, said AV file information comprises at least one video object information for each video object unit, said at least one video object information comprises time map information, each said time map information comprises a description of the playback time of each respective video object unit, a description of the size of each respective video object unit, and a size of a first reference picture of each respective video object unit; said time map information can be used upon accessing or time searching the video object unit; said video object comprises at least one of audio or video information; when an access frequency to the audio or video information exceeds a predetermined number of times upon sequentially playing back a plurality of pieces of audio or video information, recording locations of the plurality of pieces of audio or video information 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 said recording or playback apparatus is represented by STR; the physical transmission rate of a pickup head of said recording or playback apparatus is represented by PTR; an average seek access time of the pickup head of said recording or playback apparatus is represented by SATa; an average jump access time of the pickup head of said recording or playback apparatus is represented by JATa; an average rotation wait time of the pickup head of said recording or playback apparatus is represented by MWTa; and N is less than or equal to 1/{[1+STR/(PTR-STR)]*(SATa+JATa+MWTa)}.