Information recording medium and system controller

An information reproduction apparatus for reproducing real-time data from an information recording medium comprising a volume space for at least appending in sectors a file comprising data and file management information for managing the file,

• wherein:
• the real-time data comprises at least one of video data and audio data;
• the real-time data is recorded in at least one real-time extent each of which is allocated with logically contiguous sectors within the volume space;
• a linking loss extent for recording invalid data is positioned before each of the at least one real-time extent;
• and
• the at least one real-time extent comprises a linking gap, wherein the linking gap is a region which overwrites an already-recorded area through appending,
• wherein the information reproduction apparatus comprises:
• a file structure processing section for determining whether or not the file recorded on the information recording medium is a real-time file containing the real-time data;
• and
• a data reproducer for performing a reproduction operation for the real-time data recorded in the at least one real-time extent, the reproduction operation being continuously performed without performing a recovery process even if a reproduction error due to invalid data recorded in the linking gap occurs.