File-based recordable disc playback apparatus and file-based recordable disc playback method

A file-based recordable disc playback method characterized in comprising:

• a first process step of carrying out a TOC read process in response to a disc playback request from outside, and acquiring track information stored in a disc;
• a second process step of checking to see whether there exists a next session on a basis of the track information acquired in said first process step, when the next session exists, holding a region of a current session from a starting address of the next session, and then searching for TOC data of the next session;
• a third process step of repeating the processes in said first and second process steps until a final session, searching through a final data session after reading of all TOC data is completed, and performing a process of reading a file system;
• a fourth process step of comparing a starting address of each file acquired through the file system read process in said third process step with a region of each session held through the session information holding process in said second process step, and checking to see whether there exists a file in each session;
• and
• a fifth process step of judging whether or not there exists a session without file on a basis of a result of the process of checking to see whether there exists a file in each session in said fourth process step, when judging that there exists a session without file, carrying out a search through a final data track session without file, returning to said third process step to repeatedly carry out the processes in the third and fourth process steps in a same way as that mentioned above, carrying out reading of a file system in a session which is not linked, and, when it is finally judged in said fourth process step that there exists no session without file, ending the sequence of processes.