Patent ID: 7113456

Claim:
A method for playing back a multisession disc in which music data of a CD-DA format is recorded in at least one session and compressed music data of another format is recorded in another session, the method comprising the acts of: searching for a session in which music data of the CD-DA format is recorded; reading the music data in the session from the disc at a speed greater than a normal speed; writing the music data in a shock proof memory; reading the music data from the shock proof memory at the normal speed; suspending reading of the music data from the disc when the amount of music data in the shock proof memory reaches a first set value until the amount of data reaches a second set value; analyzing the record structure of compressed music data recorded in other sessions after writing at least a portion of the music data of the CD-DA format in the shock proof memory; and playing back music in order based on an analysis of the record structure of all the sessions.