Patent ID: 7085201

Claim:
An optical disc drive which can record or reproduce data including audio data and non-audio data onto or from an optical disc when the optical disc is loaded into the optical disc drive, the optical disc being a multi-session optical disc including multiple sessions, each session having a lead-in area in which TOC information is recorded, a data area including at least one tracks in which either audio data or non-audio data is recorded, and a lead-out area, the optical disc drive comprising: an optical pick-up moveable in a radial direction of the loaded optical disc to record or reproduce the data onto or from the loaded optical disc; TOC information acquiring means for sequentially acquiring the TOC information recorded in the lead-in areas of the multiple sessions in the loaded optical disc by means of the optical pick-up; TOC information judging means for judging whether or not there is illegal TOC information in the TOC information acquired by the TOC information acquiring means; track information acquiring means for acquiring track information of the at least one tracks recorded in the session(s) that have been acquired by the TOC information acquiring means before the session including the illegal TOC information in the case where the TOC information judging means judges that there is the illegal TOC information in the acquired TOC information; non-audio track judging means for sequentially judging whether or not there is a non-audio track in the at least one trucks acquired by the track information acquiring means, the non-audio data being recorded in the non-audio track; and session invalidating means for invalidating all sessions on and after the session including the non-audio track in the case where the non-audio track judging means judges that there is the non-audio track in the acquired tracks.