OPTICAL DISC, OPTICAL DISC RECORDING APPARATUS, OPTICAL DISC REPRODUCING APPARATUS, INFORMATION RECORDING METHOD, INFORMATION REPRODCING METHOD, AND INFORMATION RECORDING-REPRODUCING METHOD

摘要

A CONFIGURATION FOR READING OUT DISC MANAGEMENT INFORMATION EASILY WITHOUT ERRORS FROM A DISC IN WHICH RECORDING IS CONDUCTED WITH DATA RECORDING DENSITIES OF A PLURALITY OF KINDS. AN OPTICAL DISC (1) INCLUDES A PLURALITY OF DATA RECORDING AREAS (103; 104) IN WHICH INFORMATION IS RECORDED WITH DATA RECORDING DENSITIES WHICH ARE DIFFERENT FROM EACH OTHER. INFORMATION OF THE DATA RECORDING DENSITIES IN THE DATA RECORDING AREAS (103; 104) IS RECORDED IN A MANAGEMENT INFORMATION RECORDING AREA (A BCA AREA (101) OR A PIC AREA (102)) BY USING A UNIQUE FORMAT WHICH DOES NOT DEPEND UPON THE DATA RECORDING DENSITIES OF THE DATA RECORDING AREAS (103; 104). THE DIVIDED DATA RECORDING AREAS (103; 104) ARE DISPOSED IN THE SAME PLANE OF THE DISC, OR DISPOSED OVER A PLURALITY OF RECORDING LAYERS.