| 摘要 |
PURPOSE:To quickly and surely discriminate two tracks to be subjected to reproduction scanning, by respectively providing track discriminating signal areas in a luminance signal recording area and color difference signal recording area and giving the same number to the guide tracks of the same order. CONSTITUTION:In the outer peripheral section of an optical disk 1 a luminance signal recording area 2 is provided and a color difference signal recording area 4 is provided at the inside of the area 2. The 1st track discriminating signal area 3 is provided in a part of the area 2 the 2nd track discriminating signal area 5 is provided in a part of the area 4. A series of track numbers are separately given to the areas 3 and 5 from the inner peripheral sections to the outer peripheral sections in the order of guide tracks. It is desirable to add codes to the tracks numbers in order to eliminate malfunctions of a track retrieval. Moreover, it is possible to provide a separating area 6 between the areas 2 and 4, to form the 3rd track discriminating area 7 in a part of the area 6, and to give a series of track numbers which has no relation with the track numbers of the areas 3 and 5 to the area 7. It is also possible to provide a separating area 8 having no guide track. |
