FIELD: optical disks, method and device for reproducing them, and also device for manufacturing them.
SUBSTANCE: data carrier track is divided on physical segments, N blocks of wobble data of constant length are created in each physical segment, wobble data block is determined to include first block, containing a portion of wobble modulation in part, corresponding to first half, second block, containing a wobble modulation portion in the part, corresponding to the other part, and third block, containing no portions of wobble modulation. Physical segment is determined to have segment types (type 1,2,3), each one of which necessarily includes a third block is certain area and, respectively, includes first, second and a combination of second and first blocks in remaining spaces. In track placement, lower limit number of times M1 is limited, in accordance to which first and second types (type 1, type 2) are serially positioned, and lower limit number of times M2 is limited, in accordance to which second types (type 2) are serially positioned, and first type (type 1) and second type (type 2) are respectively positioned immediately in front of or after the third type (type 3).
EFFECT: less errors when reading address information.
5 cl, 27 dwg
