Optical recording control method, optical recording control circuit, optical reproduction control method, optical reproduction control circuit, optical recording medium, tracking control method, tracking control circuit, optical recording method, optical recording apparatus, optical reproduction method, and optical reproduction apparatus

摘要

An object of the invention is to increase a transfer rate in data recording or data reproduction. A beam spot 10 is cyclically moved in a track set with a predetermined pattern. The track set is constituted of adjacent tracks of a predetermined number. In recording, the power of a laser beam is impulsively controlled with a predetermined intensity when the beam spot 10 crosses the middle of each of tracks 11, 12, and 13 to record data in the track set constituted of the tracks 11, 12, and 13. In reproduction, the data recorded in the track set constituted of the tracks 11, 12, and 13 is reproduced by sampling a reproduction signal to be generated in receiving reflected light of the light beam when the beam spot 10 crosses the middle of each of the tracks 11, 12, and 13.