Patent ID: 8363529

Claim:
An optical disc recording device for recording, on an optical disc recorded with first information in the form of a concave-convex mark, second information different from the first information, a recording unit of the concave-convex mark including a plurality of data areas in which the first information is recorded, and a plurality of linking areas, each of which is disposed between the adjacent ones of the data areas, the optical disc recording device comprising: a reproduction signal extractor which extracts a reproduction signal, based on reflected light from the concave-convex mark irradiated with a light beam; a clock reproducer which reproduces a channel clock synchronized with a channel bit length of the concave-convex mark, using the reproduction signal extracted by the reproduction signal extractor; a signal processor which specifies a reproducing position in the concave-convex mark, using the reproduction signal extracted by the reproduction signal extractor, and using the channel clock reproduced by the channel clock reproducer; a recording signal generator which generates a recording signal alternately including a plurality of additionally recordable data, each of which includes the second information and has a predetermined length, and a plurality of dummy data; a recorder which records the second information in synchronism with the concave-convex mark by modulating a light intensity of the light beam in accordance with the recording signal generated by the recording signal generator, and by irradiating the light beam of the modulated light intensity onto the optical disc for changing an optical characteristic of the optical disc; a recording position displacement amount detector which detects a recording position displacement amount representing a displacement amount between the reproducing position and a recording position of the additionally recordable data, using the reproducing position specified by the signal processor, and using the recording signal generated by the recording signal generator; and a dummy data recording length controller which increases or decreases a recording length of the dummy data in accordance with the recording position displacement amount detected by the recording position displacement amount detector.