Patent ID: 7663995
Filing Date: 2010-02-16
Classification: G11B

Abstract:
1. A recording control method of an optical recording medium on which information is recordable by at least irradiation with laser light, the method comprising: test-writing an evaluation pattern for evaluating levels of incidence of thermal interference on the optical recording medium, including altering recording power in a stepwise manner; reading the test-written evaluation pattern to obtain playback signals; binarizing the playback signals and detecting variation amounts of positions of the binarized playback signals relative to reference clocks; and assigning a recording power, including finding a variation amount in advance that corresponds to a pre-specified measured value of a correctable error rate, setting the found variation amount as a threshold value, comparing the detected variation amounts and the threshold value, and assigning the recording power as high as possible at which the detected variation amounts are smaller than the threshold value.