Patent ID: 8107335
Filing Date: 2012-01-31
Classification: G11B

Abstract:
1. A method of optically recording information on an optical disc including first and second recording layers, the method comprising the steps of: performing a focus jump between the first and second recording layers; repetitively generating a random signal as a test signal; shifting a timing of at least one pulse in the repetitively generated random signal; optically recording the repetitively generated random signal on the first recording layer to perform test recording with respect to the first recording layer while the timing of at least one pulse in the repetitively generated random signal is shifted; reproducing the recorded random signal from the first recording layer; evaluating the random signal reproduced from the first recording layer to obtain a first evaluation result; deciding an optimal recording power for recording with respect to the first recording layer on the basis of said obtained first evaluation result; optically recording the repetitively generated random signal on the second recording layer to perform test recording with respect to the second recording layer while the timing of at least one pulse in the repetitively generated random signal is shifted; reproducing the recorded random signal from the second recording layer; evaluating the random signal reproduced from the second recording layer to obtain a second evaluation result; deciding an optimal recording power for recording with respect to the second recording layer on the basis of said obtained second evaluation result; optically recording information on the first recording layer; optically recording information on the second recording layer; and recording, on a management area of the first recording layer, information for identifying an apparatus which made the information recording.