Patent ID: 8089844
Filing Date: 2012-01-03
Classification: G11B

Abstract:
1. An optical recording method for directing a recording pulse train to an optical disc medium to form marks and spaces thereon and for recording information as information about edge positions of the marks and the spaces between the marks, the recording pulse train having been created by modulating laser light into plural power levels, the method comprising: coding to-be-recorded data into coded data consisting of a combination of the marks and the spaces; shifting a position of the second pulse edge counted from a starting edge of the recording pulse train for forming the marks and the spaces, to adjust the recording pulse train; and directing the recording pulse train to the optical disc medium to form the marks and the spaces thereon, wherein the recording pulse train for forming the marks and the spaces includes five or more pulse edges, wherein the method further comprising classifying each of the marks within the coded data on the basis of its mark length and a space length of a preceding space and/or a succeeding space, wherein in the course of the step of adjusting the recording pulse train, shifting a position of the second occurrence edge counted from the starting edge of the recording pulse train for forming the marks and the spaces, depending on the result of the classification, and shifting a position of the third falling edge counted from the ending edge of the recording pulse train for forming the marks and the spaces, depending on the result of the classification.