Patent ID: 7218593
Filing Date: 2007-05-15
Classification: G11B

Abstract:
1. A recording strategy generating method for an optical information recording medium on which information relative to a mark and a space, the space being an interval between two marks, is recorded by a PWM modulation method, the mark lasting for a time period nT, where n represents a natural number and T represents a basic clock cycle under recording conditions, and wherein: the space is recorded by irradiating an optical beam at irradiation power Pe; the mark is recorded by irradiating m pulses, each consisting of an optical beam at irradiation power of two levels Pw and Pb, where Pw>Pe>Pb; an average period of the pulse irradiation for every mark is n/m; relations n=n relations n=n a first pulse of the irradiation power Pw rises after elapse of time T a last pulse, which is the m-th pulse of the irradiation power Pb finishes earlier than an end time of the logical mark by time T parameters normalized by the basic clock cycle T, namely, T pre-formatting a piece of information that represents the parameters T reading the information representing the parameters T converting the information representing the parameters T generating the recording strategy for the multi-pulse, wherein periods T wherein: