Patent ID: 6359846
Filing Date: 2002-03-19
Classification: G11B

Abstract:
A data recording medium having a plurality of concentric or spiral tracks for recording information represented as marks and spaces between the marks, the marks being formed by emitting to a track recording an optical beam modulated by a plurality of drive pulses where the drive pulse count is adjusted according to a length of a mark part in the original signal to be recorded to the track, said data recording medium comprising:a control data zone for storing control data formed by pits, said control data comprising: at least one of a first pulse movement for modifying a first pulse of said drive pulses, and a last pulse movement for modifying a last pulse of said drive pulses; a temporary power information including at least one of the following: a peak power setting, bias power setting, and asymmetry, said temporary power information indicative of light beam power used for determining at least said first pulse movement TF or last pulse movement TL; and an operational power information including at least one of the following: a peak power setting, bias power setting, and margin constant, said operational power information indicative of light beam power used for recording actual data to the data area.