FIELD: information technology.
SUBSTANCE: recording pulse is generated. The recording pulse includes a combination of a leading pulse and a subsequent intermediate pulse. The level of the leading pulse indicates a first recording power, and the level of the intermediate pulse indicates a second recording power. When an optical disc includes a multiple recording layers, the ratio of the second recording power to the first recording power is determined for each recording layer. When the recording speed is variable, the ratio of the second recording power to the first recording power is determined for each recording speed.
EFFECT: reduced distortion of marks when varying conditions for radiating heat from layer to layer.
26 cl, 11 dwg
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