Optical recording medium, method and apparatus for recording data thereon

Abstract

PURPOSE: A device for recording data on an optical recording medium is provided to set a low level of a recording power of a recording pattern to be higher than a bias power level, in order to sufficiently absorb heat on a recording film even when data is recorded at high speed, thereby improving edge characteristics of a recording mark. CONSTITUTION: A pickup unit(1) comprises as follows. A motor(11) rotates an optical disk(200). An optical head(13) irradiates a laser light on the optical disk(200), or receives the laser light reflected from the optical disk(200). A servo circuit(12) servos the motor(11) and the optical head(13). A laser driving circuit(14) drives a laser installed on the optical head(13). A channel modulator(3) modulates inputted data into channel bit strings, and outputs NRZI(Non Return to Zero Inverted) data. A recording waveform generation circuit(2) generates a recording waveform for recording the NRZI data, and supplies the recording waveform to the laser driving circuit(14). The laser driving circuit(14) controls the laser by using the recording waveform, and forms a mark or a space on the optical disk(200).

Description

technical field [0001] The present invention relates to recording data on an optical recording medium, and more particularly to an optical recording medium storing information related to a write strategy for high-speed recording, and an optical recording medium for recording data on the optical recording medium. Methods and apparatus on the medium. Background technique [0002] When data is recorded on the optical recording medium, marks are formed in the tracks of the optical disc. In read-only discs such as compact disc read-only memory (CD-ROM) and digital versatile disc-read-only memory (DVD-ROM), marks are formed as pits. In recordable discs such as Compact Disc - Recordable / Rewritable (CD-R / RW) and Digital Versatile Disc - Recordable / Rewritable / Random Access Memory (DVD-R / RW / RAM), The recording layer is coated with a phase change layer that enters a crystalline or amorphous state in response to temperature changes, and marks are formed from changes in the phase of th...

AI Technical Summary

Problems solved by technology

As a result, the distortion of the shape of the mark becomes more severe

[0007] In other words, since erasing is performed using erasing power having a predetermined DC level during data recording, recording / noise such as a carrier-to-noise (C / N) signal is caused due to thermal interference between a plurality of recording pulses. The reproduction signal is reduced, and marks are formed incompletely and then crystallized, causing a reduction in reproduction characteristics

Specifically, when data recording is performed at high speed to increase the data transfer speed, the distortion of the recording / reproducing signal significantly increases

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