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Information recording method and information recording/reproducing apparatus

A technology for information recording and recording pulses, applied in optical recording/reproducing/erasing methods, recording signal processing, digital recording/reproducing, etc.

Inactive Publication Date: 2009-06-10
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, when the recording density exceeds about 27GB / layer (channel bit length 69nm), it is difficult to apply the existing recording pulse adjustment method of measuring the phase difference (phase error) between the reproduced signal and the clock signal

Method used

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  • Information recording method and information recording/reproducing apparatus
  • Information recording method and information recording/reproducing apparatus
  • Information recording method and information recording/reproducing apparatus

Examples

Experimental program
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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0033] figure 2 An example of the basic configuration of the information recording device of the present invention is shown. Laser light 102 emitted from a laser diode (laser diode) 101 is converged onto an information recording layer (information recording layer) 111 of an optical disc 110 through an objective lens (objective lens) 103 . Recording or reproduction of information is performed by focused laser light. The laser light reflected by the information recording surface 111 is received by an optical detector (optical detector) 105 . The photodetector outputs a current proportional to the power of the received light. The output current is converted into a regenerative signal by the regenerative signal generation circuit 106 . The optical disk 110 is fixed to the spindle motor 109 and driven to rotate. The spindle motor 109 is driven by a pulse signal, and th...

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Abstract

The invention provides an information recording method and an information recording regenerating device. Even in high-density CD-ROM can be applied based on renewable sources of signal and clock signal of the phase error to adjust the recording pulse parameters. Try to write so that when the channel bit length of user data than the record large. In addition, record user data in the direct application of, or impose the application of the provisions of the revised test was adjusted through the records of pulse parameters.

Description

technical field [0001] The present invention relates to an information recording method and an information recording / reproducing apparatus for recording information by forming marks and mark spaces by irradiating pulse-modulated light on an information recording medium. Background technique [0002] In a recording type optical disc, information is recorded by irradiating laser beams convergingly on the information recording surface of the disc to form marks and mark spaces. Pulse-modulated laser light is used for information recording, and the power and pulse width of recording pulses are adjusted according to the recording characteristics of the medium by performing test writing before recording user data. Usually, trial writing is performed in a trial writing dedicated area provided separately from the user data recording area. The trial writing area is often provided on the inner peripheral side of the user area on the disc like Blu-ray Disc. [0003] Almost all current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0045
CPCG11B7/00458G11B20/10425G11B20/10222G11B20/10481G11B20/10055G11B20/10009G11B2220/2541
Inventor 黑川贵弘
Owner HITACHI LTD
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