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Optical disc recording device and its method

A recording method and optical disc technology, applied in optical recording/reproduction/erasing methods, optical recording systems, recording/reproduction with optical methods, etc., can solve the problems of reading and writing head maintenance, and achieve the effect of preventing damage

Inactive Publication Date: 2007-10-03
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned earlier, the reason for these deviations is that the servo device controlling the head cannot maintain the head with a radial deviation (run-out) when it encounters a defect in the optical disc and cannot obtain the correct track information. on the track of change

Method used

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  • Optical disc recording device and its method
  • Optical disc recording device and its method
  • Optical disc recording device and its method

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Embodiment Construction

[0019] During the reading / writing process of an optical disc, when encountering a defect of a certain length in the optical disc, the read / write head may deviate from the target track. Even rails can appear when this defect is very long. The so-called sliding track means that the read-write head deviates from the target track and enters a wrong track. According to an embodiment of the present invention, especially when writing data to an optical disc, once the length of the defect is found to exceed a predetermined critical value, the huge writing power of the read-write head will be cut off or converted to a smaller reading power . After the write operation is interrupted, the defect will be handled appropriately, and the write operation can be resumed from a location determined by the defect management function.

[0020] The defect length threshold is used as a reference to determine whether the write operation should be interrupted, and can be predetermined in any suitabl...

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Abstract

A method and device for protecting an optical disc from being damaged when a defect is encountered during recording. According to the present invention, when a defect is encountered during recording, the length of the defect is measured. The recording is stopped when the length of the defect exceeds a threshold. After the defect has been passed, the recording can be resumed.

Description

technical field [0001] The present invention relates to optical disc recording, in particular to an optical disc recording device and its method, in order to prevent the optical disc from being damaged during the recording process, for example, due to the relatively long defect of the optical disc, the phenomenon of abnormal sliding of the read-write head is caused. damage. Background technique [0002] With the increasing popularity of multimedia applications, large-capacity optical discs have become extremely necessary. In order to increase storage capacity, some high-density optical discs have been developed, such as Blu-ray discs (Blu-ray disc, BD) and high-density digital laser discs (HD DVD). The track pitch of high-density optical discs is reduced to half or even one-fifth of that of traditional CD and DVD discs. For example, the track pitches of conventional CD and DVD discs are 1.6 microns and 0.74 microns, respectively, while the track pitches of Blu-ray and HDDL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0045G11B7/004
CPCG11B7/0948G11B7/0045G11B19/04G11B19/041
Inventor 陈志远
Owner MEDIATEK INC
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