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Recording and/or reproducing apparatus and controlling method thereof

A technology for recording information and signals, applied in optical recording/reproducing/erasing methods, digital recording/reproducing, recording/reproducing by optical methods, etc., and can solve the problem of RF signal not being

Inactive Publication Date: 2003-06-04
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the RF signal is not a suitable reference signal for precise control, especially when high-density and large-capacity optical discs require precise error compensation

Method used

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  • Recording and/or reproducing apparatus and controlling method thereof
  • Recording and/or reproducing apparatus and controlling method thereof
  • Recording and/or reproducing apparatus and controlling method thereof

Examples

Experimental program
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Embodiment Construction

[0035] Embodiments of the present invention will be described below with reference to the drawings.

[0036] Figures 2A to 3B is a schematic diagram of the disc. refer to Figure 2A and 2B , to form spiral or concentric tracks (grooves and lands) on the recording / reproducing layer of the optical disc. exist Figure 3A In , wobble signals are recorded on both sides of each track. exist Figure 3B In , a wobble signal is recorded on one side of each track. A track in which a wobble signal is recorded is called a wobble track. The wobble signal is used for a recording auxiliary clock signal used to obtain synchronization information during recording or reproduction.

[0037] Figure 4 is a cross-sectional view of the disc. refer to Figure 4 , the optical disc is provided with a recording / reproducing layer on which information is recorded. A recording and / or reproducing apparatus forms recording pits on the optical disc or changes a phase by irradiating a laser beam ...

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Abstract

A recording and / or reproducing apparatus and a method of controlling the same. The method of controlling the apparatus for recording information in or reproducing information from a disc having a wobbled track, the method includes detecting a wobble signal recorded in the wobbled track, and removing an error component occurring during the recording or the reproducing, based on the detected wobble signal. Accordingly, errors arising from a variety of factors can be accurately compensated for during a recording or reproducing operation.

Description

technical field [0001] The present invention relates to recording data on and reproducing data from an optical disc, and more particularly to an apparatus for recording data on and reproducing data from an optical disc having a wobbled track, and a control method thereof. Background technique [0002] As the diameter of the laser beam decreases, the recording density of the optical disc increases. In order to reduce the diameter of the laser beam, using a short-wavelength laser source, the numerical aperture of the objective lens of the reading device is increased. When the diameter of the laser beam is reduced, the focus error related to the recording layer greatly affects the deterioration of signal quality. Therefore, most optical disk recording and / reproducing apparatuses have means for compensating for focus errors. [0003] Spherical aberration occurring due to a change in the thickness of the optical disc is proportional to λ / (NA)4. For example, when λ=400nm and NA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/18G11B7/00G11B7/005G11B7/09G11B7/125G11B11/105
CPCG11B11/10595G11B7/0053G11B7/0901G11B11/10502G11B7/0908G11B2007/0013G11B11/10576G11B20/18
Inventor 马炳寅金宽俊朴仁植
Owner SAMSUNG ELECTRONICS CO LTD