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Recording medium driving apparatus and method

A technology for recording media and driving devices, applied in optical recording/reproduction/erasing methods, magnetic recording, data recording, etc., capable of solving problems such as difficulty in maintaining the bottom of the traverse signal, difficulty in maintaining the traverse signal, etc.

Inactive Publication Date: 2003-08-13
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And if the time constant is too small, it will be difficult to maintain the bottom of the traverse signal, although the voltage across the capacitor will follow changes in the traverse signal at low frequency
[0016] Thus, it is very difficult to quickly acquire an accurate image signal while maintaining the bottom of the traverse signal with high accuracy just by changing the time constant

Method used

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  • Recording medium driving apparatus and method
  • Recording medium driving apparatus and method
  • Recording medium driving apparatus and method

Examples

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Embodiment Construction

[0041] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] FIG. 1 is a block diagram showing an embodiment of an optical disk device applicable to the present invention. must be pointed out with Figure 8 The same parts as in the Figure 8 The same reference numerals are used for corresponding parts and their explanations are omitted for simplicity.

[0043] The playback signal provided by the optical pickup 3 is sent to the defect detection circuit 11, that is, the aforementioned defect detection device. The defect detection circuit 11 detects a defect occurring in the playback signal, and at the same time outputs a defect signal indicating the detection result to the hold voltage reset circuit 12 .

[0044] The operation of the defect detection circuit 11 is explained as follows. For example, if there is a scratch in the optical disc 1, it will reduce the reflection ability of the sc...

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Abstract

The invention relates to a method for recording a medium drive device including being able to acquire a mirror image signal with high accuracy when reading the signal from a scuffing part of a CD; providing a maintenance circuit after separating the low frequency component for a cross sliding signal and a replay signal from a replay signal in an crossing sliding signal identifying unit; maintaining the bottom part of the cross sliding signal in the maintenance circuit so as to generate a bottom end maintenance signal; simultaneously detecting a defect if having in the replay signal in a defect detecting circuit; if the defect is detected, the defect detecting circuit outputs a defect signal with a high level to a maintenance voltage offset circuit. The maintenance voltage offset circuit discharges a capacitance in the maintenance circuit. The operation of maintaining the bottom part of the cross sliding signal is stopped when a provided defect signal is arranged in a high level period.

Description

technical field [0001] The present invention generally relates to a recording medium driving device and a recording medium driving method. More particularly, the present invention relates to a recording medium driving apparatus and a recording medium driving method used in an optical disk apparatus for recording and playing back information to and from a typical optical disk. to access the desired track. Background technique [0002] In the operation of playing back information from an optical disc, for example, a mirror image signal is generated from a reproduction signal to achieve, for example, counting the number of tracks traversed by light emitted by an optical pickup and performing the introduction of a tracking servo mechanism (pull- in) operation. [0003] Fig. 6A is a diagram showing a section of an optical disc, that is, a cross-sectional view obtained by cutting the optical disc along a straight line in the radial direction of the disc through the center of the...

Claims

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Application Information

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IPC IPC(8): G11B21/08G11B7/00G11B7/004G11B7/085G11B7/09
CPCG11B7/08541G11B7/0948G11B7/08529G11B2220/2537
Inventor 驹崎隆裕筒井敬一
Owner SONY CORP
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