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Optical reproducing apparatus and method with automatic gain control

A technology of automatic gain control and automatic gain, applied in optical recording/reproduction/erasing methods, optical recording/reproduction, digital recording/reproduction, etc. problems such as reduced capacity

Inactive Publication Date: 2005-10-05
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it takes more time to match the level of the RF signal detected by the optical pickup with the reference level, and it becomes difficult to accurately read the data from the beginning of the data recording area, thereby making the reproduction of the optical reproduction device difficult. Reduced ability

Method used

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  • Optical reproducing apparatus and method with automatic gain control
  • Optical reproducing apparatus and method with automatic gain control
  • Optical reproducing apparatus and method with automatic gain control

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Embodiment Construction

[0028] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0029] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0030] figure 2 The block diagram of Fig. 1 illustrates an optical reproducing apparatus according to an embodiment of the present invention.

[0031] see figure 2 , the optical reproducing apparatus includes an optical disc 100 a , a spindle motor 110 , a pickup 120 , a servo driver 130 , a servo controller 140 , a digital signal processor (DSP) 150 , a main controller 160 and an RF signal processor 200 .

[0032] Such an optical reproducing apparatus for reproducing data from the optical disc 100a may include, for example, a CDP (Compact D...

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Abstract

An optical reproducing apparatus and method, with an automatic gain control therefor. The optical reproducing apparatus may include an optical pickup reading out data from an optical disk, an automatic gain controller operating in one of a first amplification mode and a second amplification mode, and a main controller controlling an amplification mode of the automatic gain controller according to the location of the optical pickup. In the first amplification mode, the automatic gain controller amplifies a gain of a RF signal read out by the optical pickup at a fixed amplification rate for a recoding area of the optical disk, and in the second amplification mode, the automatic gain controller adjusts adaptively an amplification rate according to an input level of the RF signal for a non-recording area of the optical disk.

Description

technical field [0001] Embodiments of the present invention relate to an optical reproducing apparatus and method, and more particularly, to an optical reproducing apparatus capable of improving the capability of reproducing data from an optical disc on which a data recording area and a non-recording area coexist, an automatic gain control apparatus, and a method thereof . Background technique [0002] An optical reproduction and / or recording device reads and / or writes data from / to an optical medium, such as an optical disc, by projecting a laser beam toward a recording area of ​​the optical medium using an optical pickup, and collects light reflected from the optical medium and detect changes in the detected reflectivity. When the optical recording apparatus reads data from an optical disc on which data recording areas and non-recording areas coexist, such as CD-R, CD-RW, DVD±R, DVD±RW, and DVD-RAM, it must The signal output from the optical pickup is maintained to a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/004G11B7/00G11B7/005
CPCG11B7/005G11B20/10009G11B20/10027G11B20/10481G11B20/1833G11B2220/2537G11B7/004
Inventor 元裕灿杨苍镇朴相烈朱泳姙
Owner SAMSUNG ELECTRONICS CO LTD
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