Method for adjusting gain of tracking error in optical disk device

Abstract

A method for regulating track error gain in optical disc device includes storing stack servo loop gain and track error peak value used recently, searing out required address on optical disc, judging whether determining track error peak value is started up or not and storing said peak value at end point of determination and calculate out revised track error gain as per said peak value if it is, comparing absolute value of revised track error gain with preset one, regulating and revising stored track error gain to be revised track error gain if revised track error gain is less than or equal to preset one.

Description

technical field [0001] The present invention relates to an adjustment method of tracking error gain in an optical disc device. Background technique [0002] In an ordinary optical disk device, in order to minimize the deviation and the difference in reflectance of various optical disks, the focus error signal (hereinafter referred to as FE signal), tracking error signal (hereinafter referred to as TF signal), and center error signal output to the servo system are (hereinafter referred to as CE signal) and beam intensity signal (hereinafter referred to as BS signal) are controlled within a certain range. [0003] Refer below figure 1 , the above-mentioned optical disc device will be described in detail. [0004] figure 1 It is a block diagram of an ordinary optical disc device. [0005] Such as figure 1 As shown, the optical disc device is composed of an optical pickup unit 140 , an RF amplifier unit 160 , a digital signal processing unit 150 , a servo unit 170 , a contr...

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Problems solved by technology

[0018] However, if the ratio of the tracking error gain in the recorded area and the tracking error gain in the unrecorded area is inconsistent with the ratio value stored in the pre-set table, the above method is difficult to provide a corresponding solution, and the tracking servo cannot be stabilized. to run

[0019] Especially when performing additional recording such as linking, after the recording starts and after the recording ends, the tracking servo is disconnected, resulting in the failure of recording or playback.

[0020] In addition, when playing DVD-ROM or CD-ROM, the tracking error gain of the inner circle and the outer circle will also be different. In the existing optical disc player, because only the process of identifying the disc and starting the disc is adjusted, So it is difficult to adjust accordingly for changes in tracking error gain during playback

[0021] As mentioned above, in the existing optical disc device, when searching the recording surface or the unrecorded surface of the optical disc that can be recorded, it is difficult to maintain the gain degree desired by the designer. For the read-only optical disc, the existing optical disc device It is also difficult to adjust accordingly for gain changes that track errors

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