Long-distance trace seeking control system and method for optical information regenerating and recording system

A control method and control system technology, applied in optical recording/reproduction, data recording, information storage, etc., can solve problems such as time-consuming, miscalculation and impact of remaining track counts, and avoid track-seeking failure, Avoid heavily distorted effects

Inactive Publication Date: 2011-08-31
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, poor-quality servo signals seriously affect the current long-distance tracking operation, such as servo signals such as tracking error signals.
Bad servo signal will cause wrong calculation of remaining track count and wrong estimation of track jump speed, and may even cause long-distance track seeking operation failure
In addition, when the platform speed is high, the servo signal will be severely distorted; therefore, in order to avoid tracking failure, the platform is set to move at a low speed, resulting in the current long-distance tracking operation taking a lot of time on tracking

Method used

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  • Long-distance trace seeking control system and method for optical information regenerating and recording system
  • Long-distance trace seeking control system and method for optical information regenerating and recording system
  • Long-distance trace seeking control system and method for optical information regenerating and recording system

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Embodiment Construction

[0017] figure 1 A functional block diagram showing an optical information reproduction / recording system according to an embodiment of the present invention. The optical information reproducing / recording system 100 is, for example, a CD-series optical drive, a DVD-series optical drive, a Blu-ray-series optical drive, and the like. like figure 1 As shown, the optical information reproducing / recording system 100 according to the embodiment of the present invention includes: a long tracking controller 110 and an optical head (optical head) 120 . The long tracking controller 110 includes: a track count unit (trackcount unit) 111, a second order observing unit (second order observing unit) 112, a track jump characteristic generation unit (jump profile generator) 113, a gain control unit 114, a lens feedforward A controller (lensfeedforward controller) 115, a lens feedback controller (lens feedback controller) 116, calculation units 117-119 and switches SW1-SW2. The optical head 1...

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Abstract

The invention provides a long-distance trace seeking control system and a long-distance trace seeking control method for an optical information regenerating and recording system. The long-distance trace seeking control method is used in the optical information regenerating and recording system which comprises a lens and a platform. The method comprises: obtaining a pre-estimated speed of the platform, a pre-estimated displacement of the platform, a reference speed of the platform and a first acting force applied onto the platform; according to the pre-estimated speed of the platform, determining to produce the pre-estimated speed of the platform and the pre-estimated displacement of the platform by control of a first open circuit or a first closed circuit; according to the pre-estimated speed of the platform, determining to produce a second acting force to be applied onto the lens by control of a second open circuit or a closed circuit; and pushing the platform and the lens according to the first acting force and the second acting force.

Description

technical field [0001] The invention relates to a long seek control system and method of an optical information reproducing / recording system. Background technique [0002] When reading an optical disc, how to quickly and stably read the data on the disc so as to reduce the data access time is a research topic that various manufacturers are devoting themselves to. There are multiple tracks on the optical disc for storing digital data. [0003] When reading an optical disc, the optical drive will perform the following operations: drive the spindle motor to rotate the disc; move the optical head to the inner circle of the disc; drive the focus servo system (Focus Servo), so that the laser light emitted by the optical head hits the disc On-chip; drive the tracking servo system (Tracking Servo) to move the lens in the optical head so that the laser spot follows a single data track to complete the tracking action; read the track label of this track to know where it is currently ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/085
Inventor 陈宣儒戴诗芃
Owner NOVATEK MICROELECTRONICS CORP
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