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Method for starting data phase-locked loop when track following and correlation device

A phase-locked loop and data technology, which is applied in the configuration/installation of the head, digital recording/reproduction, etc., can solve the problems affecting the performance of the optical disc device and the long data reading time.

Inactive Publication Date: 2009-07-29
PRINCETON TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the data reading time of the optical disc device in the prior art is too long, which will affect the performance of the optical disc device

Method used

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  • Method for starting data phase-locked loop when track following and correlation device
  • Method for starting data phase-locked loop when track following and correlation device
  • Method for starting data phase-locked loop when track following and correlation device

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Embodiment Construction

[0028] The present invention provides a method for activating a data phase-locked loop during tracking, and judges the status of an optical device based on a radio frequency signal, a radio frequency zero cross signal (RFZC signal), and a tracking signal TRON of an optical device. Whether the read head passes through the data area of ​​the storage medium when tracking. When the read head of the optical device passes through the data area of ​​the storage medium during tracking, a trigger signal is sent to the phase-locked loop of the optical device to adjust the frequency and phase.

[0029] Please refer to image 3 , image 3 It is a schematic diagram of related signals when the optical device reads data in the present invention. exist image 3Among them, T1 to T5 represent data tracks of a storage medium, wherein data track T1 is the starting track of the read head of the optical device, data track T5 is the target track of the read head of the optical device, and data tr...

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Abstract

A method for starting a data phase-locked loop during tracking, which is based on a radio frequency signal, a radio frequency zero-crossing signal, and a tracking signal of an optical device to determine whether a read head of an optical device has stored memory during tracking The data area of ​​the media. When the read head of the optical device passes through the data area of ​​the storage medium when tracking, a trigger signal is sent to the data phase-locked loop of the optical device to adjust the frequency and phase.

Description

technical field [0001] The present invention relates to a method and a related device for starting a data phase-locked loop, in particular to a method and a related device for starting a data phase-locked loop during track-seeking. Background technique [0002] Optical discs with thin body, low cost, and large storage capacity can store a large amount of electronic data, materials, and audio-visual information, and have become one of the most important storage media in the modern information society. No matter what kind of digital optical storage media (digital optical storage), such as compact disk (CD), video compact disc (video compact disc, VCD), or digital media with different specifications such as DVD-R, DVD-RAM, DVD-RW, etc. In a digital versatile disc (DVD), when an optical device (such as an optical disc device) wants to access data, it needs to use an optical pickup head (optical pick-up) to read the data on the disc or to read the data on the disc. The writing o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/09G11B20/10
Inventor 李松鸿王德如
Owner PRINCETON TECH CORP