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Method and apparatus for laser control during recording

A technology of control method and control device, which is applied in the direction of optical recording/reproduction, optical recording/reproduction/erasing method, beam source, etc., can solve the problem of inability to adjust laser power or programming strategy quite accurately, and inability to Ensure the quality of burning and other issues to achieve the effect of ensuring quality

Inactive Publication Date: 2008-06-25
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such methods usually cannot adjust the required laser power or programming strategy very accurately, so the quality of programming cannot be guaranteed

Method used

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  • Method and apparatus for laser control during recording
  • Method and apparatus for laser control during recording
  • Method and apparatus for laser control during recording

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Embodiment Construction

[0051] Please refer to Figure 1 and Figure 2 at the same time. FIG. 1 shows a functional block diagram of an embodiment of an optical disc system 100 of the present invention, and FIG. 2 shows a schematic diagram of a data segment 200 burned onto the optical disc 102 of FIG. 1 . Please note that in some embodiments, the type of the optical disc 102 can be any recordable DVD disc (such as common DVDR or DVDRW) or other types of discs. The process of programming the data segment 200 is described in detail as follows. First, the optical disc system 100 will first burn a piece of normal data (normal data) 210 onto the optical disc 102, and simultaneously detect some specific burning strategy indicators based on the normal data 210 that has been burned to the disc while burning . Please note that the present invention does not limit the type of the programming strategy index. For example, the programming strategy index can be the items listed below (please also refer to FIG. 1): ...

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Abstract

The invention provides a laser control method and apparatus for dynamically adjusting laser power during recording data onto an optical disc, the laser control method comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.

Description

technical field [0001] The present invention relates to a method and device for burning data to a medium, in particular to a laser control method and a device for burning data to an optical storage medium. Background technique [0002] When burning an optical disc, laser control (laser control) is often used to adjust the current burning laser power (laser power) or burning strategy (write strategy), while the existing laser control method uses the previously burned To the data on the disc to adjust the laser power to be burned now or to change the burning strategy. However, such methods usually cannot adjust the required laser power or programming strategy very accurately, and thus cannot ensure the quality of programming. Contents of the invention [0003] The invention provides a laser control method, which is used for dynamically adjusting the burning laser power (laser power) when burning data to an optical disc. The laser control method includes: burning a normal d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/0045G11B7/125G11B7/1263G11B7/1267
CPCG11B7/1267G11B7/1263
Inventor 游志青张鸿祥蔡品再
Owner MEDIATEK INC