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Optical storage device discrimination method

A discrimination method and optical storage technology, which are applied in the recording/reproducing, information storage, recording information storage and other directions by optical methods, which can solve the problems of device damage, difficult to control the time spent, and large time cost.

Inactive Publication Date: 2003-03-26
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it is necessary to read the data to know whether the previous assumption is correct, and the light source switching, focusing, orbit determination and other operations must be performed before reading the data, it will take a huge time cost when the assumption is wrong to reset
In addition, the time it takes to distinguish the type of optical storage device in this way is very difficult to control, and the degree of variability is extremely large.
Therefore, the user may even mistakenly think that the device is damaged or the system is down due to the large change in the operation time of the optical reading device when it recognizes the optical storage device.

Method used

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Embodiment Construction

[0021] In order for those skilled in the art to easily understand the spirit of the present invention, the data storage format and reading method of the optical storage device are briefly explained here. Please refer to figure 1 , which shows a schematic diagram of a data storage format and a reading method taking a compact disc (CD) as an example. In the CD, the data is burned in the CD after conversion of the 8-14 encoding format (Eight to Fourteen Modulation, EFM), and is formed in the CD as figure 1 A track is composed of pits such as a1, a3 and a5, and non-pit lands such as a2 and a4. When a CD is to be read, the data represented by the combination of pits and non-pits must be read after operations such as turning on the light source, rotating the CD, focusing, and tracking.

[0022] When reading data, a light source shines on the track and is reflected to the pick-up head. Since pits are recessed grooves compared to non-pits, the brightness of reflected light at diffe...

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Abstract

With the light source being focused, one preset range of the optical storage device is read again in order to take multiple data transition-points. Then, in these data transition points, the adjacent two transition-points with longest transition interval are selected. The category of the optical storage device is determined based on the size of the longest transition interval.

Description

technical field [0001] The present invention relates to a method for discriminating optical storage devices, more specifically, to a method for discriminating optical storage devices with different storage formats based on the physical characteristics of the data storage formats of the optical storage devices. Background technique [0002] With the multi-faceted development of science and technology, there are often innovations in optical storage devices. Judging from the current products on the market, optical storage devices can be roughly divided into two categories: multifunctional digital video disc (DVD) and compact disc (CD). Since these two types of optical storage devices are widely used in the market at the same time, many manufacturers have begun to develop and manufacture optical reading devices that can simultaneously read different types of optical storage devices for the convenience of users. However, since these two types of optical storage devices are diffe...

Claims

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Application Information

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IPC IPC(8): G11B7/00G11B19/02G11B19/12
Inventor 湛一中
Owner VIA TECH INC
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