Method of identifying optical disc

A technology of optical discs and optical heads, which is applied in optical recording/reproduction, information recording on magnetic discs, systems characterized by carrier structures, etc. It can solve problems such as difficult to accurately identify the type of optical disc, and achieve the effect of improving performance

Inactive Publication Date: 2008-09-03
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In order to overcome the technical problem that it is difficult to accurately identify the type of optical disc in the prior art, the present invention provides a method for identifying optical discs

Method used

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  • Method of identifying optical disc
  • Method of identifying optical disc

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Embodiment Construction

[0022] Certain terms are used in the present description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned in each claim in the specification and claims is an open term and should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0023] The present invention provides an optical disc...

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Abstract

A method of identifying an optical disc is disclosed. The method includes enabling an optical pick-up unit to emit a first laser beam having a first wavelength to the optical disc; controlling the optical pick-up unit to move a focus point of the first laser beam in a direction of thickness of the optical disc; obtaining a first focus error (FE) signal corresponding to the first laser beam; counting a first s-curve number corresponding to s-curve occurring in the first FE signal; and identifying the optical disc according to the first s-curve number. Compared with the prior art, the invention provides a flexible realizing method capable of accurately identifying disk types, further improving the efficiency of the driving operation.

Description

technical field [0001] The present invention relates to a mechanism for accessing optical discs, in particular a method for identifying loaded optical discs. Background technique [0002] Digital Versatile Disc (DVD) is a well-known optical disc for storing digital images. Due to the widespread use of DVD, it is widely used and becomes the mainstream medium for storing and transmitting multimedia content. In recent years, depending on the demand for storing high-quality video / audio information in a single optical disc, the optical disc technology has also been continuously developed, resulting in a larger capacity of the optical disc than previously released optical discs. For example, in order to meet the needs of users, a new generation of high-definition digital versatile disc (High-Definition DVD, hereinafter referred to as HD-DVD) has been developed in optical disc technology. However, according to the specifications of DVD discs and HD-DVD discs, the substrate thickne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B19/12
CPCG11B19/127G11B2007/0013G11B2007/0006G11B7/1275
Inventor 李勇志黄钲棋
Owner MEDIATEK INC
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