Hybrid disc and method for discriminating same

A technology for hybrid discs and optical discs, which is applied in the directions of recording/reproducing by optical methods, optical recording/reproducing/erasing methods, partitioning data areas, etc., can solve the problems of misidentification of hybrid discs as CDs, etc.

Inactive Publication Date: 2004-06-23
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, as described above, in the case where the DVD playback device first detects whether the mounted disc is a CD to avoid damaging the CD in the process of distinguishing the disc type, the DVD playback device reads the CD recording surface B recorded on the hybrid disc. data on a hybrid disc may be misidentified as a CD

Method used

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  • Hybrid disc and method for discriminating same
  • Hybrid disc and method for discriminating same
  • Hybrid disc and method for discriminating same

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Embodiment Construction

[0019] A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. While the subject matter of the invention has been defined and described in detail by way of example of specific embodiments such as detailed flowcharts, the invention can be practiced by one skilled in the art using the description of the invention even without the details. invention. Also, unnecessary detailed descriptions of widely known functions and constructions are omitted herein.

[0020] The hybrid disc according to the preferred embodiment of the present invention has identification information representing the disc type, which is recorded in files such as files, sectors, TOC (Table of Contents), etc. figure 1 In a specific recording area that is not generally used on recording side B of a CD. This identification information is used when a DVD playback device distinguishes disc types.

[0021] figure 2 A block diagram showing a DVD pla...

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Abstract

A DVD (number all-purpose disc) playback apparatus accurately discriminates a hybrid disc, to prevent a recordable CD (compact disc) installed therein from being damaged by a laser beam for a DVD / MMCD. The hybrid disc includes a label printed surface formed on a substrate, a CD recording surface formed below the label printed surface, having identification information expressing a disc type, and a DVD recording surface formed below the CD recording surface. The DVD playback apparatus irradiates a CD laser beam on an optical disk installed therein. If data is readable from the optical disc, it is checked whether the identification information is recorded in the predetermined recording area. The DVD playback apparatus recognizes the optical disc as the hybrid disc, if the identification information is recorded in the predetermined recording area.

Description

technical field [0001] The invention relates to an optical disc playback device, in particular to a hybrid disc and its distinguishing method. Background technique [0002] A digital versatile disc (hereinafter, simply referred to as "DVD") playback device can play back CDs (compact discs) and DVDs. Therefore, the DVD playback apparatus has a function of distinguishing the type of disc loaded therein to set the correct playback mode according to the disc type. [0003] In discriminating the type of the disc, when the disc is loaded, the DVD playback device checks whether the loaded disc is a DVD or a CD, and sets the correct playback mode according to the detected disc type. More specifically, a DVD playback device emits a laser beam for DVD / MMCD (hereinafter, simply referred to as "DVD / MMCD laser beam") having a wavelength of 650 nm to the surface of the disk when the disk is loaded to read the laser beam recorded on it. on the data. At this point, if the data recorded o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/0037G11B7/004G11B7/007G11B7/24035G11B7/24041G11B7/24097G11B19/12
CPCG11B7/00736G11B2007/0013G11B19/12G11B7/24G11B7/0037G11B7/0079G11B7/24038G11B19/122G11B7/24094G11B27/309G11B2220/20
Inventor 吴永南许在薰
Owner SAMSUNG ELECTRONICS CO LTD
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