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CD device, CD recording method and compact discs

A technology for optical discs and devices, which is applied in the field of recording and reading devices to achieve the effect of protecting legitimate rights and interests

Inactive Publication Date: 2007-11-07
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has problems similar to the method of partially removing the reflective film

Method used

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  • CD device, CD recording method and compact discs
  • CD device, CD recording method and compact discs
  • CD device, CD recording method and compact discs

Examples

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Embodiment Construction

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the necessary drawings.

[0027] FIG. 2 is a flowchart showing an optical disc manufacturing process according to an embodiment of the present invention. In this embodiment, two types of copyright protection information SA and SB are recorded on the mini disc 2 in the disc manufacturing process 1 .

[0028] The two types of copyright protection information SA and SB are used in combination to encrypt and decrypt audio data and the like recorded on the mini disc 2 . The copyright protection information SA and SB correspondingly include such as ID information unique to each minidisc, information on manufacturing factory, production date, control information of permission / not permission of copying operation, and the like.

[0029] As shown in FIG. 3 , in the minidisc 2 , the information recording surface is concentrically divided, wherein an inner area is assigned as a copyright inform...

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PUM

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Abstract

In an optical disk apparatus, bit sequences of information regarding copyright are respectively scrambled using different binary sequences, thereby generating plural lines of signals. The plural lines of signals are further scrambled to generate a single line of drive signal, with which laser beam is modulated.

Description

technical field [0001] The present invention relates to an optical disc device, a method for recording on an optical disc, and an optical disc. The present invention can be applied to such as: mini disc (MD), compact disc (CD), digital video disc (DVD), etc., the present invention Recording and reading equipment are also involved. More specifically, according to the present invention, bit sequences about copyright information are each scrambled by using different binary sequences to generate multi-path signals, and this further scrambles the multi-path signals to generate a single-path drive signal, using this drive signal The laser beam is modulated so that the interests of copyright owners can be protected more effectively than before. Background technique [0002] A minidisc device is a type of optical disc device that has been rapidly popularized in recent years because it can easily reproduce music of different contents without degrading the sound quality. More specif...

Claims

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Application Information

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IPC IPC(8): G11B7/0045G11B20/10G11B7/004G11B7/0055G11B7/007G11B20/00
CPCG11B7/007G11B20/00086G11B20/0021G11B20/00876G11B20/00253
Inventor 小林诚司堀笼俊宏
Owner SONY CORP
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