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Information recording method and device, playback device and information protecting method

A technology of an information recording and reproducing device, which is applied to the recording of information on the magnetic disk, the processing of recording signals, and the recording/reproducing by optical methods, etc. question

Inactive Publication Date: 2004-02-25
VICTOR CO OF JAPAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, when recording the user ID to the disk, other problems such as: pressing Figure 9 As shown by the dotted line, by reading the user ID from the disc D through the UI holding device 31, the disc D can be played back with another player, and an illegal duplicate disc D' can be easily produced by duplicating the entire disc D, so that protection of information

Method used

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  • Information recording method and device, playback device and information protecting method
  • Information recording method and device, playback device and information protecting method
  • Information recording method and device, playback device and information protecting method

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Embodiment Construction

[0046] The first embodiment of the information protection device involved in the present invention will be described below with reference to the drawings. In the information protection device of this embodiment, unique inherent information is pre-recorded in each information recording medium, and the content is encrypted using the inherent information.

[0047] figure 1 is a block diagram showing the configuration of the first embodiment of the information protection device of the present invention. Such as figure 1 As shown, the information protection device of this embodiment includes: an input device 100 for inputting content such as moving images, still images, and music; ; an information reproducing device 300 that decodes and reproduces information recorded on an information recording medium; an output device 400 that outputs information such as decoded content.

[0048] Among them, the information recording device 200 includes: a DI reading device 201 for reading t...

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Abstract

Information DI recorded on a disk and which is distinctively characteristic to the individual disk is used to encode contents. When the contents are to be played back, the encoded contents are decoded by the characteristic information DI that is recorded on the disk D. By recording onto the disk D the characteristic disk information DI and identifying information that is distinctive to the particular contents, and then searching from the identifying information for the encoded key using a CI comparison section (210), it is possible to decode and play back the contents of the disk.

Description

technical field [0001] The present invention relates to an information protection device and method for protecting information recorded on a recordable disc, and more particularly to a method for protecting information against unauthorized duplication by recording unique information unique to each disc on the disc. Background technique [0002] In the prior art, in CD-R, PD, DVD-RAM, DVD-RW and other recordable disk media (hereinafter referred to as disks) and devices, transmission is carried out through the network or broadcasting, and the In the case where one-time recording is allowed, content such as moving images, still images, music, etc. of movies must be easily recorded. Furthermore, it is required that the recorded disc can be reproduced by any device as long as it is a legitimate device. [0003] On the other hand, in such recordable disk media and devices, it is necessary to prevent unauthorized copying and protect copyrights. However, it is difficult to achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/14G11BG11B7/00G11B19/04G11B20/00G11B20/10
CPCG11B19/04G11B20/00G11B20/10G06F12/14G11B7/00G11B20/00086G11B20/0021G11B20/00485
Inventor 平田渥美铃木英男宫崎健
Owner VICTOR CO OF JAPAN LTD