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Method for recording/accessing mumber management data and related apparatus

A technique for managing data, numbers, applied in the field of computer programs

Inactive Publication Date: 2008-07-09
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A related question is how the drive can detect at mount time that the disc contains DRM data

Method used

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  • Method for recording/accessing mumber management data and related apparatus
  • Method for recording/accessing mumber management data and related apparatus
  • Method for recording/accessing mumber management data and related apparatus

Examples

Experimental program
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Embodiment Construction

[0044] figure 1 A block diagram of a reproduction device according to the present invention is shown. For reading user data from the disc 1, a reading unit 2 is provided. However, some or all of the user data may be subject to usage restrictions defined within a digital rights management (DRM) system agreed upon by the content provider and consumer. This means that the content stored on disc 1 may be encrypted and must be decrypted before it can be played back by the user. Thus, an encryption key may for example be stored in a specific area on the disc. Furthermore, usage rights can be stored on disc 1, eg indicating whether the user is allowed to copy the content. Such usage rights and keys will be referred to as DRM data hereinafter. For reading such DRM data, a corresponding DRM reading unit 3 is provided. In order to discover access to the DRM data, one or more pointers must be discovered and evaluated by the evaluation unit 4 before the DRM data can actually be read....

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PUM

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Abstract

Disclosed is a record carrier, in particular a recordable or rewritable optical disc, having a program memory area for storing administrative data, a lead in area, a program area for storing user data and a lead out area. In order to enable a drive to access digital rights management data which are stored in the program area, comprising e.g. usage rights and cryptographic keys, it is proposed that the record carrier further comprises:-a DRM pointer entry (ALP) comprising the entry point for said digital rights management data is stored in the program area after said digital rights management (DRM) data, -a drive-readable entry comprising an information allowing the drive to find said DRM pointer entry (ALP) and to access said digital rights management (DRM) data is stored in said program area or said program memory area.

Description

technical field [0001] The invention relates to a record carrier having a program storage area for storing management data, a lead-in area, a program area for storing user data and a lead-out area. The invention also relates to a method of accessing digital rights management data stored in a program area of ​​such a record carrier, a method of recording digital rights management data on such a record carrier, a corresponding drive and recording device and A computer program for implementing the method. Background technique [0002] According to the Adaptation Layer specification implementing a security system for read-only and rewritable optical discs, digital rights management data is located in the lead-in area of ​​the disc volume. The entry point for Digital Rights Management (DRM) data is contained within the DRM pointer entry, specifically within the Adaptation Layer Parameter Space (ALP). It lists the physical locations of all copies of key lockers, which are struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/00G11B27/32G06F1/00G11B20/12G06F21/10G11B20/10
CPCG11B20/00086G11B20/1217G11B20/0021G11B20/00731G06F21/10G11B20/00369G11B20/00253G11B20/10G11B7/007
Inventor W·F·J·芳蒂恩P·H·C·本特维森G·J·肖尔
Owner KONINK PHILIPS ELECTRONICS NV