Separation of copy protection rules for digital rights management

a copy protection and digital rights technology, applied in the field of digital rights management, can solve problems such as difficulty for authorized (e.g., licensed) users to use content on different devices on their authorized domains

Inactive Publication Date: 2005-03-31
GENERAL INSTR CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these standards can make it very difficult for an authorized (e.g., licensed) user to use the content on different devices on that user's authorized domain (e.g. home network).

Method used

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  • Separation of copy protection rules for digital rights management
  • Separation of copy protection rules for digital rights management
  • Separation of copy protection rules for digital rights management

Examples

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Embodiment Construction

[0030] The growing interest in streaming distribution of multimedia content over Internet Protocol (IP) networks brings a need for secure delivery of such content to legitimate customers. For purposes of the present disclosure, the term IP Rights Management (IPRM) encompasses conditional access as well as the various issues surrounding persistent access, defined as access to content after the customer has received and decrypted it the first time. Persistent access can be accommodated, for example, by storing the decrypted content on a hard drive provided, e.g., in a Personal Video Recorder (PVR) or Personal Computer (PC). IPRM, which is within the realm of Digital Rights Management (DRM), can be viewed as a generalization of conditional access technology.

[0031] The present disclosure describes Extensible Markup Language (XML) interfaces that are used by external systems in order to use services provided by the IPRM system. These XML documents need to be processed and understood by ...

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PUM

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Abstract

Management of rights to content is provided within an authorized domain. In a single authorized domain, where a plurality of domain interfaces are protected using a common rights management system, a copy of particular content may be allowed to be provided on all devices or only on specific devices coupled to the domain via the interfaces. Copy protection information, for outputs to external devices not protected by the common rights management system, is also specified. Rules can be provided for specifying whether particular content may be copied or moved to another protected domain. A number of rendering devices permitted to render the content simultaneously may be specified. Content rules are provided for use in managing rights to content within an authorized domain. Such rules can be associated with content that is persistently stored by a consumer device, as well as with content that is only rendered by a consumer device.

Description

FIELD OF THE INVENTION [0001] This invention relates to digital rights management (DRM), and more particularly to methods and systems for providing copy protection of digital content within an authorized domain. Such a domain can comprise, for example, a home network that is licensed to play content such as movies, games, music and the like on various different entertainment appliances coupled to the network. BACKGROUND OF THE INVENTION [0002] Providers of digital content, such as music on compact discs (CD) and movies on digital versatile discs (DVD) often desire protection from unauthorized copying of the content. Such content can also be streamed to users via networks such as cable and satellite television plants, as well as over the Internet. Existing copy protection rules, such as those defined by the Society of Motion Picture and Television Engineers (SMPTE), generally do not take into account the existence of authorized domains, where devices (televisions, DVD players, game c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F21/00
CPCG06F21/10H04N21/8355H04N21/43615
Inventor MEDVINSKY, ALEXANDERPETERKA, PETRZHANG, JIANG
Owner GENERAL INSTR CORP
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