Separable DRM and CAS Architecture for Content Distribution
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Solution Overview
Problem
Digital rights management (DRM) solutions often complicate content preparation and distribution processes, distracting service providers from their core business and failing to effectively protect content from unauthorized use, leading to reduced revenue for content providers.
Innovation Solution
A system and method that separates digital rights management applications from other authorization applications, allowing a distribution service provider to process content without managing DRM, by receiving audio/video content with a conditional access system (CAS) and DRM applications, performing CAS authorization independently, and re-applying DRM within a trusted domain for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a DRM solution is implemented to protect content, then content protection is improved, but system complexity increases and distracts service providers from core business
Solution Approach 1:
The patent segments the authorization system into two independent parts: CAS (Conditional Access System) for service provider control and DRM (Digital Rights Management) for content provider control. This segmentation allows each system to operate independently, reducing overall system complexity while maintaining both content protection and service management capabilities.
Solution Approach 2:
The patent extracts DRM functionality from the service provider's core authorization system. By separating DRM authentication from CAS authorization, service providers can focus on their core business of content distribution while content providers maintain control over their own DRM policies without interfering with service provider operations.
2Reliability
If DRM is integrated with CAS authorization, then content protection is strengthened, but ease of operation deteriorates as service providers must manage both systems
Solution Approach 1:
The authorization process is segmented into two independent flows: CAS authorization handled by the service provider for service-level access control, and DRM authentication handled by the content provider for content-level protection. This segmentation allows each party to operate their respective system independently, improving ease of operation while maintaining strong content protection.
Solution Approach 2:
The patent implements self-service by allowing content providers to autonomously manage their own DRM authentication without requiring service provider intervention. The CPE performs DRM authentication directly with the content provider's authorization server, enabling content providers to control their own content protection policies without adding operational burden to service providers.
3Device complexity
If a unified authorization system is used for both CAS and DRM, then system complexity is reduced, but adaptability deteriorates as DRM selection becomes restricted
Solution Approach 1:
The patent creates a universal authorization architecture where the CPE can handle both CAS and DRM authorizations through a unified interface, but the underlying authentication mechanisms remain independent and interchangeable. This allows different DRM systems (e.g., Widevine, PlayReady, FairPlay) to be selected and implemented without changing the overall system structure, maintaining both simplicity and adaptability.
Data Source
AI summary
Systems and methods providing content having digital rights management (DRM) applications separable from other authorization applications are provided. A system may include a distribution service provider system in communication with a content provider system and consumer premise equipment (CPE) for the transmission of content from the content provider system to the CPE device. The distribution service provider system may: receive A/V content provided by the content provider system, wherein the A/V content includes a DRM application; apply a conditional access system (CAS) application to the A/V content that is independent of the DRM application; and transmit the A/V content including the CAS and the DRM applications to the CPE for presentation. The CPE device can perform DRM authorizations with the content provider or a third-party DRM provider.