ATSC 3.0 Receiver EMM Acquisition via Scheduled Broadcast Intervals
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Solution Overview
Problem
In ATSC 3.0 terrestrial broadcast systems, there is a need for an efficient method to deliver Entitlement Management Messages (EMMs) to receivers, as users may not always be connected to the internet, and not all receivers are continuously tuned to the broadcast signal, leading to potential loss of access to protected content.
Innovation Solution
A reception apparatus with processing circuitry that extracts data packets containing rights information from the broadcast signal, determines entitlement reception opportunities based on the receiver's identification, and configures the receiver to receive the broadcast signal during designated entitlement reception periods to acquire EMMs, ensuring access to protected content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EMMs are delivered over broadband network, then receivers can acquire rights information when connected to Internet, but access is lost when network connection is unavailable or password is changed
Solution Approach 1:
The broadcast signal serves as an intermediary delivery mechanism for EMMs, allowing receivers to acquire rights information through the broadcast channel rather than directly through broadband network. This mediator approach provides an alternative path that doesn't depend on Internet connection or network credentials.
Solution Approach 2:
EMMs are delivered in advance through the broadcast signal during entitlement reception periods, allowing receivers to obtain rights information before needing to access protected content. This preliminary delivery ensures receivers have necessary credentials even when broadband connection is unavailable at the moment of content access.
2Reliability
If receivers are continuously tuned to broadcast signal, then EMMs can be received reliably, but resource usage increases and user convenience decreases
Solution Approach 1:
The broadcast signal delivers EMMs during specific periodic entitlement reception periods rather than continuously. Receivers only need to tune to the broadcast signal during these scheduled periods to acquire EMMs, reducing the burden of continuous tuning while maintaining reliable access to rights information.
3Adaptability or versatility
If EMMs are delivered in broadcast signal, then receivers can acquire rights information without Internet connection, but not all receivers are continuously tuned to broadcast
Solution Approach 1:
EMMs are delivered in advance during entitlement reception periods through the broadcast signal, ensuring receivers have rights information available before needing to access protected content. This preliminary delivery approach accounts for the fact that receivers may not be continuously tuned, as the information is provided during specific windows when receivers are expected to be listening.
Solution Approach 2:
The system dynamically adapts to receiver tuning behavior by delivering EMMs during specific entitlement reception periods rather than requiring continuous tuning. This dynamic approach allows the system to accommodate receivers that tune in and out while still ensuring they receive necessary rights information.
Data Source
AI summary
Techniques are described for efficient delivery and reception of information, such as an Entitlement Management Message (EMM), that is related to Digital Rights Management (DRM) in a terrestrial broadcast system such as ATSC 3.0.