Overview
ISO/TS 18234-10:2013 defines the TPEG Conditional Access Information application (TPEG1-CAI), part of the TPEG1 binary data format for Intelligent Transport Systems. The specification describes a logical channel and binary on‑air format to deliver conditional access (CA) data - such as Control Words, Entitlement Control Messages (ECM) and Entitlement Management Messages (EMM) - from a service provider to client devices over a limited-capacity, unidirectional broadcast without service-client handshaking. The document is aligned with TPEG versioning (TPEG‑CAI_1.0/001) and integrates with TPEG syntax, semantics and Service & Network Information (SNI).
Key topics and technical requirements
- Conditional Access Methodology: Defines CA applied at the service component level and how CA data is separated from scrambled content for secure delivery.
- Logical Channel & Synchronization: Specifies how CAI is linked and synchronized to scrambled service components so client decoders can associate CA messages with relevant encrypted content.
- Service Component Data Framing: Uses CRC-protected service component frames and defines ApplicationContent to carry one or more CAI messages.
- Message Components & Data Units: Defines CAIMessage and CAIDataUnit structures (message counts, component IDs) for transporting management messages.
- Signalling and Identification: Uses Application Identification (AID) and version number signalling (major 1, minor 0) to route and decode CAI within TPEG services.
- Integration with TPEG infrastructure: Relies on TPEG-SSF (syntax/semantics/framing) and TPEG‑SNI (Service & Network Information) for EncID signalling and linking CA bundles to service components.
- Open Integration: Designed as an open framework to integrate various external conditional access systems signalled via TPEG EncID.
Applications and who uses it
ISO/TS 18234-10:2013 is intended for organizations and roles implementing broadcast-based conditional access for traffic and travel information:
- Broadcast and IP service providers delivering scrambled multimedia or data services over TPEG streams.
- Conditional access system vendors (CA integrators) who provide Control Word/ECM/EMM handling.
- Receiver and client device manufacturers (automotive head units, infotainment systems) implementing TPEG decoders and CA handling.
- Automotive OEMs and telematics providers that need secure delivery of paid or subscription-based services via broadcast.
- System architects and integrators designing TPEG service components, SNI tables and EncID signalling.
Related standards
Keywords: ISO/TS 18234-10:2013, TPEG1-CAI, Conditional Access Information, TPEG conditional access, Control Words, ECM, EMM, TPEG service component, Encryption Identifier, intelligent transport systems.