Overview
CEN ISO/TS 18234-10:2013 - Intelligent transport systems: TPEG1 Conditional Access Information (TPEG1‑CAI) - defines the binary on‑air data format and service structure for delivering conditional access information (CAI) via the TPEG1 transport protocol. The Technical Specification describes how dedicated CA data (for example Control Words and Entitlement Control Messages) can be broadcast to client devices over a limited‑capacity, unidirectional broadcast channel without two‑way handshaking. It covers the logical channel for CAI and how CAI is linked and synchronized to scrambled content, enabling service setup, prolongation or revocation for targeted receivers.
Key topics
- Application definition and versioning - application identification and version number signalling (TPEG‑CAI_1.0/001).
- Service component data - structure for packaging CA payloads inside TPEG service components.
- Conditional access methodology - design principles for delivering management messages (Control Words, ECMs) to end devices via broadcast.
- Message components and CAIDataUnit - definitions of message types, component IDs and syntax for CAI messages.
- Binary SSF and data types (Annex A) - the Syntax, Semantics and Framing (SSF) binary definitions and primitive/compound data types used by TPEG1.
- Linking & synchronization - methods to associate CAI with scrambled content streams so receivers can apply access control.
- On‑air interface - binary stream framing, transport and service layer descriptions relevant to broadcasters and receiver implementers.
Applications
- Securely delivering conditional access management data to receivers in digital radio, DAB, broadcast TV or other TPEG‑carrying bearers.
- Broadcasting Control Words and Entitlement Control Messages for pay services or regionalized content without a return channel.
- Supporting conditional access workflows where the service provider needs to establish, prolong or revoke service for specific client devices over broadcast links.
- Embedding CA metadata in traffic and travel information services to control access or subscription entitlements.
Who should use this standard
- Broadcast service providers and conditional access system vendors.
- Receiver and set‑top box manufacturers integrating TPEG1 support.
- System integrators for digital radio/TV distribution and content scrambling.
- Standards bodies and implementers working on ITS (Intelligent Transport Systems) data delivery and secure service provisioning.
Related standards
- ISO/TS 18234 parts 1–11 (TPEG1 series): TPEG1-INV, TPEG1-SSF, TPEG1-SNI, TPEG1-RTM, TPEG1-PTI, TPEG1-LRC, etc.
- Reference keywords: TPEG, TPEG1-CAI, conditional access, ISO/TS 18234-10, traffic and travel information, binary data format.
This specification is essential when implementing conditional access over TPEG1 broadcast channels and for ensuring interoperable CA message delivery between service providers and client devices.
