Overview
CEN ISO/TS 18234-3:2013 (ISO/TS 18234-3:2013) specifies the TPEG1-SNI (Service and Network Information) application of the TPEG1 binary data format for intelligent transport systems (ITS). It defines how service and network metadata is encoded and delivered inside a TPEG data stream to enable efficient, language‑independent distribution of information about service availability, alternative bearer channels, and related service-provider data directly from service providers to end users. This Technical Specification supersedes the 2006 edition and is intended for use where rapid, standardized service discovery and scheduling are required.
Key topics and technical requirements
- Application identification and conceptual model - rules for recognizing and structuring SNI application components within a TPEG multiplexed stream.
- Design principles - variable content referencing, service allocation concepts and rules for embedding SNI in a TPEG data stream.
- SNI data types - definitions for periodic time functions (masked time, start time, time slot), operating time functions and compound types for geographical coverage.
- Basic features and service metadata - encoding of service name/description, logos, subscriber/help info and free text, optimized for language independence.
- Service Tables and linkage - structured Service Tables (fast tuning, time schedule, content description, geographical coverage, reset/versioning, conditional access references) and mechanisms for linking components within the same service or related services.
- Coding structure - component frames, templates and concrete encoding rules for service information and tables to ensure interoperable implementation.
Practical applications
- Broadcast and IP-based transport of ITS metadata - enables radio, DAB, DVB, cellular and IP services to advertise availability, schedules and alternate channels in a standardized binary format.
- Receiver/device integration - in-vehicle navigation systems, infotainment units and mobile apps can automatically discover, tune and present related service offerings across providers and carriers.
- Service orchestration and redundancy - helps operators communicate alternate bearer channels (fallback streams) and cross-provider service mappings for continuity and seamless user experience.
- Multi‑language deployments - language-independent identifiers and structured tables simplify international rollouts and localization of service descriptions.
Who uses this standard
- ITS solution architects and system integrators
- Broadcasters and service managers (DAB/DVB/IP stream providers)
- Automotive OEMs and aftermarket device manufacturers
- Navigation and traffic information platform developers
- Regulators and standards bodies coordinating transport data interoperability
Related standards
- Other parts of ISO/TS 18234 (TPEG1 family) covering core syntax, TPEG applications for traffic and travel content, and data interchange profiles.
This specification is essential when implementing interoperable TPEG1 service discovery, scheduling and network‑level service metadata in intelligent transport system deployments.
