Overview
CEN ISO/TS 18234-2:2013 (TPEG1-SSF) is a technical specification in the ISO/TS 18234 series for Intelligent Transport Systems (ITS). It defines the syntax, semantics and framing structure of the TPEG1 binary data format used for traffic and travel information. The document specifies how TPEG data-streams are framed, referenced and encoded so that service providers can signal the availability or redirection of the same service across different bearer channels or supply related service data from another source.
Key Topics
- Frame and layer model: Transport, service and service-component frame structures and their hierarchical relationship in a TPEG byte-stream.
- Syntax and data types: Byte-ordering conventions, data type notation, templates, components and rules for representing variable and reusable data structures.
- Referencing and signalling: Method of referencing within a TPEG data-stream to indicate alternative bearer channels or related service data (scope emphasis).
- Synchronization and integrity: Use of syncwords, header and data CRCs, error detection and synchronization methods to ensure reliable decoding.
- Service identification and encryption indicators: Fields used to identify services and flag encryption where applicable.
- Auxiliary methods and annexes: Character tables, coding quantities of objects (Numag), CRC calculation methods, time calculation routines and a C-style byte-stream description (informative).
- Design principles and application interfaces: Guidelines for application-dependent data types, toolkits and interface points for application-specific frames.
Applications
This specification is practical for organizations that implement or operate traffic and travel information systems:
- ITS solution developers building TPEG encoders/decoders, middleware, or broadcast multiplexers.
- Broadcast and mobile data service providers that distribute traffic and travel messages over DAB, DVB, cellular or other bearer channels.
- Navigation and telematics vendors integrating real-time traffic feeds into in-vehicle systems or mobile apps.
- System integrators and testers who validate framing, CRCs and synchronization for reliable reception.
- Standards bodies and implementers aligning multi-bearer service distribution and referencing behaviors.
Related Standards
- Part of the ISO/TS 18234 (TPEG1) series - consult other parts of the series for payload definitions, application protocols and additional binary format aspects.
- Relevant to broader Intelligent Transport Systems (ITS) standards and transport protocol specifications for traffic and travel information.
Keywords: TPEG1, ISO/TS 18234-2:2013, TPEG1-SSF, traffic and travel information, binary data format, framing structure, syntax and semantics, ITS.
