ISO IEC 13818-1-2025 PDF

Full title and description

ISO/IEC 13818-1:2025 — Information technology — Generic coding of moving pictures and associated audio information — Part 1: Systems. This international standard specifies the MPEG-2 Systems (system layer) used to multiplex, synchronize and manage timed delivery of compressed audio, video and related data streams (transport streams and program streams), built from PES packets and associated signaling.

Abstract

The system layer defined in ISO/IEC 13818-1:2025 supports synchronization of multiple compressed streams, interleaving into single streams, buffer initialization and continuous buffer management, time identification and multiplexing/signalling of components in program and transport streams. The transport stream additionally supports multiplexing of multiple programs with independent time bases; the program stream is optimized for near error-free environments and software processing.

General information

• Status: Published (International Standard).
• Publication date: 15 August 2025.
• Publisher: ISO/IEC (developed under ISO/IEC JTC 1/SC 29).
• ICS / categories: 35.040.40 (Coding of audio, picture, multimedia and hypermedia information).
• Edition / version: 10th edition (Edition 10.0).
• Number of pages: 324 pages.

Scope

This part of the ISO/IEC 13818 series defines the system-layer syntax and semantics required to combine compressed audio/video/data streams into program streams and transport streams, including PES packet structure, multiplexing, program and program association/signalling (PSI), timing and clock reference mechanisms, buffering models and constraints required for decoder operation and decoder start-up. It is intended to support the video and audio coding methods described in Parts 2 and 3 and to provide carriage for other data types that comply with the system-layer constraints.

Key topics and requirements

• Transport stream and program stream architectures and packetization (PES packets, packet headers and adaptation fields).
• Multiplexing rules for multiple programs and streams, including PAT/PMT (program association and program map) and PSI signalling.
• Time-stamping and clock reference mechanisms (PCR/PTS/DTS) and synchronization of decoding and presentation.
• Buffering model and constraints for continuous buffer management and decoder start-up.
• Support for carriage of additional data streams (ancillary data, subtitles, metadata and third-party codecs) subject to system constraints.
• Error environments and usage guidance: program stream for near error-free storage/processing, transport stream for error-prone transmission.

Typical use and users

Implementers of broadcast and streaming systems, digital TV equipment manufacturers, set‑top box and decoder developers, middleware and conditional-access vendors, content transport and headend engineers, system integrators, test laboratories and anyone implementing or testing MPEG-2 transport or program stream handling and signaling. The standard is used both for legacy compatibility and in systems that still rely on MPEG-2 Systems for multiplexing and carriage of other codecs.

Related standards

ISO/IEC 13818 is a multipart suite (MPEG‑2): Part 2 — Video (ISO/IEC 13818-2), Part 3 — Audio (ISO/IEC 13818-3), plus further parts and amendments (DSM-CC, conformance, software reference, AAC extensions, etc.). ITU-T Recommendation H.222.0 is aligned with the MPEG-2 Systems multiplexed bitstream definition. Recent amendments and editions to Part 1 (and related amendments) have been published across multiple years and have been consolidated into the 2025 edition.

Keywords

MPEG-2, ISO/IEC 13818-1, Systems, transport stream, program stream, PES, PAT, PMT, PSI, PCR, PTS, DTS, multiplexing, synchronization, buffering, JTC 1/SC 29.

FAQ

Q: What is this standard?

A: ISO/IEC 13818-1:2025 is the Part 1 (Systems) specification of the MPEG-2 family that defines the system-layer bitstream formats, multiplexing, timing, buffering and signaling used to carry compressed audio, video and related data.

Q: What does it cover?

A: It covers transport and program stream formats, PES packetization, PSI signalling (PAT/PMT), clock and time-stamp mechanisms (PCR/PTS/DTS), buffer models for decoder operation and guidelines for carriage of ancillary data and other codecs.

Q: Who typically uses it?

A: Broadcasters, streaming and headend engineers, decoder/set‑top and receiver manufacturers, middleware and conditional-access vendors, conformance/test labs and integrators implementing or validating MPEG-2 Systems behaviour.

Q: Is it current or superseded?

A: This is the current published edition (10th edition) dated 15 August 2025; earlier editions and amendments (for example the 2019/2015 editions and associated amendments) have been superseded by this 2025 edition.

Q: Is it part of a series?

A: Yes — ISO/IEC 13818 is a multipart standard (the MPEG-2 suite). Part 1 is Systems; other core parts include Part 2 (Video) and Part 3 (Audio), plus additional parts for conformance, DSM-CC and extensions.

Q: What are the key keywords?

A: MPEG-2, transport stream, program stream, PES, PAT, PMT, PSI, PCR, PTS, DTS, multiplexing, synchronization, buffering.