ISO/IEC 23008-4:2020

Overview

ISO/IEC 23008-4:2020 - MMT reference software - specifies the reference and conformance software for MPEG Media Transport (MMT). The standard provides a software implementation and descriptive documentation that can be used to validate and clarify the normative clauses of other parts of ISO/IEC 23008. It supplies test vectors comprising an MMTP sender and MMTP receiver, together with software modules, configuration formats, and guidance for building and running the reference implementation.

Key Topics

• Software architecture: sender/receiver operation, class diagrams, and module interactions for packetization, de-packetization and reconstruction.
• MMTP packet handling: packet types for MPU (Media Processing Unit), GFD (Generic File Data), and signaling; packet main header and payload metadata structures.
• Reconstruction modules: processes to reconstruct MPUs, generic files, and signaling XML from received MMTP packets.
• Configuration file format: canonical parameters (e.g., VERSION, DEMON for sender/receiver mode, DIR_SENDER_MPU_AUDIO, DIR_RECEIVER_MPU, DIR_PKT, MTU) and an example configuration that controls sender/receiver behavior and file locations.
• Conformance and test vectors: reference test vectors to demonstrate conformity or non-conformity with ISO/IEC 23008 normative clauses.
• Version control and compiling: recommended development environment details (C/C++, Ubuntu/Linux, GCC 4.8.1, Eclipse C++ IDE) and dependencies (TinyXML for packet viewing, pthread).
• Purpose of the reference software: validation of written specifications and clarification of normative behavior for implementers.

Applications

• Implementers and developers of streaming systems use ISO/IEC 23008-4 reference software to build and verify MMT-compliant MMTP senders and receivers.
• Interoperability and conformance testing: test labs and QA teams run supplied test vectors to validate device or server behavior against MMT transport rules.
• Research and prototyping: academics and engineers prototype new delivery mechanisms or integrate MMT into heterogeneous environments (broadcast, OTT, IP networks).
• Product vendors (encoders, packagers, players) ensure correct packetization, metadata handling, and reconstruction of MPUs and signaling.

Related Standards

• ISO/IEC 23008-1 - MPEG Media Transport (MMT) core specification
• ISO/IEC 23008-2 - High Efficiency Video Coding (HEVC) (codec related)
• ISO/IEC 23008-7 - Conformance for MMT
• ISO/IEC 23008-10 / -11 / -13 - FEC codes, Composition Information, and Implementation Guidelines referenced by this part

This standard is essential reading for anyone implementing, testing, or integrating MMT/MMTP-based media delivery solutions and provides the concrete reference software and configuration examples needed to ensure correct, interoperable deployments.