ISO/IEC 23090-25:2025

Overview

ISO/IEC 23090-25:2025 - Information technology - Coded representation of immersive media - Part 25 - specifies conformance and reference software for the carriage of V3C data (Visual Volumetric Video-based Coding) as defined in ISO/IEC 23090-10. The document provides a reference implementation that extends the ISO Base Media File Format (ISOBMFF) library, describes its architecture and supported features, and publishes conformance test vectors to validate interoperability.

Key topics

• Reference software architecture: an ISOBMFF extension library plus a small command-line application (V3CCarriageApp) for basic multiplexing/demultiplexing operations.
• V3C carriage library API: documented functions for creating and parsing V3C-specific boxes and sample entries, adding parameter sets and setup units, handling tile and atlas sample entries, and retrieving unit headers and metadata.
• Supported features: utilities for timed and non-timed V3C, compatibility aids for DASH streaming scenarios, and modules to manage V3C parameter and setup data.
• Conformance test vectors: a collection of example files (timed and non-timed) - including named vectors referenced in the standard - intended for validating implementations and checking interoperability across players, packagers and test suites.
• Normative linkage: intended to be used with ISO/IEC 23090-10 (carriage of visual volumetric video-based coding data) and adopting ISOBMFF conventions.

Applications

ISO/IEC 23090-25 is practical for organizations and professionals involved in:

• Developer and integrators building packagers, players, and file toolchains that need to carry V3C data inside ISOBMFF containers.
• Codec and encoder vendors implementing V3C-compliant output and ensuring compatibility with carriage rules.
• Streaming platform engineers designing DASH workflows for volumetric video delivery (timed V3C for adaptive streaming).
• Test labs and QA teams using the provided conformance vectors to verify interoperability and compliance with ISO/IEC 23090-10.
• Research and academia exploring immersive media formats (MIV, V-PCC, PCC) and requiring a reference implementation to reproduce experiments.

Related standards

• ISO/IEC 23090-10 - Carriage of visual volumetric video-based coding data (normative reference)
• ISOBMFF - ISO Base Media File Format (foundation for the reference library)
• Other parts of the ISO/IEC 23090 series covering immersive media coding and carriage

The reference software and conformance files are published alongside the standard and are available via the ISO standards portal (https://standards.iso.org/). Use ISO/IEC 23090-25:2025 to accelerate interoperable implementations of volumetric video carriage and to standardize testing across products and research projects.