ISO IEC 23091-2-2025 PDF
Name in English:
St ISO IEC 23091-2-2025
Name in Russian:
Ст ISO IEC 23091-2-2025
Original standard ISO IEC 23091-2-2025 in PDF full version. Additional info + preview on request
Full title and description
ISO/IEC 23091-2:2025 — Information technology — Coding-independent code points — Part 2: Video. Defines a set of coding‑independent code points and metadata fields for describing properties of video (and still image) representations in a way that is independent of compression encoding and bit rate.
Abstract
This international standard specifies code points and fields that establish properties of a video or still‑image representation that are independent of codec and bit‑rate. These metadata elements can be used to describe how decoded video should be interpreted (colourimetry, transfer characteristics, dynamic range, etc.) or to describe the characteristics of an input signal prior to encoding so that encoders/decoders, renderers and workflows interoperate consistently.
General information
- Status: Published
- Publication date: 26 February 2025
- Publisher: ISO and IEC (Joint publication — developed under ISO/IEC JTC 1/SC 29)
- ICS / categories: 35.040.40
- Edition / version: Edition 3 (2025)
- Number of pages: 30
Scope
The standard defines coding‑independent code points (CICP) and associated fields for video and still images to enable consistent interpretation and signalling of video properties across codecs, containers and production/distribution chains. It covers metadata for signal interpretation (for example colour primaries, transfer characteristics, matrix coefficients, full‑range vs limited‑range), signalling of dynamic range and wide colour gamut, and other descriptors needed to ensure interoperable rendering and encoding decisions regardless of compression format.
Key topics and requirements
- Definition of coding‑independent code points and named fields for video signal properties.
- Standardized signalling of colour primaries, transfer function, matrix coefficients and range flags.
- Metadata fields to indicate bit depth, chroma sampling, frame rate and aspect ratio for interpretation.
- Support for dynamic range and wide colour gamut signalling (HDR/WCG metadata identifiers and interpretation guidance).
- Codec‑agnostic URN/code‑point usage to allow consistent mapping across codecs and file formats.
- Requirements for interoperability between encoders, decoders, renderers, production tools and service delivery systems.
- Guidance that enables content‑production practices and device implementations to use common code points for consistent playback and processing.
Typical use and users
Used by implementers of video encoders and decoders, container and file‑format developers, streaming and broadcast engineers, device manufacturers (TVs, set‑top boxes, mobile devices), content production and post‑production facilities, content distributors and testing/conformance laboratories. Also referenced by standards bodies and software libraries that need a stable, codec‑independent way to signal video interpretation properties.
Related standards
Closely related parts of the ISO/IEC 23091 (MPEG‑CICP) family: ISO/IEC 23091-1 (Systems), ISO/IEC 23091-3 (Audio) and ISO/IEC 23091-4 (Usage guidance). Also related to ITU‑T H.273 (video signal type code points) and legacy ISO/IEC 23001-8 work from which the CICP concepts evolved. Widely used alongside codec and container standards (AVC/HEVC/VVC, AV1, AVIF, MPEG systems) and industry metadata practice documents.
Keywords
Coding‑independent code points; CICP; video metadata; colourimetry; transfer characteristics; HDR; WCG; matrix coefficients; bit depth; chroma sampling; frame rate; aspect ratio; MPEG; ISO/IEC.
FAQ
Q: What is this standard?
A: ISO/IEC 23091-2:2025 is the third edition of the video part of the coding‑independent code points (CICP) series; it standardizes a set of code points and fields for describing video properties independently of codec or bit‑rate.
Q: What does it cover?
A: It covers the definition and use of metadata code points for video signal interpretation — including colour primaries, transfer functions, matrix coefficients, range flags, bit depth, chroma sampling, frame rate, aspect ratio and related descriptors that enable consistent encoding, decoding and rendering across systems.
Q: Who typically uses it?
A: Video codec and container implementers, device and display manufacturers, streaming and broadcast engineers, content producers, post‑production tool vendors and standards/interop test labs use this standard to ensure consistent signalling and interpretation of video content.
Q: Is it current or superseded?
A: This is the current (published) edition released in 2025 (Edition 3). It replaces earlier editions (for example the 2021 edition) and represents the up‑to‑date video CICP definitions as of its publication on 26 February 2025.
Q: Is it part of a series?
A: Yes — it is Part 2 of the ISO/IEC 23091 series (Coding‑independent code points). Part 1 covers systems, Part 3 covers audio, and Part 4 provides usage guidance for video signal type code points.
Q: What are the key keywords?
A: CICP, coding‑independent code points, video metadata, colourimetry, transfer function, HDR, WCG, bit depth, chroma sampling, frame rate, ISO/IEC JTC 1/SC 29.