This repository tracks ST 2094-50 - Dynamic Metadata for Color Volume Transform - Application #5 (Broadcast)
This repository is public.
Please consult CONTRIBUTING.md, CONFIDENTIALITY.md, LICENSE.md and PATENTS.md for important notices.
Your feedback is welcome at https://github.com/SMPTE/st2094-50/issues.
The second Public Committee Draft (PCD2) of ST 2094-50 is made available in 10e-st-2094-50-cd-2026-02-23-draft.zip for a review period ending no later than 2026-03-16.
To view the document, please download the ZIP file, extract the files, and open the HTML file in your browser.
In “Dynamic Metadata System for Color Volume Transform,” ST 2094-50 defines a standardized framework that enables modern operating systems, image compositors, and display pipelines to render multiple HDR and SDR sources - text, graphics, images, and video within a common color-volume architecture.
The system anchors rendering behavior around an explicitly defined HDR Reference White, carried within embedded dynamic metadata. By clearly identifying Reference White, content creators gain the flexibility to establish their intended artistic “look,” while also preserving perceptual intent across displays with widely varying peak luminance capabilities.
ST 2094-50 addresses a long-standing challenge: consistent compositing of mixed HDR and SDR elements. Until now, such workflows have either required manual color management, been inconsistently implemented, or lacked predictable behavior across platforms—including web browsers, consumer televisions, and desktop displays. By standardizing dynamic color-volume transforms, ST 2094-50 provides a path toward interoperable, perceptually consistent HDR rendering in heterogeneous display environments. We look forward to your comments.
Implementers are encouraged to review the system and provide feedback as soon as possible but no later than March 16, 2026, via GitHub, to help improve the document and enhance interoperability across implementations.
Please report issues at https://github.com/SMPTE/st2094-50/issues or to 10E Chairs 10e-chair@smpte.org.
The draft version(s) of this document is accessible to SMPTE Standards Community members at https://github.com/SMPTE/st2094-50-private.