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The following elements are made available for a public review period ending no later than 2025-05-31:
- 10E-CD-ST-2136-1-Common-LUT-Format-2025-02-06.pdf
- st2136-1a-202x.xsd
- st2136-1b.clf
- st2136-1c.clf
- st2136-1d.clf
- st2136-1e.clf
SMPTE ST 2136-1 “Common LUT Format” defines an XML file format for the interchange of color transformations using an XML schema. The schema supports Look-Up Tables of several types: 1D LUTs, 3D LUTs, and 3×1D LUTs, as well as additional transformations such as matrices, range rescaling, and the ASC’s Color Decision List.
SMPTE ST 2136-1 is based on an earlier specification published by the Academy of Motion Picture Arts and Sciences [1] and is intended to be backwards compatible.
Existing CLF instances based on [1] can be converted into the SMPTE-compliant CLF format by only changing or adding the default namespace xmlns="http://www.smpte-ra.org/ns/2136-1/2024"
A Public Committee Draft of SMPTE ST 2136-1 and sample CLF files are being provided for review in this repository for a review period ending on 31 May 2025. Developers are encouraged to implement the design and provide feedback via GitHub to improve the document and to increase interoperability between implementations.