A proprietary Orion Colour technologyParametric, mathematically invertible colour conversion
Traditional LUT-based workflows are fixed and differ across implementations. ORION-CONVERT™ replaces that with configurable controls, saved as presets for the conditions of a specific production — invertible enough to round-trip pixel for pixel.
Five stages, one transform
Expand each stage for detail. On mobile, the pipeline reads top to bottom instead of left to right.
HDR domain
The first stage of highlight compression — or expansion, depending on the direction of the conversion. In an HDR-to-SDR conversion, this happens in the HDR domain, before the colourimetric conversion.
Colourimetric transform
The mathematically defined transform between EOTFs and gamuts — SDR, HLG, PQ and S-Log3 — carried out on the compressed signal. This is the step that makes the whole pipeline exactly invertible.
SDR domain
A second stage of highlight compression or expansion, applied after the colourimetric conversion. In an HDR-to-SDR conversion, this happens in the SDR domain.
Parametric look controls
Parametric controls over the image pipeline's look, including presets that emulate Sony's Live and Mild looks for HLG and S-Log3.
Signal delivery
Signal clamping, P3 limiting on HDR output, and Gamma Compensation to correct for the subjective change in appearance between SDR and HDR.
The roundtrip
Pixel-perfect roundtrip
Why there's no single right answer
In the context of ORION-CONVERT™, HDR refers to High Dynamic Range displays — TVs or monitors — or a video signal intended to be viewed on one, not to the concept of HDR used in stills photography.
Modern television cameras can capture a fairly high dynamic range, and their internal processing can output either an HDR signal that reproduces that range on a suitable display, or an SDR signal in which the highlights are clipped or compressed so the image stays viewable on an SDR display.
There is no single correct way to convert an HDR image for SDR viewing. Several methods are used, each attempting to preserve as much of the original HDR appearance as possible — or, in other cases, to produce a deliberately different look.
What ORION-CONVERT™ covers
- — Mathematically defined transform
- — Mathematical invertibility
- — Pixel-perfect roundtrip
- — Parametric controls, saved as presets
- — 32-bit floating-point processing
- — SDR, HLG, PQ, S-Log3 and LogC3 conversions
- — Scene-light and Display-light modes
- — Dual-stage highlight compression / expansion
- — Gamma Compensation
- — NBCU and British TV / BBC emulation presets
- — HLG Live / Mild and S-Log3 Live / Mild look presets
- — Clamping and P3 limiting
- — ITU BT.2100 and BT.2408 compliance
Supported gamuts
BT.709, BT.2020, LogC3, S-Gamut3, S-Gamut3.Cine