Q:
What is the difference between Rec.2020 HLG ARIB STD-B67 and_ Rec.2100 HLG, Rec.2100 HLG(Scene) in the Timeline color space of Davinci color management tab?
A:
The differences between Rec.2020 HLG ARIB STD-B67, Rec.2100 HLG, and Rec.2100 HLG (Scene) in the Timeline color space of DaVinci Resolve’s color management tab relate to their respective color spaces, transfer functions, and intended uses. Here’s a breakdown of each:
Rec.2020 HLG ARIB STD-B67
- Color Space: Rec.2020
- Transfer Function: HLG (Hybrid Log-Gamma)
- Standard: ARIB STD-B67
- Usage: This is an early implementation of HLG defined by the Association of Radio Industries and Businesses (ARIB) in Japan. It uses the wide color gamut (WCG) of Rec.2020 and the HLG transfer function designed for high dynamic range (HDR) content. This combination is often used in broadcasting for HDR content, providing a backward-compatible format with standard dynamic range (SDR) displays.
Rec.2100 HLG
- Color Space: Rec.2020 (Rec.2100 encompasses the Rec.2020 color space)
- Transfer Function: HLG (Hybrid Log-Gamma)
- Standard: ITU-R Rec.2100
- Usage: Rec.2100 HLG is part of the ITU-R Rec.2100 standard, which is an updated and more globally accepted standard for HDR content. It uses the Rec.2020 color space and the HLG transfer function, providing improved compatibility and standardization for HDR content across various platforms and devices.
Rec.2100 HLG (Scene)
- Color Space: Rec.2020 (Rec.2100 encompasses the Rec.2020 color space)
- Transfer Function: Scene-referred HLG
- Standard: ITU-R Rec.2100
- Usage: The Rec.2100 HLG (Scene) option refers to using the HLG transfer function in a scene-referred context, meaning the transfer function is applied based on the scene’s light values rather than the display-referred values. This is useful in certain workflows where the HDR grading is done with reference to the scene’s luminance rather than the display’s output luminance.
Summary of Differences
- Standards and Updates: Rec.2020 HLG ARIB STD-B67 is an older standard specific to Japan, while Rec.2100 HLG and Rec.2100 HLG (Scene) are part of the more recent and widely adopted ITU-R Rec.2100 standard.
- Usage Context: Rec.2100 HLG is typically used for display-referred HDR grading, whereas Rec.2100 HLG (Scene) is used for scene-referred HDR grading.
- Compatibility and Adoption: Rec.2100 HLG options are generally preferred due to their broader compatibility and adoption in the industry.
In DaVinci Resolve, selecting the appropriate timeline color space depends on your workflow requirements and the standards you are adhering to. Rec.2100 HLG and its scene-referred variant offer more flexibility and industry-standard compliance for HDR content creation.
Q:
What is the difference between Davinci YRGB and Davinci YRGB Color Managed?
A:
By choosing the appropriate color science setting, you can tailor DaVinci Resolve to match your workflow preferences and project requirements.