Originally Posted by mombasa123
Thanks. Yes, I read the documentation and the disk is mastered at 1000 nits but was not quite sure what that actually meant. So, I will leave the contrast at 45 to match EOTF curve and not reduce it further as the clipping above 1000 nits is expected.
White Clipping Demonstrates how well your display tone maps peak luminance information based on the metadata in which it’s being feed. The metadata within this particular pattern is designed to clip at 1,000 nit. However, no matter how much you raise or lower the contrast controls, the peak luminance information (flashing bars) will always remain the same, even though the light output may increase or decrease onscreen. This is due to the internal tone mapping of your display.
Will try and find some 4K nit patterns - Spears & Munsil on order so maybe that has some.
These patterns can be found within the miscellaneous section of our HDR-10 test pattern suite (digital files). Under "HDR Clipping Test Patterns" there are four different variations of the HDR Clipping Grayscale patterns - 1,000 nit, 2,000 nit, 4,000 nit and 10,000 nit mastering peak luminance, along with the corresponding MaxCLL.
Also, under the "White Clipping 80-100 Different nit Levels" I have nine variations of white clipping test patterns from 2,000 nit to 10,000 nit in 1,000 nit increments, all with the proper corresponding metadata.
The MediaInfo of the 4,000 nit pattern regarding nit level is as follows:
Mastering display luminance: min: 0.0005 cd/m2, max: 4000 cd/m2
Maximum Content Light Level: 4000 cd/m2
Maximum Frame-Average Light Level: 400 cd/m2
I hope this helps. Please let me know if you have any further questions or concerns. Thank you!
- Ryan M.