Originally Posted by TimHuey
Sorry to revive such an old thread but I am also using an Xbox One and having the same problem with the AVS709 WhiteClipping pattern showing all bars as you were experiencing. I'm going to play the pattern from a different player if I can find one on the same HDMI port.
Hi, what TV model do you have?
SDR Movies mastered for REC.709 2.4 gamma and 100 nit (reference/night mode targets), when you set your contrast you have to allow headroom above 100% Reference White (and not to clip), so to be able to see details up to 109% Super White.
You can see why you need to leave 'headroom' there
, with some picture examples of 'out of video legal range values' using 'Mission Impossible - Fallout Blu-Ray' movie as example there
or some other frame animations of some movies using waveform monitor analysis
Grade-1 SDR Reference Monitor/TV Calibration Targets
The viewing of accurate images depends on an accurate calibration of the display, control over the viewing environment (lightning and room decor), as well as the appropriate placement of the observer relative to the screen. (distance per content resolution and viewing angle).
The Reference Viewing Environment can be considered where color critical decisions are made, while the Home Viewing Environment is where finalized deliverables are viewed, with the intent to best match the original artistic intent, as defined by the director and colorist within the Reference Viewing Environment.
The goad of home TV calibration is the Home Viewing Environment to match the Reference Viewing Environment image.
Within the professional industries, reference monitors (Grade-1) are the standard for color critical work.
EBU TECH 3320 (Version 4.1 - September 2019) - User Requirements for Video Monitors in Television Production, defines the technical characteristics for video broadcast monitors used in a professional TV production environment for evaluation and control of the images being produced.
These specifications describing the definition of Grade-1 SDR Reference Monitor with Standard Dynamic Range capabilities.
Grade-1 Monitors are devices for high-grade technical quality evaluation of images at key points in a color grading production workflow.
Grade-1 Monitors are used for critical evaluation during post-production.
As a minimum requirement, these monitors shall have the quality properties of the image system they are used to evaluate.
It's expected that all applied technologies are state-of-the-art at this level as the Grade-1 monitor is a 'measuring instrument' for visual evaluation of image quality.
Grade-1 SDR Reference Monitor should be been calibrated and capable to produce a reference luminance level of 100 cd/m2 (nits) for 100% White (235 level @ 8-bit) patch on the screen.
Automatic Brightness Limiter (ABL) functions shall not be used for Grade-1 SDR Reference Monitors, this means that the monitor need to be capable to display 100 cd/m2 with a full field 100% Reference White pattern also.
100% luminance on the screen corresponds to a 10-bit luma signal of digital level 940, and the black level corresponds to a 10-bit luma signal of digital level 64.
100% luminance on the screen is defined as the luminance of a luma signal of digital level 940, but levels 941 through 1019 should also be correctly displayed.
The highest value of 10-bit luma signal is digital level 1019. The luma level 1019 is called 'Super-White' or '109% White'.
For the luminance gamma characteristic (Electro-Optical Transfer Function) of the screen, its recommended that a nominal value of 2.4 gamma to be used.