Regarding the recent HDR presentation
There is both a correction and an elucidation for “HDR: The Great, the Okay, and the Yikes!”
Correction: About 35:30 in, the term “ground glass” is used for what test viewers looked at during projector-illuminated tests. Actually, it was an LCD screen being rear-illuminated by the projector.
Elucidation: At about 26:24 in, the chart says “Peak Brightness;” as “brightness” is a perceptual term, the original chart should have been labeled “Peak Luminance.” Since the black level was fixed, the increased luminance did indicate increased dynamic range.