Originally Posted by cat-222ASR
Can you see the brightness of the old one is FAIL!
Yep, I can. (And thx for emphasizing my point on that, in case anyone missed it.
I watched a bit more of the 15th Ann. Ed. on my CRT, and stand by my earlier comments. Overall, I'd say the contrast/brightness is better on this newer edition. Most of the FX shots look better. But it's startin to get a tad muddy/murky-lookin to me in some scenes as well. So it's possible they may have over-compensated a bit on the gamma. "Dark" is de rigueur
though at the moment. So this view is obviously open for debate.
In one of your other posts, you mentioned the surround/ambient light levels which I agree is also an important factor (probably more so than display gamma) in making these kinds of contrast/gamma/brightness assessments. And AFAIK
, there is no widely agreed upon standard for that in HDTV production, other than the old SMPTE guidelines of less than 10% relative luminance
For the record, I try to keep the white level on my TV adjusted so that an ~15% stimulus flat field gray on the screen is a pretty close match to ambient/surround light levels around the TV. The 15% gray is designed to simulate the APL (average picture level) of video over time. This means that peak white on the display is approximately 100x the relative luminance of the surround. (A 15% stimulus gray has about 1% relative luminance on a 2.4 gamma screen.) IMO, this is a reasonable target for typical very dim/nighttime surround viewing conditions in both home and mastering environments. And it's well below the 10% maximum luminance surround recommended by the old SMPTE spec. So this is what my assessments are based on.
Most of the time, this arrangement works pretty well for professionally mastered home video content, but often some tweaking is needed either to gamma or white level for comfortable viewing. So I leave enough room for adjustment in the white level on the TV to accomodate a range of ambient references between about 12.5% and 20% stimulus gray on the screen (which equals roughly 0.67% to 2.0% rel. lum. on an ~2.4 display).