Originally Posted by sotti
ADU, you realize Chris has access to some extremely high end hardware including signal analyzers?
He's pulling his results directly from the HDMI wire. He's got the gear to isolate the player and test it's performance in a vacuum.
Yep. That's why I'm askin him this stuff, cuz I know he's got the good toys to check these things out.
My YCbCr green push tests on the S185, S380 & S390 could be wrong, because I only used one display for those, and had no accurate source to cross-reference with (yet?). Chris's S590 results make that a very likely possibility.
I'm sure you can also understand some of my skepticism though about this, given the rash of green clipping and push errors I've found in the RGB modes on the recent Sony BD players, which have been confirmed on 2 different displays in my tests, and also re-affirmed by Chris's RGB mode tests on the S590. To briefly recap, here's what we seem to agree on so far...a
Green is being pushed in the RGB HDMI mode with all three PQ Settings (Standard, Bright & Theater).a
The Standard PQ mode clips green at around 92-93% stimulus in the RGB HDMI mode.a
The Bright Room PQ mode clips green at around 91-92% stimulus in the RGB HDMI mode. (I'm assuming Chris's results on the S590 were similar, or he would have disagreed with this.)a
The Theater Room PQ mode shows no evidence of green clipping near white in the standard 16-235 video range in the RGB HDMI mode. (Chris shows some green clipping above
video white on the S590 in this mode. But not below video white in the standard 16-235 video range. So our results also jibe on this.) However, neither of us recommend using the Theater Room mode because we're seeing other weird stuff with the colors, levels or gamma in this setting.a
There is no clipping near video white in the standard 16-235 video range in the YCbCr HDMI modes, with any of the PQ mode settings.a
YCbCr HDMI modes in Standard Picture Quality mode are generally the best way to go on these players.
And here's what we don't agree on...r
Green is being pushed in the YCbCr HDMI mode.
Chris says the YCbCr HDMI modes on the S590 are "bit-perfect", which means no sign of green push in those modes. My tests with a Gateway LCD (which has made the correct call on everything else above) seems to suggest otherwise.
If Chris's equipment says the YCbCR modes are 5x5 though, I believe him, which means either...a)
there's a problem with YCbCr processing on my LCD, or...b)
my PNG and DVD-Video tests are not as accurate predictors of HD Blu-ray video results in YCbCr HDMI mode as they are in the RGB mode, or...c)
the other players (S185, S380 & S390) are doing something different in YCbCr modes than the S590.
At the moment, I don't know which of these answers is correct. But I plan to pick up an S590 to see if I can reproduce his results with that player. If the color output looks the same in YCbCr HDMI modes as the other players on my Gateway display, that would tend to make me think the problem is in the display's YCbCr processing.
If your observations are different, you need to start looking at the other hardware you are using to test with.