Originally Posted by Viper2847
ok weird thing i just noticed about the ACE setting. Before I was told it ONLY affects dark scenes, but just now when i turned it on low it makes everything on my xbox360 dashboard (which is VERY bright,its all made up of green/yellow/blue/red/white) darker. Its as if i turned down the backlight 1 or notches. Can someone explain why ACE is dimming the picture even on something bright? I dont like how its doing this. I dont mind it making the darker scenes darker as long as the auto dimm is less obvious,but it does annoy me if it dims down bright scenes as well.
I don't have an xbox360 so I don't know what the dashboard is composed of. If it is brightly colored letters on a black background, the processor may interpret that as a dark scene. Or maybe it is all filled with brightly lit colors and background, but none of the colors used contains, say, any green (or some other primary color), so the processor interprets the scene as having very dark green and dims the backlight for it. I am just speculating, perhaps you could post a picture of the dashboard.
What is your brightness setting set to for the 360's input? If you need to have the brightness set higher for the 360input than you do for over-the-air tv stations, then that would indicate that the 360 is putting out video with an intrinsically lower brightness level than the processor is expecting, so it interprets even medium bright scenes as dark scenes and dims the backlight.
As I said in a previous post, the processor doesn't take into account what you have the brightness setting set to. So if you have to crank the brightness way up to make a scene look normal (or even extra bright), the processor stills calls it a dim scene. If ACE is on, it starts dimming the backlight sooner than it would if ACE were off. If ACE is off, it doesn't dim the backlight until the scene is quite dark, but then it is an all or nothing proposition.
I recommend leaving ACE off, unless you get a lot of auto dimming that bothers you, then put it on low to minimize the effect. There really aren't any other options. Its just something that has to be lived with.
I attached a graph of my interpretation of how ACE works. I haven't been able to explore low vs high settings. I suspect the high setting may start dimming even sooner (on brighter scenes) to make the slope of the green line more gentle. I'm also not sure where the vertical red line crosses the sloped green line, but I think it is very close to the bottom of the red vertical line. It's also possible that ACE on low is more like the lower graph, which would have it start dimming already on fairly bright scenes. My spouse gets tired of my constant fiddling with the new TV!