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DVE brightness question

post #1 of 9
11/13/09 at 2:43am
Thread Starter 
checked the stickies up top but the only relevant one was for avia and stuff

pretty quick question. Using Digital video Essentials HD, i had a question about the brightness pattern.

First, i believe the bars are +2%, +4% and -2% black right? with the inner bars being +2 +4 and the outer being -2. is that correct?

second, i wanted some clarification on where i should set the brightness. I see all 3 bars when i crank it. Where should i adjust the brightness? I dont think it should be to where the -2% (far right) bar just barely disappears, that seems a bit too bright. but i think its what the disk says to do. Should i just bump it up to where the inner bar is just barely visible? im not really sure what to do

right now i set it to where the far outer bar disappeared and knocked it down about 2 notches below that. that made the far inner bar about a notch or two above totally disappearing.

just wondering how this should be done properly, the description on the disk is kinda confusing
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post #2 of 9
11/13/09 at 5:50am
I agree it's confusing. Seems so simple but setting it right makes a big difference in PQ.

On my TV I have set the +2% bar to be just barely visible. In fact if you click down one more it will disappear. I have a plasma Panasonic 42PZ85 TV. This setting may be slightly biased to the black but it seems to help the overall gamma value by getting low end luminance gamma values a little (higher) closer to the 2.2 standard.
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post #3 of 9
11/13/09 at 6:43am
Greetings

You do exactly as the instruction video says. Decrease until the blacker than black bar blends into the background. Never losing the 2% bar.

Blend = cannot not see it anymore.

regards
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post #4 of 9
11/13/09 at 1:14pm
Thread Starter 
ok so did i have the labels of what bars are what correct?

hmm 2 different replies there, lol. at 50 the far right one ( -2% right?) just barely disapears. and at 46 the inner one (+2% right?) just barely disapears as well.

am i really suposed to just crank it up to 50? (outer bar just barelly disapearing) that seems too bright and scenes look a bit washed out sometimes. whats the proper way, i got 2 different answers lol.

when screwing around, something like what plasma54321 said sounds closer to what i did. at 47 the inenr bar is just BARELY visible. At a quick glance you may even miss it. I bumped it up to 48 which is still very faint. not really sure which it should be at.
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post #5 of 9
11/13/09 at 2:20pm
Quote:
Originally Posted by kenshin-dono View Post

ok so did i have the labels of what bars are what correct?

hmm 2 different replies there, lol. at 50 the far right one ( -2% right?) just barely disapears. and at 46 the inner one (+2% right?) just barely disapears as well.

am i really suposed to just crank it up to 50? (outer bar just barelly disapearing) that seems too bright and scenes look a bit washed out sometimes. whats the proper way, i got 2 different answers lol.

when screwing around, something like what plasma54321 said sounds closer to what i did. at 47 the inenr bar is just BARELY visible. At a quick glance you may even miss it. I bumped it up to 48 which is still very faint. not really sure which it should be at.

Sounds like 48 is probably right.
-2% invisible, 2% visible.

the other spot may be half way between where 2% disappears and -2% dissapears, but it's more important to make sure 2% is always visible (So no lower than 47, from what you describe).
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post #6 of 9
11/13/09 at 2:21pm
Quote:
Originally Posted by kenshin-dono View Post

the far right one ( -2% right?) just barely disapears. and at 46 the inner one (+2% right?) just barely disapears as well.

The DVE PLUGE with Gray Scale pattern has 3 bars on either side of the PLUGE. The order is -4%, +4%, +2%, PLUGE, +2%, +4% and -4%. I don't know what type of TV you have but if it is a plasma then basically the way that I suggested improves the gamma (increases it). Adjust brightness so +2% inner bars are just barely visible (1 click up from not there). Make sure you are in a darkened room setting for this adjustment. All plasma TVs have a characteristically low gamma (see Displaymate site and articles). This setting seems to help when signals are coming out of black - making it more inline with what a CRT would look like.

When I adjusted my TV this way my wife was convinced that I had adjusted the Picture (Contrast) control and made the display brighter - more 3d. I told her that I only lower the Brightness slightly. It does make a noticeable difference when you get the setting just right.

If you don't have a plasma TV this does/may not apply.
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post #7 of 9
11/15/09 at 6:44pm
Thread Starter 
its a DLP btw. Ya sounds like 47 is the bare bottom before the inner bar disapears so im gonna just play with 47 or 48 and see where i like it better, 47 seems to have blacker blacks without any real detail loss that i can see so maybe i'll stick with that tnx
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post #8 of 9
11/16/09 at 7:55am
You might be interested in the following article regarding Black Levels of various display types from DisplayMate.com. The article seems to place the DLP between the CRT and a plasma display for gamma.

Display Technology Shoot-Out Comparing CRT, LCD, Plasma and DLP Displays
Part II - Gray-Scale and Color Accuracy (see http://www.displaymate.com/ShootOut_Part_2.htm)
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post #9 of 9
11/19/09 at 2:28pm
Thread Starter 
tnx ill give it a read
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