CurtPalme.com Home Theater Forum

[Corleone88]

Hello,

I am trying to fix a problem with crushing blacks on my BG808.
In doing that, I was thinking about something: on Lumagen product you can set the luminance level on different IRE values. For example : 0.5, 1 and 1.5...
If you want to have a very dark black level at 0IRE, you can set your luminosity level pretty low. Then unfortunately, you have crushing blacks, but also a very dark black for 0IRE. Then if you set the luminance value for 0.5IRE, 1IRE and 1.5 IRE in order to remove the crushing black, would you keep your very dark black at 0IRE and have a very nice picture at the low end?

[Nashou66]

Just do 5% to where it should be if your meater can get that low. If not eyeball it, you can get pretty close. What this does tho is raise 0 %.
So now go to 0% luma and lower it to half the value it goes up to. I think 0 will go down to 1o clicks, can't remember. But what i did was i put up a 2 or 3 % pattern and raise 0 % in the radiance luma menu till I started to see the 2% pattern then stopped.

The Lumagen interpolates the % whites in between each % white pattern. So adjusting 10% will affect 7.5% thru 12.5% when using the 5% intervals . Or if using 10% intervals then adjusting 10% white will affect 5% thru 15%.

At least that is what I understood from what the guys at spectracal told me.


Athanasios

[AVphile]

I hate what 21-point Autocal does to 5%. I wonder if it would support 20-point just the same but skipping the 5% and let the interpolation at 10% take care of it.