Two Queries: One About Brightness/Gamma and Another Concerning Motion Smoothing... - Blu-ray Forum

IntelliVolume · 01-31-2019, 03:53 AM

First: Would adjusting BRIGHTNESS or GAMMA be the correct way of going about tweaking black levels on a UHD TV? There are some DVDs I play on my Samsung NU8000 that seem to exhibit somewhat noisy, raised blacks (and this is with running some noise reduction on my UHD BD player AND in the display), and I can't seem to make heads or tails of my panel's GAMMA control (in terms of if it's even affecting black levels); I tried lowering the GAMMA one notch from default (on a slider that goes from "-3" to "+3," with "0" being the default in MOVIE picture mode, which I use) but I can't tell if this improved the blacks at all...

Should GAMMA be left alone and BRIGHTNESS be adjusted for perhaps crushing the blacks a bit in a dark room (so they're less "noisy")? I know BRIGHTNESS controls black level, traditionally, on HDTVs, but with these new Samsungs, I read that this control should always be left at the default level of "0"...

Should I drop the BRIGHTNESS to "-1" to see if I get deeper, less-noisy blacks?

My second query has to do with motion smoothing and the system my Samsung uses in this regard -- the system is called AUTO MOTION PLUS, and by default in the MOVIE picture mode, the settings come as follows:

DE-BLUR: 10 (on a scale from 0 to 10)
DE-JUDDER: 3 (on the same scale)

Now, using these settings, I don't get much judder from 24FPS sources (Blu-ray), if any at all, but it does introduce a VERY VERY slight soap opera effect (which I don't mind); that's not the issue, though. What I want to know is, can anyone even speculate why Samsung set up the De-Blur slider to be at MAXIMUM of 10 while making De-Judder much lower?

Here's what I'm more concerned with, though: From my understanding, BLUR REDUCTION systems are supposed to affect 60Hz sources (some sites say this affects VIDEO sources, not those from FILM) and JUDDER REDUCTION systems are supposed to affect 24Hz sources (film) -- but when I watch DVDs as upscaled from my Ultra HD Blu-ray player to 2160p, my TV's incoming resolution ALWAYS reads "2160/60p" (because, I'm guessing, that I don't have my DVD 24FPS conversion set on in the disc player), yet keeping BLUR REDUCTION all the way up to 10 DOESN'T introduce soap opera effect with these DVDs.

The only way I can increase the SOE on this panel is to increase the JUDDER REDUCTION control -- but I don't understand what is going on here. Is BLUR REDUCTION supposed to only affect sources originating in VIDEO, such as homemade files and such? Is that why the control doesn't affect FILMS I watch on Blu-ray AND DVD?

If I am not explaining this right, I'll try again should someone respond to the thread; but I'm trying to figure out what BLUR REDUCTION is actually affecting (again, Samsung turns this control up to MAX by default in my set's Movie picture mode, yet it doesn't seem to be doing anything negative to film playback that I can see) and if JUDDER REDUCTION is the only slider that is affecting FILM BASED playback (DVDs and Blu-rays).

Again: When I watch DVDs as scaled by my UHD disc player, the output resolution reads:

2160p/60

And when I watch Blu-rays as scaled by the player, the TV's resolution reads:

2160p/24

If DVDs are coming in as "60Hz" signals, why isn't BLUR REDUCTION affecting the LOOK of them?

IntelliVolume · 01-31-2019, 04:23 AM

Oh one more thing:

Can I use a THX Optimizer found on a DVD to adjust the user controls of my UHD (4K) display (for SDR content)...or will this yield "thrown off" values because it's a 2160p panel (even though I'm watching upscaled DVDs brought up to that resolution on it)?

01-31-2019, 03:53 AM	#1
IntelliVolume Banned Member since:May 2016	Two Queries: One About Brightness/Gamma and Another Concerning Motion Smoothing... First: Would adjusting BRIGHTNESS or GAMMA be the correct way of going about tweaking black levels on a UHD TV? There are some DVDs I play on my Samsung NU8000 that seem to exhibit somewhat noisy, raised blacks (and this is with running some noise reduction on my UHD BD player AND in the display), and I can't seem to make heads or tails of my panel's GAMMA control (in terms of if it's even affecting black levels); I tried lowering the GAMMA one notch from default (on a slider that goes from "-3" to "+3," with "0" being the default in MOVIE picture mode, which I use) but I can't tell if this improved the blacks at all... Should GAMMA be left alone and BRIGHTNESS be adjusted for perhaps crushing the blacks a bit in a dark room (so they're less "noisy")? I know BRIGHTNESS controls black level, traditionally, on HDTVs, but with these new Samsungs, I read that this control should always be left at the default level of "0"... Should I drop the BRIGHTNESS to "-1" to see if I get deeper, less-noisy blacks? My second query has to do with motion smoothing and the system my Samsung uses in this regard -- the system is called AUTO MOTION PLUS, and by default in the MOVIE picture mode, the settings come as follows: *DE-BLUR: 10* (on a scale from 0 to 10) *DE-JUDDER: 3* (on the same scale) Now, using these settings, I don't get much judder from 24FPS sources (Blu-ray), if any at all, but it does introduce a VERY VERY slight soap opera effect (which I don't mind); that's not the issue, though. What I want to know is, can anyone even speculate why Samsung set up the De-Blur slider to be at MAXIMUM of 10 while making De-Judder much lower? Here's what I'm more concerned with, though: From my understanding, BLUR REDUCTION systems are supposed to affect 60Hz sources (some sites say this affects VIDEO sources, not those from FILM) and JUDDER REDUCTION systems are supposed to affect 24Hz sources (film) -- but when I watch DVDs as upscaled from my Ultra HD Blu-ray player to 2160p, my TV's incoming resolution ALWAYS reads "2160/60p" (because, I'm guessing, that I don't have my DVD 24FPS conversion set on in the disc player), yet keeping BLUR REDUCTION all the way up to 10 DOESN'T introduce soap opera effect with these DVDs. The only way I can increase the SOE on this panel is to increase the JUDDER REDUCTION control -- but I don't understand what is going on here. Is BLUR REDUCTION supposed to only affect sources originating in VIDEO, such as homemade files and such? Is that why the control doesn't affect FILMS I watch on Blu-ray AND DVD? If I am not explaining this right, I'll try again should someone respond to the thread; but I'm trying to figure out what BLUR REDUCTION is actually affecting (again, Samsung turns this control up to MAX by default in my set's Movie picture mode, yet it doesn't seem to be doing anything negative to film playback that I can see) and if JUDDER REDUCTION is the only slider that is affecting FILM BASED playback (DVDs and Blu-rays). Again: When I watch DVDs as scaled by my UHD disc player, the output resolution reads: *2160p/60* And when I watch Blu-rays as scaled by the player, the TV's resolution reads: 2160p/24 If DVDs are coming in as "60Hz" signals, why isn't BLUR REDUCTION affecting the LOOK of them?

01-31-2019, 04:23 AM	#2
IntelliVolume Banned Member since:May 2016	Oh one more thing: Can I use a THX Optimizer found on a DVD to adjust the user controls of my UHD (4K) display (for SDR content)...or will this yield "thrown off" values because it's a 2160p panel (even though I'm watching upscaled DVDs brought up to that resolution on it)?

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