Originally Posted by mombasa123
Have been having fun calibrating my Samsung ES8000 with the Disney WOW disc and the AVS 709 disk. Have almost got it to a point where I am happy but a couple of things troubling me:
Setup is HTPC with Intel HD Graphics (set to output YCbCr) via HDMI. Tv set to PC mode so a lot of settings like Colour/Tint disabled but all enabled when in 24p mode playing videos. Calibrated on 24ps setting.
1) On the AVS Colour Steps test, the last 4 bright green bars (near 235) are blending together. Nothing I do will make them distinguishable from each other. All the other colours are fine.
2) The Disney WOW Colour/Tint (46/50) setting are slightly different from AVS (48/50)using both the blue filter and RGB only mode. Dont get it.
3) On the multi colour flashing pattern for calibrating Colour/Tint, Blue panel is perfect but Red and Green are slightly off. I use the TV's RGB mode.
Any ideas anyone?
Originally Posted by panetesan2k6
I'm no expert but... I think if you put your TV y "PC mode" it will be expecting RGB 4:4:4 and you are probably feeding it YCbCr 4:2:2. If you want to stick to "PC Mode", my advice would be setting the HTPC to RGB 4:4:4 and using RGB output mode in the player with HQ conversion from YUV to RGB. In the other hand, I would set the HTPC to YCbCr 4:2:2 and set the TV to "normal".
About the color/tint adjustments, I only got that right when I went into "user color" and modified the RGB values for each color.
EDIT: I think you should read this:
Ok, so figured it out and posting here if others have same difficulties.
After reading this link : http://sunmaiblog.wordpress.com/2010/10/06/calibrate-htpc-for-optimal-video-output/
I went back to basics. Set my HTPC to output RGB at a fixed 60p so that the TV stayed in PC mode. Hey presto, the blending greens were not blending anymore – all colours had perfect stepping. Also noticed that the banding I used to have on the Greyscale pattern (which I had ignored before but only realized why the bands cuz of above link) was also much better.
However the setup above left me with a few problems :
1) Colour and Tint were slightly off on the Flashing Blue pattern.
2) Movies etc are filmed at 24p(ish) so not ideal to output at 60Hz to TV.
3) Also all the dynamic and motion control stuff was disabled in PC mode.
Wasn’t happy with this so played around a bit more. Set the HTPC to output 24p with everything else the same. And wow, hey presto suddenly the Colour steps and everything else was perfect. All the previous things I had noticed like Colour clipping suddenly were spot on. Note, the TV recognized that video was being output and automatically switched out of PC mode and into normal mode I guess. Very smart Samsung.
To cut a long story short turns out the culprit was PowerDVD playing the AVS BluRay. It has a setting to switch to the frame rate of the source automatically (in this case 24p). Everytime it does that the TV info shows 24p. But it seems to be a different 24p to the Graphics card 24p. I have no idea. And that was the reason for my issues.
To confirm, I played the MP4 AVS tests through XBMC which also switches automatically. That was perfect too and identical to the BluRay graphics card 24p setting setup.
So next, I decided to recalibrate everything since I had switched the card to RGB (limited btw as the Intel clips). Brightness/Contrast no change to YCbCr but Tint was slightly off on Blue and both colour/tint off on Green and Red flashing patterns. Could get any of them spot on.
Switched to YCbCr and everything was spot on
So I think for a setup like mine (ie Intel HD Graphics), YCbCr is the way to go. BTW if anybody knows what the ‘IT Content’ in Monitor setting does please advise. Can’t find anything anywhere about it.
Very happy bunny now. Well sort off – I have had a lot of fun calibrating and now there’s nothing to do. Guess will have to sit down and watch stuff now
Anyways, for reference here are my settings :
Intel HD 2500 : YCbCr on. IT Content on.
XBMC : Set to auto adjust framerate
Samsung 55ES8000 :
HDMI Mode : PC
Backlight: 14 I like a bright picture. Changing the setting doesn’t seem to impact the calibration unless set to very low and that’s ridiculous.
Contrast: 85 Above 95 I had reds blending in the colour steps test although the actual APL clipping was fine. 90 was good for all but now set at 86 to be safe. Not sure how to get it exactly right.
Sharpness: 2 On my HTPC it seems completely redundant. Plus read that HD material should not require it. But didn’t want to turn it off completely so set at 2.
Color: 48 Perfect match on Blue/Green/Red Flashing using built in RGB mode.
Screen Adjustment submenu:
Picture Size: Screen Fit
Position: [no change]
3D submenu: N/A
Advanced Settings submenu:
Dynamic Contrast: Low It’s there so I figure have to use it
Black Tone: Dark Crushes the blacks fractionally but I prefer the darker black and lose a fractional amount of detail. Note all calibration was done without this and Dynamic Contrast. I turned them on after watching some Movie clips with dark scenes. Went back to the Disney Wow disc and the +1% black was not visible anymore. May change it to off later.
Flesh Tone: 0
RGB Only Mode: Off
Color Space: Auto
Color Space submenu: Disabled
White Balance submenu:
10p White Balance: Off [grayed out]
Expert Pattern: Off
Motion Lighting: Off [grayed out]
Black Enhancer: Off
Picture Options submenu:
Color Tone: Standard I prefer it to the Warm settings
Digital Noise Filter: Off Will lose detail for HD video but have it on Auto for TV etc.
MPEG Noise Filter: Off
HDMI Black Level: Disabled YCbCr setting on Graphics card disables this but had it set on Low (Limited RGB source) for RGB
Film Mode: Disabled
Auto Motion Plus: Standard (personal pref. set to Clear otherwise). I like it.
LED Motion Plus: Off
ECO Sensor: OFF
I haven’t done the CE Dimming workaround yet – am ok with it thus far.
*EDIT* Scratch the bit about PowerDVD using a diff 24p from the video card. I checked again to make sure this was the case. It wasn’t. When I was playing around, I kept on shutting down PowerDVD, changing frame rate on graphics card and then starting PowerDVD and doing a ‘Resume’ instead of ‘Start Again’. For some reason the colours didn’t clip but if I restart the colour clipping test they still clipped. So I think issue is PowerDVD or a combination of the HTPC BluRay player/PowerDVD. Given up on that now.
Also note that the AVS Colour/Tint Setting played on BluRay/PowerDVD (46/50:50) are diff from the AVS MP4 (48//50:50). Disney WOW disc is the same as AVS BluRay/PowerDVD Combo.
Plus, the various colour evaluation tests are a lot worse on the AVS BluRay/PowerDVD combo whereas the AVS MP4 /XBMC is spot on. Shame but since I do most of my viewing on XBMC its fine