AVS HD 709 - Blu-ray & MP4 Calibration - Page 98

thanks both, i'll carry on tweaking tonight

i've got a much better result now, seems i had adjusted the gamma by a point somewhere along the line.

almost finished calibrating now and quite happy with the results, but i've got a bit of a rogue value. when reading primary and secondary colours, red has a deltaE of 3.0 and green has a deltaE of 2.9, but blue has a deltaE of 11.7! any idea what could be causing this?

You need to break the DeltaE now a bit, and see what's the issue. It could be saturation, hue, or luminance. Depending on your device, you might have NO CMS (then you can't do anything), some CMS (maybe you can vary luminance..), full 3D CMS (you can change everything!).
For HCFR, not sure if you can break it down into LHS. However, you should at least be able to look at delta luma and see what % is it off by.

i need to check the service menu to see if it has any LHS settings.

but i guess before that, i watched a few programmes with my new settings and for the most part the images were really good, especially CARS on bbc hd, but football and F1 were really poor on the green, they had the neon grass effect!

i've got a discussion in this thread
http://www.avsforum.com/avs-vb/showt...5#post20844025

Lame question about black clipping patternt #1



When I sit in front of tv i can see that 17 flashes but when i look from another angle i can see that 16 bar flashes too - from this angle i took down one notch and 16 dissapeard, 17 still flashes from THIS angle. It's good huh? But...
When I sit in front on tv I cannot see 17 bar, 18-above flashes.

Which settings should i keep?

Sorry for my english, seriosuly if you dont get my point I'll draw for you.

You obviously have an LCD TV and as a result you need to calibrate it directly in front for an accurate result.

Ps, not intending to start a flame war, but this is one reason why ppl in the know prefer plasma tv's!

hi guys, i wanna ask, i've just bought new samsung la32d450 lcd, and i'm never do any calibrating before, my question :

1. may i download this calibrator and play it with usb stick via video player on samsung lcd? my series is able to play movie via usb
2. which one i must download if it can? or if it cannot?
3. is there any different if i play it via cheap dvd, usb stick, hd player, or nice dvd player?

thx u so much for your helping, sorry for my bad english

i found that with the usb version i couldn't display as many bars on the contrast adjustment as i could when using the blu-ray version.

i've downloaded the mp4 version and it's playable at my samsung lcd, but i cannot show blue filter mode when play via usb, must via dvd, maybe i download the disc version

i'm confuse at white clipping, what must be adjusted?

Just tried the AVCHD DVD on my Panasonic DMP-BDT210 Blu-ray player and it works perfectly, including chapter skips and pop-up menus. So no problems with "Known Issue #3".

thanks for this calibration disc

i was wondering, would this work if i make an iso and play this throught my laptop to the tv connected in hdmi?.

Hi guys i have a question, my hdtv is a samsung plasma 3dtv should i calibrate from my standard viewing position or in front the tv?

One problem with doing that is the laptop has it's own graphics characteristics and controls. So, unless it is calibrated to output proper levels via the HDMI your TV may look ok with that result, but not be accurate for other inputs and devices.

There is some controversy regarding input device peculiarities and calibration. I have found that even using the AVS HD709 media on 3 different Blu-ray players renders somewhat different results, even with all player's settings in a "neutral" condition.

Yes, and the only way to be sure is to connect a reference signal generator directly to the same TV input and make a comparison.

Thanks!!!

@alluringreality

Do you plan to release a new version with small window pathes for grayscale and 75% color patterns?

I am not sure but I guess the Panasonic VT30 plasma would require smaller window patches. I think the size of the small APL patterns would be great.

A calibration with large window patterns cuase a diseaster. I didn't had time to try with Small APL but if there will be a next time I would have small window patches on a disc next to me.

I'm trying to calibrate LG 50PK550 with Eye One Display 2 colorimeter using AVS HD 709 patterns.

I'm little confused with Limited RGB vs Full RGB settings.

My setup is: LG 50PK550 plasma connected to HTPC (AMD Fusion E-350 (integrated Radeon 6310)) through Marantz SR5004 receiver (all connected with HDMI).

I can setup black levels on:
1. LG - Low black (16-235), High black (0-255)
2. AMD driver (Full RGB (0-255), Limited RGB(16-235), YCbCr 4:4:4)
3. Renderer (madVR, WMC7, EVR CP...)
4. Receiver (I choose "HDMI through", cannot choose black levels, just hope that it doesn't mess signal)

So, alot of places where something can go wrong
First I tried between Low and High black on LG Plasma. When i choose High, blacks on cable set top box look grey (also connected through receiver). I don't want to change picture mode everytime when i switch between TV and set top box, so I kept setting at Low.

What I thought is when you choose Limited RGB that you can't see flashing bars below 16 on AVS HD 709 patterns, no matter how much you crank up brightness (but I was obviously wrong).

So I played a bit with different settings, the results are:

Black level on tv was always on Low black (16-235), brightness at constant level (46), MP4 pattern Black clipping
a) ATI driver - Limited RGB or YCbCr
1. MPC-HC EVR CP (16-235) - bars 17-25 flashing
2. MPC HC EVR CP (0-255) - no bars flashing
3. WMP 12 - no bars flashing
4. WMC 7 - bars 17-25 flashing
5. TotalMedia Theatre 5 - no bars flashing
6. PowerDVD - no bars flashing
7. MPC-HC madVR(16-235) - bars 17-25 flashing
8. MPC-HC madVR(0-255) - no bars flashing

If I crank up brightness, then i can see bars 2-25 flashing.

b) ATI driver - FULL RGB
no bars flashing in any setup (if I crank up brightness, I can see bars 17-25 flashing)

So, I Think that WMP, TMT and PowerDVD use 0-255 black range (couldn't find settings where you can change this), and WMC7 uses 16-235 range.

So, I'm little confused, shouldn't Limited RGB clip values below 16 black. Or there is some kind of expansion?

What is the "proper" way to connect everything?

99% of time I play 1080P MKV's through WMC7 or MPC-HC EVR-CP.

I think that proper settings are:
1. Limited RGB on TV
2. Limited RGB in ATI driver
3. Limited RGB in renderer

but correct me if I'm wrong (I can also set everything to Full RGB, but then blacks are grey on my set top box).
And if I understood this correctly, my pictures won't be accurately displayed with Limited RGB setting (because they need PC levels).

If someone can clear this mess up for me, I would be very thankful.

Just a small clarification, I measured a two-point gamma as a function of APL on two different displays to show that both panasonics and samsungs exhibit the same behavior. I can measure additional video level response if there is any interest but it wont change my general conclusions. I think measuring gamma using windowed patterns on these displays is pointless because the measured value will depend on the size of the window. Use a constant APL pattern which does not probe your brightness limiter at the high end.

Large APL windows or small APL windows matter?

Not sure if there are any whole screen APL options.

[EDIT] For others who may know as little as I, the answer is large APL. There is a big discussion between alluringreality and zoyd, some of which I thought maybe I could understand but almost none of which I can explain. Except that the answer is the large APL windows in the AVS HD 709 disc, and that this is a "plasma thing".

I can't post the link, sorry. (competing forum I guess)

There was a post earlier in that thread by a pro calibrator that mentioned his preference for an older version of the AVS disc, followed up by an unanswered question about how, or if, the older version can be found. Not sure if this has been discussed elsewhere ..... alluringreality?

I just want to say THANKS to everyone that helped create this excellent bluray calibration disc. I have been using it with my Calman V4 software and i1Pro.

If my TV expects 16-235, and PC is outputting 0-255, what is correct:
a) linear contraction (0 becomes 16, 1~17, 2~18...255=235) or
b) 1-15 and and 235-255 are just thrown away and 16 is mapped to 16, and 235 to 235 (which means that I lost information from original video).


99% of time I use HTPC for video playback, so video calibration is my primary concern.
I'm OK if videos on youtube will play in incorrect colors.

Thanks for your help (and the link)