Spent several hours last night calibrating TB1 mode for both my HTPC (DVI/HDMI cable feeding 720p) and my Xbox 360 (component cable feeding 720p, but 480p for the GetGray as I don't have HD test patterns and that's how the 360 works).
Also worth mentioning is I use a 106" Carada BW screen, and the projector is 15' away.
I used the Pantone Eye-One LT probe with HCFR software & GetGray patterns. I used the 709 colour reference setting as most of what I watch is HD material, but this does cause a problem (see section "What's left to do").
I used the RGBCMY calibration, rather than the RGB calibration. I had previously been running with a calibrated RGB only for both components, but as mentioned in the Cine4Home review, the colours were oversaturated, so I decided to go further with the RGBCMY calibration.Calibration Method:
1. Gamma: Multiple Grayscale readings to adjust gamma curve (achieved Gamma of 2.26 for HTPC & 2.23 for 360).
2. Overall Colour: Read 75% white window and adjusted overall colour setting until Red showed as 21% of the white reading.
3. Grayscale: Adjusted Colour Temp and Skin Tone settings while doing continuous readings and looking at grayscale until dE was the lowest from 40-100 IRE.
4. Colourspace: Adjusted each RGBCMY Hue and Saturation setting while taking continuous readings and looking at the CIE chart. Dial-in each colour to the best reference triangle areas. This is tricky, for as each colour was dialed in I also looked at the continuous data readings and readjusted Saturation onthe currently calibrated colour so that I achieved the best compromise for each colour's % of reference white at 75%, which is the following:
Red = 21% of reference white
Green = 70% of reference white
Blue = 8% of reference white
It's important to note that I never compromised a good placement on the CIE chart for more accurate colour balance on the data readings, since for green these two were in conflict.
5. Final adjustments: Performed a complete grayscale, primary, and secondary set of measurements and made minor adjustments where needed.Results:
The result is a colour space pretty much dead on D65 and a grayscale with a dE of about 4 from 40-100 IRE, so I'm ecstatic about the results. I'll post my chc files later to this post.
However, I really do have to get used to D65. The colours are severely unsaturated compared to what I have been watching up until now.
The other thing I now notice much more with the properly calibrated projector is a substantial increase of noise/grain in the picture. This must be a result of the largely reduced saturation in colours (my colour is at -5, with most individual RGBCMY colour saturations averaging about -90). Any explanation here would be appreciated.Projector Settings:
I'll post my complete settings later by editing the post, but here is what I can remember off the top of my head:HTPC:
White Level = 13
Black Level = -5
Colour = -5
Tint = 0
Colour Temp = 5500K
Skin Tone = 3
DVI Level = Expanded
White Level = -4
Black Level = -3
Colour = -5
Tint = 0
Colour Temp = 6000K
Skin Tone = 3
Setup Level = 0%
Eye-One vs Spyder2Express:
The Eye-One is more accurate through the IRE, and especially in the 20-40 range.
For me it's well worth the extra expense, mainly because I'm obsessed with properly calibrated display devices
It also takes much faster readings than the Spyder for the 40-100 IRE range, and slightly slower for the 0 to 40 IREs when you choose "Average many readings for dark" setting in HCFR.
Whats left to do:
1. Enjoy the beautiful picture of course, but also I need to find some good settings from these 2 component calibrations for my Sonicview 8000HD FTA receiver, which of course I cannot play test patterns on. Best I can do is record the HDNET patterns and adjust white, black and colour and tint.
2. Rec 709 vs 609: On the 360, the GetGray patterns are displayed on in 480p rather than 720p, as the 360 sends it this way. Since I don't have HD patterns like DVE HD (just came out), I cannot calibrate properly for 709, even though that's the setting I used in HCFR even though the 360 outputs the patterns in 480p. I think I will create two settings, one calibrated at 709 and 609 to see if it matters for HDDVD material. Any advice on this would be appreciated.