Lumagen RadianceXD - featuring Gennum VXP (!!) - Page 114

Originally Posted by Dave G


What is this, bad analogy day at AVS? Sorry, but we're talking calibration, not exactly the same playing field in terms of technicality or learned skills. It takes a little while to wrap your head around the concepts involved in a calibration, but to compare it to surgery... give me a break.

Originally Posted by thebland

I think the true experts would disagree that the playing field between technicality and learnd experience to a surgeon is not too far off... It belittle's their expertise to say such..

Analogy or not, no DIYer will ever surpass or equal a seasoned veteran in terms of experience, abilities or their sophisticated / expensive equipment. All pieces of the puzzle being equally important.. Ken Whitcomb, William Phelps, Dan Francis, Chris Collins, have made a career of it.. The aforementioned characteristics that make for an excellent calibrator are equally applicable to a top end surgeon as well. That was the analogy's premise. Simply buying an eye, understanding the concepts of calibration are not enough to get to perfection.

But it's a hobby and who says the calibration has to be the most accurate anyways?? So have at it!!!

Originally Posted by BeachComber

I have noticed some different readings using an Accupel Test Pattern Generator and the Lumagen Patterns. There were some pretty significant differences in the IRE patterns, so before I started to work on a monitor yesterday, I measured RGB at 100IRE from the Accupel and the Radiance. I did a full factory reset on the Radiance as well fwiw.

The Accupel was feeding the Radiance - and the Radiance was set to 1080p60. There are more differences than I would like to see - and the difference on the y axis in the Green is 10%....the blue isn't exactly comforting either.

The fL on the green was significantly different as well.

Accupel Red/Radiance Red


Accupel Green/Radiance Green



Accupel Blue/Radiance Blue



To put it bluntly, I am more than a little concerned.

Originally Posted by TomHuffman

I can't reproduce this.

Accupel	x	y	Y	cd/m2
White	0.312	0.328	1.000	53.1
Red	0.644	0.333	0.207	11.0
Green	0.300	0.608	0.708	37.6
Blue	0.147	0.058	0.068	3.6
Radiance
White	0.312	0.327	1.000	52.3
Red	0.647	0.333	0.202	10.6
Green	0.299	0.608	0.712	37.2
Blue	0.147	0.059	0.068	3.5

The only thing I can suggest is ensure that your aim point remains constant and that the test patterns are the adjustable types, which are affected by the configuration's color management settings.

Originally Posted by BeachComber

Hmmm.... I wonder if one of the units has gone bad.

Originally Posted by Doug Blackburn

I didn't measure any (significant) differences between an AccuPel 4000 and a Radiance XD either.

If you are using an AccuPel 4000, keep in mind that if you select YCbCr, the device you are sending it to could very well NOT recognize it as YCbCr and you get very messed up color. So be sure to set the AccuPel to RGB-Video to insure you aren't sending a signal the Radiance isn't recognizing as YCbCr. The AccuPel sends YCbCr but the destination component thinks it is RGB so you get very wrong color (probably worse than what you measured).

I don't remember if I ever checked to see whether the Radiance recognizes the AccuPel's YCbCr as YCbCr or RGB (don't have a Radiance here right now so can't check it). I habitually use RGB-Video for the output mode for the AccuPel so I may not have tried the YCbCr mode before.

AccuPel was supposed to be working on a DVI to HDMI adapter that contains an extra circuit that would send what the destination device needs to see in order to switch to YCbCr mode but I haven't heard anything about that becoming available in a long time.

I don't know if this applies to the AccuPel 3000 or not.

Originally Posted by BeachComber

Thanks.

...
I would state that I did stumble in the settings from a Directv HD DVR (HR2x series via HDMI), for some reason the Lumagen seems to see it as PC instead of Video Color Space. I am still trying to figure out what is going on with that one.

Originally Posted by jrp

Do you mean RGB video werses RGB PC level? This is a manual setting in the Radiance.

YCbCr is always video level for HDMI.

Originally Posted by BeachComber

Why would some of the setting go to RGB PC and others RGB Video after a Factory Reset

Originally Posted by BeachComber

I would state that I did stumble in the settings from a Directv HD DVR (HR2x series via HDMI), for some reason the Lumagen seems to see it as PC instead of Video Color Space. I am still trying to figure out what is going on with that one.

Originally Posted by cal87

My DirecTV HR2x series all output YCbCr 4:4:4, and I have had 3 different versions. Have you checked the video EDID settings?

Originally Posted by BeachComber

Why would some of the setting go to RGB PC and others RGB Video after a Factory Reset

Originally Posted by dsinger

It's been a long time since I saw the Factory Reset settings, but I think the default is RGB PC. My SA 8300 HD input over HDMI is seen as RGB by the XD and I have to set the XD manually to see it as video to get acceptable PQ. If I remember correctly, the XD menu for that setting says something about being needed for some STBs. Don't know whether this is unique to a SA 8300 with Navigator software but the STB when changing from component to HDMI (i.e after plugging in the HDMI cable and switching XD inputs) says it sees the XD as DVI not HDMI although audio is sent over HDMI.

Originally Posted by GetGray

My understand is NO, that idea was canned, or put so far down on the priority list it will never happen. I offered the Black Magic SDI to HDMI adapter at cost for those anyone to try out HD-SDI into a radiance. I think there were 3 people who identified themselves as having a real interest in using HD-SDI, there were no takers on the offer. With that kind of interest, and the lack of HD-SDI sources or companies to do the mods to existing players, I don't see them doing the development. Consider the relatively much much higher number that would want HDMI 1.3, and it's only in beta still. I don't see HD-SDI happening on this box, as much as I personally would love to see it.

Originally Posted by EmoryS

Hello, well I did search for "comb filter" on this thread and nothing came up, so hopefully my question hasn't come up before (I dislike people who ask questions in forums without searching beforehand).

Anyway, a topic in another thread got me thinking about the quality of the comb filter in the RadianceXD. I know this is a bit "old school", but if I ran a composite out from my LD player to the RadianceXD would I get the same level of quality vs. having something like a Entech SVSI-1 taking the composite out of the LD player and providing the RadianceXD an S-video signal?

I know the Entech SVSI-1 is considered to have one of the best comb filters out there, but if one didn't want to have to track one down would the RadianceXD perform as well or perhaps even better?

What are your thoughts?

Originally Posted by Krobar

Is a "Pro" Radiance ith SDI still planned?