Originally Posted by TrevorS
You seem to be interpreting the above HDMI->DVI-D inputs as Toshiba bashing -- it isn't.
There's no reason to spend money on an ISF tech in order to detrmine if there is a problem with delineation of blacks. However, of course, such evaluations cannot be made without taking the time and trouble to perform fundamental black and white level calibration. As far as below black is concerned (0:15), either the player or the display can be incapable of showing that information, and so that is a separate question (and is not inherently related to black crush anyway).
My own HDMI->DVI-D installation does not currently suffer from black crush, but I'm also using the 1.0 firmware release in my G1 player. Based on the experience of others, I have every reason to expect exactly that problem if I install either 1.4 or 2.0. To be sure, I could be wrong given my particular displays, but if I install 2.0 and the problem hits, then I'm stuck because it is not a reversible install.
Even though I don't currently have that problem, I would like to be able to add the newer features, and so I have been following the threads on these issues for some months. It is the experience of others that I'm relaying above, experience I prefer not to bestow upon myself.
PS. If the partial work around you describe above solves your problem, good for you
It's not clear to me who you are directing your response. If it was directed to me, I assure you that I did not interpret your responses to be "Toshiba bashing".
In response to my earlier question, was I correct in my statement that your remarks regarding "erroneously extending the luminous range" was essentially the same issue Larry mentioned when he referred to the "PC RGB conversion bug"?
I see a number of forum members loosely using the term "Black Crush" to describe a condition where the shadow details are lost in dark scenes. I am not well versed on this subject, but it seems to me in some instances such a symptom could be merely the result of mis-calibration of the display, a mis-calibration of the player, or a combination of both, and not necessarily a flaw in either device.
Sometimes the factory "neutral" settings of players may yield a darker picture than the owner is accustomed to seeing on their other DVD players and cable or satellite receivers. As a consequence, they may jump to the conclusion that they have a "Black Crush" problem with their new HD DVD player. When I first starting using my HD-XA2 I also felt the picture looked a bit darker than I am used to. However, I also noticed that images on HDMI to DVI were darker than on component video. This suggested to me that perhaps there was
a problem with the player on HDMI to DVI.
Fortunately, the HD-XA2 player has picture control adjustments that permit performing black and white level calibration of the player without resorting to recalibrating the display and throwing off the calibration for my other source devices. As you are probably aware the HD-XA2 has three sets of user-defined picture settings. In the interim, until it is determined whether there is a colorspace problem with these players on HDMI to DVI, and an upcoming firmware fix, I have been able to calibrate the player using these three settings.
Using the high definition video test signal available on the Studio Canal discs, I calibrated black and white levels for HD DVD on the HDMI to DVI connection using the first set of user settings. I also calibrated black and white levels for HD DVD on component video using the second set of user settings. And finally using the standard definition Avia DVD, I calibrated black and white levels for standard upconverted DVDs on the HDMI to DVI connection using the third set of user settings. Needless to say all three settings are different.
Doing this I find that I can properly set black levels. So it would appear that I do not have a "Black Crush" problem that can't be overcome by calibration of the player. With regard to white levels, I can decrease the contrast so that I can barely make out a line delineating each of the 16 gray scale blocks on the high definition video test signal, but at the whitest two blocks look like they are the same level. I have a very bright DLP projector, and perhaps it has reached it's maximum contrast and that is all that I can reasonably expect regardless of my player. Nevertheless, I find the HD images from the player to be extremely high quality and as good as, if not better, than anything I have seen on HD satellite. I haven't really studied the upscaling, but it appears to be at least as good as my Bravo D2 upconverting DVD player.