Originally Posted by glenned
I had a different experience with the RCP. I was able to target the primaries and secondaries using the RCP. I had to make adjustments in each color's "targeting" (this might not be the exact word used in the Sony menu) and "range" before the hue and saturation controls worked as expected. Even at that, they did not respond in a strictly linear fashion as one would wish. However, I was able to move all six colors to coincide with the rec 709 standards (at least according to an Eye-One Pro spectrophotometer).
I had the same experience as you in setting the colorspace from "Wide" to the "Normal" setting. It moved their positions a very small amount in color space, not enough to see movement in their positions in a CIE chart.
I sent the Ruby's HDMI input a 480i YCbCr signal with the Accupel and with an HDMI DVD player. I didn't have an HDMI cable so I used a DVI cable with HDMI adapters on both ends. In both cases, the Ruby saw the signal as RGB and didn't apply color decoding. I saw no way to force the Ruby to do so. So far every PJ I have tried this with has responded the same way when set to Auto (decoding matrix). (The Infocus SP7200 allows one to specify the decoding matrix and this PJ could be forced to properly decode YCbCr over DVI.) I believe your review said that your Ruby accepted YCbCr over HDMI. I wasn't able to make this work. I am returning with a true HDMI cable to try again, but I doubt that it will make a difference. Do you have any suggestions?
Interesting results with the RCP. I tried all of the RCP controls in various combinations (Position, Range, RCP Color, RCP Hue) and could only make small changes to saturation. Moreover if I remember correctly, the RCP Color control, which had a small effect on saturation had a much larger effect on the intensity (brightness) of the specific color. So even when I moved the saturation a little, it screwed up the intensity of the color making it better to the leave the RCP Color control at its default positions. Remember, that this is really a 3-dimensional issue. You have to get the x,y (or u'v') positions of the colors correct, but the intensity of the colors must also be correct at those positions. Ordinarily when you are working with native primaries only, you get the intensity correct when you set the grayscale to D65. But with these color management systems you usually have to adjust the intensity of the primary and complementary colors independent of the grayscale adjustment.
Anyway, I don't know why this worked for you in a production unit and not for me in a pre-production unit. The fact that the Wide/Normal mode worked the same for you and me, basically changing only the intensity of the primary colors and not their (x,y) positions, makes it even more mysterious. If Sony had "fixed some problem" (quotes since I don't know how they actually intended it to function) that now allows the saturation to be changed independent of intensity, then why wouldn't they be using that to move the primary chromaticity around in the Wide/Normal function, since that is what you really want and that is the way it works in the Qualia 004?
I'll probably take another look at this entire RCP/Wide/Normal functionality in a production Ruby someday, and then report what I find.
With regard to RGB vs YCbCr formats over DVI/HDMI, I wrote in the review,
"The DVI input only accepts digital RGB signals. There is no user selectable YCbCr mode for the DVI or HDMI inputs, although the HDMI input will accept YCbCr signals automatically when connected to an HDMI source."
So there is no way to use YCbCr digital signals with the Ruby unless you have an HDMI source, which will automatically tell the Ruby that it is sending YCbCr signals. That is a silly limitation of the Ruby. As you mentioned, most projectors allow you to manually select YCbCr or RGB signal processing for the HDMI (and possibly the DVI) input. If you don't have an HDMI source, the Auto mode on all projectors should default to RGB (which is what you have seen). It makes no difference if the cable is DVI (with HDMI adapters) or HDMI. They have the same physical (electrical) signals. It is the HDMI communications protocol that carries the information that tells the projector what type of signal is being sent in the Auto mode.