Question for Greg Rogers (in the correct thread I hope!
You talked about projectors accepting RGB inputs, converting to YCbCr color-space for internal processing and then back to RGB to drive the panels. I didn't realize this, but it makes sense.
Do you know what the RS1/HD1 does with a 1080p RGB signal? With 1080p24, I know that the Gennum in the RS1 frame doubles, so presumably RGB -> YCbCr -> RGB conversion still occurs. But what about 1080p50 and 1080p60? According the Alex Kobayashi (the designer) it's still got to drive the panel at 2x 48p, 2x 50p or 2x 60p. I'm not sure where this processing occurs however.
In short, if I'm feeding 1080p24/50/60 to the RS1 with a Lumagen scaler, would you agree that a YCbCr 4:4:4 feed would minimize conversions (particularly if sources are also YCbCr)?
Edit: I guess (with HDMI 1.2) 10-bit YCbCr 4:2:2 is also possible from the scaler. I wonder what the ramifications would be of feeding the Lumagen 4:2:2 8-bit sources, have the Lumagen upsample to 4:4:4 for 10-bit processing, and then downsample to feed the PJ at 4:2:2 10-bit?