A few comments:
>* S-video. A huge improvement over composite, but still has some
>compromises. Not good enough for HD or probably even 480p DVD.
Yes and S-Video has one further disadvantage: Since Y/C are on
seperate cables, you have to painfully be aware that different
cable lengths will introduce a delay within Y & C which will degrade
>This seems to usually refer to YCbCr or YPbPr (same thing??),
Basically yes.One refers to progressive and the other to interlaced.
I don't recall which is which tho
>but NOT RGBHV. High quality signal transfer. I believe this is the native
>data format for DVDs, though I don't know why they chose it instead of
Simply a question of $$$. Using pure RGB would mean that you couldn't
fit a film on a single DVD.
>your projector only takes RGBHV (which many do) then you need RGBHV.
Once again: Any PJ MUST convert to RGB at some time in the video
chain as there are only R G B output devices (tubes).
>Some also use RGB with sync on green,
This is written RGsB
>or RGBH/V (?) with one sync line.
This is written RGBs
So you can easily identify what the PJ supports.
> This requires expensive (usually >$500) or low-quality transcoders.
Correct. You don't want to skimp on a transcoder since it is directly
"fooling" around with your PQ.
>* VGA. Used to feed computer monitors, but I believe it contains RGBHV
>signals on some of its pins? So if you have a VGA output you could use it
YES from a compatability standpoint. NO from the electrical driving
capabilities of the output stage. A VGA card was never meant to drive
a parasitic capacitive load (your long video lines).
>* DVI-I and DVI-A. I'm not clear on the difference.
No, they are called DVD-D and DVD-I. DVD-D ONLY contains the digital
signals, whereas DVD-I has BOTH analog & digital. Most of the analog
signals are in the seperate 5 pin "subsection" of the connector.
> DVI-I can also easily be converted to VGA or RGBHV.
No. DVD-I CONTAINS analog RGBHV, so there is no conversion
> Are there any other cables I should run to the projector mount while the
> walls are open?
That depends on the PJ and your wishes
An Electrohome can be
controlled via RS-232. You can also save your internal PJ settings via
RS-232 (I added this line to my runs) If you will be running a switcher,
and wish to control the switcher (if possible!) via the PJ remote, you'll
need another cable. IF you ever plan on adding an additional input
board to your PJ, you'll need more cables. If you have a motorized
screen and want to control it via the PJ: another cable
Here is a
brief list of what I have running through the walls:
- RGBHV #1
- RGBHV #2
* are just for quick connects of standard equipment. I don't plan on
getting PQ through these ;o)) OBTW: I'm running a 8500 (later Ultra).
>play any SD sources (VHS tapes or cable/OTA signals), you'll also need a
> doubler / deinterlacer / scaler.
Yes, this is one point where I'm still deciding on
I have it narrowed
1. Cinemateq Picture Optimizer Plus
2. IScan HD
3. CenterStage CS-2
From here it gets harder to decide. All of the above will require an
additional switcher for my case as they only have one RGBHV output
(and I need two)
> The Momitsu handles this for DVDs, but you can't feed other signals into
> it for scaling, since it does all its work with the digital DVD signal.
Correct. If/when I get one of the video processors above I will be
testing the Momi via DVI-D to compare PQ to the internal scaler.
>Cheapest scaler I know of is the TVone XGA theater, which scales up to
> 1024x768 for $149. I have no idea what its quality is, but you'd be
> feeding it fairly low-quality signals anyway.
While I don't know the above I DID buy a cheapo scaler similar to
that one about 10 months ago. It SUCKS. Its just sitting in its box
and collecting dust until I pawn it off on ebay.
>already shelled out for, you also need to drop another $500-1000 on
> a transcoder and scaler? Plus maybe a switcher of some kind?
Yes (double that figure roughly) and DONT forget the screen, either.