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Best way to feed 720p/1080i to a Marquee 8500?

1839 Views 55 Replies 13 Participants Last post by ChrisWiggles, May 28, 2006

dloftis

Discussion Starter · May 10, 2006

From a DirecTV HR10-250.

It has HDMI or component video outs... would I be better off getting a DVI card and doing HDMI-DVI from the receiver to the projector, or going with some kind of transcoder to go from the component to RGBHV?

If the latter, can anyone recommend a transcoder that supports 720p and 1080i?

Or, maybe I'm crazy - can the Marquee 8500 take component? If so, is it recommended?

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1 - 20 of 56 Posts

RolfHult

· #2 · May 10, 2006

The Moome DVI/HDMI input card for the Marquee works very well!

dloftis

Discussion Starter · #3 · May 11, 2006

Thanks for the reply Rolf.

Anyone else want to chime in here?

Prehjan

· #4 · May 11, 2006

I also use the moome card...from what i understand if you need internal scalling there is also the momjong card...

Martin

dloftis

Discussion Starter · #5 · May 11, 2006

Here's another question then - I also want to be able to connect my Xbox (not 360) from timem to time. It's component only, 480i/p, 720p, 1080i. How would I do that?

Thanks!

RolfHult

· #6 · May 11, 2006

The Moome adapter got component in also.

dloftis

Discussion Starter · #7 · May 11, 2006

OK, Moome adapter it is then.

Thanks!

dloftis

Discussion Starter · #8 · May 11, 2006

One more question for you guys - how would I switch inputs on the Moome interface? Does the Marquee see the component and DVI inputs as two different inputs?

GEBrown

· #9 · May 12, 2006

Quote:

Originally Posted by dloftis
One more question for you guys - how would I switch inputs on the Moome interface? Does the Marquee see the component and DVI inputs as two different inputs?

Moome's card automatically switches from Component to DVI depending on which one has a signal. There is a switch on the faceplate of the card to tell it which one you want to be primary. So, say you mostly want to use the DVI port, but then have it automatically switch to component for your XBox, then you would set the switch so that component is the primary.

HTH

Prehjan

· #10 · May 25, 2006

If you do endup ordering one ...Make sure you check the jumper settings before you put the card in...one setting has lower voltage requirments...that is teh one you want!

Martin

Robert Zuch

· #11 · May 25, 2006

Dloftis, the very best way to connect your HR10-250 to your projector is to use the broadcast high definition digital format. This is a substantial improvement over both DVI and analog connections, especially with a CRT projector. The picture has more detail, punch, 3-dimensional look and more accurate colors. The downside is this is quite a bit more expensive.

Robert Zuch

Reference Imaging

madpoet

· #12 · May 25, 2006

Umm... what? Robert, the HR10-250 can either do component or HDMI. It's an HD Tivo for DirecTV. What the heck are you talking about?

CaspianM

· #13 · May 25, 2006

He might be talking about HD SDI.

madpoet

· #14 · May 25, 2006

I don't think you can mod the Tivo with HD-SDI, but I could be wrong. And even then you'd have to get an HD-SDI inout card, and Casper hasn't finished them

.

dloftis

Discussion Starter · #15 · May 25, 2006

Quote:

Originally Posted by Robert Zuch
Dloftis, the very best way to connect your HR10-250 to your projector is to use the broadcast high definition digital format. This is a substantial improvement over both DVI and analog connections, especially with a CRT projector. The picture has more detail, punch, 3-dimensional look and more accurate colors. The downside is this is quite a bit more expensive.

Robert Zuch

Reference Imaging

You've piqued my interest... now show me how to do it

Robert Zuch

· #16 · May 25, 2006

We have a HR10-250 in our showroom and have compared different ways to connect to CRT projectors. For best picture quality we use broadcast-grade equipment with the existing outputs on the HR10-250 as well as other sources. We convert the video signal to HD-SDI and then back to RGBHV at the projector. The connection is a single coaxial cable and very long run lengths can be used maintaining the best picture quality for high def. signals. The difference is huge compared to DVI or HDMI.

We have tested many different types of equipment/manufacturers for the signal conversion, cables, etc. Our approach will vary depending on the specifics of the system. I can't go into much more detail but if someone is interested PM me your system info/email address and I can make suggestions.

Robert Zuch

Reference Imaging

dloftis

Discussion Starter · #17 · May 25, 2006

Quote:

Originally Posted by Robert Zuch
We have a HR10-250 in our showroom and have compared different ways to connect to CRT projectors. For best picture quality we use broadcast-grade equipment with the existing outputs on the HR10-250 as well as other sources. We convert the video signal to HD-SDI and then back to RGBHV at the projector.

So you're not actually getting HD-SDI directly from the DVR, you're taking the component or DVI outputs and using an external converter to make that HD-SDI?

madpoet

· #18 · May 25, 2006

You are taking the standard output of the HD Tivo. There's only so much you can do with it at that point. The signal has already passed from a digital to analog form if you're using component. I'd believe there was a significant advantage if you had managed to add an actual HD-SDI output to the Tivo itself, but since you haven't then the internal processing of the Tivo has already occured. Yes, you can feed it it a professional grade scaler or something to perform the transcoding and possibly even manipulate the image quality itself. But it's not like it was the pure SDI output to start with.

And let's be real clear... it's D*. You're working with bit-starved 1280x1080 (at best) signals to start with. I just can't believe the difference is that huge.

Robert Zuch

· #19 · May 25, 2006

That's because you haven't seen it.

There is a tendency to make decisions based on theory. We have been led to believe by the manufacturers that digital is better than analog. So it seems to make sense that an all-digital DVI or HDMI connection would be best. But the reality is that DVI and HDMI are low cost formats designed for consumer electronics. The cost to add these inputs/outputs must be kept very low; these are mass market items. These formats often give acceptable picture quality when driving a digital display, but lack considerably when driving an analog display (e.g. CRT). One of the shortcomings is the D/A conversion of the DVI signal. Timing jitter in the DVI signal results in inaccuracies in the analog RGBHV signal which feeds the CRT projector.

Just a few years ago D/A and A/D conversion were not transparent, often introducing subtle distortions except for the most expensive converters. Now top quality conversion is available at much lower cost. If the proper equipment is selected, these conversions are now competely transparent. If the digital format being used is accurate and robust (e.g. SDI) then best picture quality can be achieved. The DVI/HDMI implementations are much too limiting for reference quality images.

Robert Zuch

Reference Imaging

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dloftis

Discussion Starter · #20 · May 25, 2006

Robert,

So are you taking analog out of the STB? If so, you're relying on the crap mass market D/A converters that you're talking about. If you were to take DVI/HDMI out, and then convert it externally to some other format (be it RGBHV or HD-SDI, etc) then you'd actually be bypassing any cheap mass-market A/D processes altogether. What am I missing?

I'm not disagreeing with you that different ways of doing things can make for a better picture... just trying to understand your point of view.

1 - 20 of 56 Posts

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