building a scan convertor (1 Viewer)

[Carl Longnecker]

I like the iScan made by Silicon Image, but it's a bit too expensive and doesn't support RGB input, so I'm going to build my own with the same components.

The only thing I can't find is an RGB video decoders. I can find plenty of ADC's that are designed for RGB to digital, but they don't put out the right format. I need a video decoder that outputs ITU-R BT.656

Can anyone help me?

- Carl

 

[Mark Larson]

Why not simply build an HTPC?
You can play DVD's with that, scale them however you like, scale and de-interlace cable and satellite material, and even surf the web on a BIG screen!
Plus it'll be less hassle and probably cheaper.
Only disadvantage is that it won't be instant-on and a PC, not a component.

 

[Carl Longnecker]

Because I have an Electrohome ECP 4101 projector /w a video switcher that outpus RGB, and I have yet to see a TV card that has RGB input. So, if I used a HTPC, I'd have to go composite or SVideo, which defeats the whole purpose.
Besides, if I build a good scan convertor for like $100 or less, how many other people do you think would want the plans?

 

[GordonL]

With a HTPC, you connect the VGA output of the graphics card to your projector/switcher using a VGA->BNC cable.

 

[Carl Longnecker]

Um... you're looking at ths from the wrong end. I have to INPUT RGB, not OUTPUT. A VGA output does nothing to help that.

Please, if your suggestion doesn't have anything to do with components for a DIY scan convertor, don't post a reply.

 

[GordonL]

Please, if your suggestion doesn't have anything to do with components for a DIY scan convertor, don't post a reply.

I was going to provide a source until that rather offensive comment...too bad....

 

[Carl Longnecker]

I wasn't directing that at you, per se. That was just a general request because of the large number of HTPC suggestions that people have given me in other forums.

 

[Mark Larson]

ECP 4101?

This post isn't about components, but i fail to understand HOW you're getting the RGB out of the PJ...? Is the PJ a source? ..??..?
You've seriously confused me. I'd appreciate some explanation on what you plan to do. You say you don't want a source going into the display, you want something to help you get something from the display to the source??
Is this a kind of monitor project? ie you want to monitor what's being displayed in the projector at the same time as it is being displayed? (kinda like a loop-through)?

 

[Carl Longnecker]

I am building a scan convertor. I need an RGB+HV to ITU-R BT.656 IC. I haven't been able to find one.
The reason is that I am removing my projector, but leaving my video switcher. I want to take the video output of my switcher, run it through a scan convertor, and hook it up to my 21" VGA monitor.
I do not want a HTPC. If I did this with a HTPC, it would be much more expensive, besides the fact that I have yet to see a capture card that has 5 BNC connectors on the back of it. And Gordon seems to have taken my request for no more HTPC suggestions the wrong way, but there's nothing I can do about that because anything more I can say is just going to start a flame war.

 

[Mark Larson]

Oh, i forgot this was the DIY and Advanced projects forum!
Good luck with this project, because i still only partially understand it - you want to
Now i get it - you want something to help you take a VGA (or RGBHV, whatever) signal, and output S-video or composite, right??? Exactly opposite of what an iScan does. Cool. Now i get it (i think!)
Don't worry about Gordon. People have bad days, people get pissed off.

 

[Carl Longnecker]

Um you have it completely wrong. I want to do exactly what the iScan does, except with RGB instead of YPrPb component video. RGB 15.7khz interlaced in, RGB 31.5khz out.

 

[Mark Larson]

I will say no more, except for www.diyaudio.com .
Using a transcoder is not what you want right?
PS: iScan doesn't take component in.