building a scan convertor

Discussion in 'Archived Threads 2001-2004' started by Carl Longnecker, Jun 21, 2002.

  1. Carl Longnecker

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    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
     
  2. Mark Larson

    Mark Larson Supporting Actor

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    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.
     
  3. Carl Longnecker

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    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? [​IMG]
     
  4. GordonL

    GordonL Supporting Actor

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

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    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.
     
  6. GordonL

    GordonL Supporting Actor

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  7. Carl Longnecker

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    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.
     
  8. Mark Larson

    Mark Larson Supporting Actor

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    ECP 4101? [​IMG]
    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?? [​IMG]
    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)?
     
  9. Carl Longnecker

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    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. [​IMG] 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.
     
  10. Mark Larson

    Mark Larson Supporting Actor

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    Oh, i forgot this was the DIY and Advanced projects forum! [​IMG]
    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. [​IMG] Now i get it (i think!)
    Don't worry about Gordon. People have bad days, people get pissed off.
     
  11. Carl Longnecker

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    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.
     
  12. Mark Larson

    Mark Larson Supporting Actor

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    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.
     

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