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TV Input Injection

Tags:
  • TV
  • Set-One
  • Computers
  • Graphics
Last response: in Graphics & Displays
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June 4, 2014 12:09:44 PM

I would like to set one channel on my tv get its input from my network/computer. Is there a device that does this?

I have no idea what to ask for or where to start or I would describe what I've tried.

More about : input injection

a b x TV
June 4, 2014 12:18:49 PM

You are wanting your computer as an input, or you are wanting to go to say chanel 75 and there is your computer display?
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June 4, 2014 12:19:48 PM

The second part is what I want - go to say chanel 75 and there is your computer display
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a b x TV
June 4, 2014 12:24:45 PM

Its possible (not cheap but possible) to do it assuming you are getting TV channels via a coaxal f-type connection. They make devices that will turn a digital or analog input and put it onto a channel frequency over the coax cable.

If you have your satalite tv reciever pluged in via hdmi then no, it is not possible to integrate it into your TV channel stream.
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a b x TV
June 4, 2014 12:32:25 PM

Doing so will degrade the quality of the signal in order to modulate it in order to fit in the frequency space of 1 channel.

Now, why are you wanting to put the computer on the coax wire?
Are you wanting everyone in the house/bulding to see the coax stream?
Are you wanting to not have to change inputs?
Or is it just because the computer is in a different room that has a coax jack?
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June 4, 2014 12:34:12 PM

Ok, thanks. Any idea what those devices are called?

On a side note, didn't vcrs work like this? You could just change to channel 3 or 4 and that was designated as your vcr channel. You didn't have to change inputs to watch a movie, just channels.
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Best solution

a b x TV
June 4, 2014 12:40:48 PM

What you are looking for is something like this: http://www.justhdmi.co.uk/modulated-hdmi-over-rf-coax/

Now this type of equipment in professional equipment, not home grade go to your local ____ store and get it, it is high end $2000-4000 equipment.
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June 4, 2014 12:45:50 PM

Perfect - I can't understand why that sort of thing hasn't gotten cheaper, but that's what I'm looking for.
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a b x TV
June 4, 2014 12:58:26 PM

They are expensive because very few people need something like it.

You can get HDMI matrix switches that will distribute multiple sources to multiple locations via hdmi or ethernet cable for a fraction of the cost.

You can also get adapters that will allow you to send the screen of the computer over coax and then a device on the other end that will convert it back to hdmi agian, which while it might sound the same is very different because you are not trying to modulate and convert the data to a cctv channel.

Yes a vcr used to do that but a vcr is an analog device that required very little conversion in order to do it.
You can buy an rf modulator that will turn the old rca inputs and put it on a tv channel for $20-30.
Taking a digital input like hdmi requires a lot of signal processing to then convert it to a tv channel.
Even taking the analog VGA input and converting it to a single output type is much more difficult then what a vcr did.

When it comes down to it, the biggest hurdle is what is called HDCP which is Copywright protection, put in as a standard with DMCA laws. This makes it much more difficult to split and modify signals, so the device has to have the physical ability as well as the legal ability to be able to know what to do with the protected content to get the desired result.
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