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4 posts

Wannabe Geek


#79509 18-Mar-2011 09:32
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Hi All,

Just signed up here to hopefully find an answer.

I am needing to convert a VGA signal into a DVB-T channel, I want to show a live webpage on a digital channel.

I have had no luck so far finding a solution, anyone here ever done anything like this? Or know anything about it?

Many Thanks,
Adam

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  #449504 18-Mar-2011 10:25
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Maybe you can explain in more elaborate terms exactly what you wish to do. Given the odd technology chain my guess is that all you what to do is display a webpage on a TV screen? If so, this certainly doesn't involve DVB-T.




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Wannabe Geek


  #449507 18-Mar-2011 10:35
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Not just to display it on a TV, but to integrate it into a TV distribution system for the viewing of over 1000 TV's.

So it would be required as  DVB-T channel, so it can just scan in just as other freeview channels would do.

 
 
 
 


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  #449513 18-Mar-2011 10:56
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What's your budget for this?

Have you actually looked at Google? A quick search shows a number of different hardware solutions.




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Wannabe Geek


  #449518 18-Mar-2011 11:00
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There is no budget on this project, it will be as much as it costs.

I have searched all results on google, no hard findings. One company I found, however they have discontinued the product.

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Master Geek


  #450021 20-Mar-2011 12:20
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A graphics card with composite output and an RF modulator might do the trick because DVB-T tuners can also pickup analogue signals, not sure if you want high quality tho?

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  #450066 20-Mar-2011 16:56
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composite and RF analog will be useless for VGA onto a HDTV.

I know a friend was looking for a way to get DVB modulators for the inhouse feeds at a property they are involved with the bodycorp with.

Seems it should be quite simple - mpeg2 or 4 encoder and then a modulator, but no, cant find anything.

I have seen ATSC units around, but obviously they would be useless here, but it proves that there is a market for the idea.




Richard rich.ms

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  #450078 20-Mar-2011 17:57
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adamcollier: There is no budget on this project, it will be as much as it costs.

I have searched all results on google, no hard findings. One company I found, however they have discontinued the product.


So, you are referring to the DVEO product??




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  #450086 20-Mar-2011 18:38
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I would have thought there would be quite a market for a device that did this. Places like Hotels/motels, clubs and pubs would find it quite useful as well I think (think injecting a Sky Channel or 3 into the DVB-T feed so you don't have clients/guests having to switch between Analogue and digital).

I wondered about this a couple of months ago when I was replaceing a TV in a lodge which had built in freeview, but their Sky feed was analogue.

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  #450093 20-Mar-2011 19:21
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trig42: I would have thought there would be quite a market for a device that did this. Places like Hotels/motels, clubs and pubs would find it quite useful as well I think (think injecting a Sky Channel or 3 into the DVB-T feed so you don't have clients/guests having to switch between Analogue and digital).

I wondered about this a couple of months ago when I was replaceing a TV in a lodge which had built in freeview, but their Sky feed was analogue.


Hotels / Motels all use RF modulators to feed all their channels into a RF feed It's cheap and works, but obviously limits the quality of the picture that can be delivered these days.

DVB-T encoders are available but the cost for such a unit doesn't stack up. I was discussing this very thing with somebody a few months ago who mentioned several options including some Promax gear that's apparently very good but at NZ~$6000 or so for a 4 channel encoder vs a few hundred $ for analogue RF most people aren't going to be interested.


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  #450133 20-Mar-2011 20:53
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Anyone know what manufacturers have as far as plans for dropping the analog tuner and composite video processors in displays? I imagine that once that happens then someone will come to market with a decent solution. IMO a USB box with a RF output and software to take the VGA, encode it and push it out shouldnt cost too much.




Richard rich.ms

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  #450136 20-Mar-2011 21:01
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richms: Anyone know what manufacturers have as far as plans for dropping the analog tuner and composite video processors in displays? I imagine that once that happens then someone will come to market with a decent solution. IMO a USB box with a RF output and software to take the VGA, encode it and push it out shouldnt cost too much.


You don't even need a VGA input - you can just feed the encoder an IP stream direct from a PC.




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Wannabe Geek


  #450239 21-Mar-2011 06:37
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Spyware:
adamcollier: There is no budget on this project, it will be as much as it costs.

I have searched all results on google, no hard findings. One company I found, however they have discontinued the product.


So, you are referring to the DVEO product??


Correct.

I Have tried converting VGA into COMPOSITE then into DVB-T using a cheap modulator, but the picture quality is poor, it struggles to handle the resolution.

I need it to be high quality, and DVEO do the perfect product however no longer manufacture it.

There MUST be something out there which is exactly what I need, it's just a case of finding it.

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  #450248 21-Mar-2011 07:52
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sbiddle: 
DVB-T encoders are available but the cost for such a unit doesn't stack up. I was discussing this very thing with somebody a few months ago who mentioned several options including some Promax gear that's apparently very good but at NZ~$6000 or so for a 4 channel encoder vs a few hundred $ for analogue RF most people aren't going to be interested.



http://www.promax.es/ing/products/fichaprod.php?product=MO-170 

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  #450254 21-Mar-2011 08:07
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Promax gear that's apparently very good but at NZ~$6000 or so for a 4 channel encoder


And thats just the COFDM modulator, you still need to mpeg encoder to get an ASI stream, then a multiplexer to glue it all together.

Cyril

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  #450255 21-Mar-2011 08:30
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cyril7:
Promax gear that's apparently very good but at NZ~$6000 or so for a 4 channel encoder


And thats just the COFDM modulator, you still need to mpeg encoder to get an ASI stream, then a multiplexer to glue it all together.

Cyril


I think the unit the person I was discussing it with was referring to is the Promax DT-504. It has composite inputs and multiplexer built in. One site is selling it for US$3976.


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