Converting VGA to DVB-T

Forums › Freeview (DVB-T/DVB-S) › Converting VGA to DVB-T

adamcollier

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#79509 18-Mar-2011 09:32

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

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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adamcollier

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#449507 18-Mar-2011 10:35

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.

sbiddle

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#449513 18-Mar-2011 10:56

What's your budget for this?

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

adamcollier

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#449518 18-Mar-2011 11:00

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.

Speedy885

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#450021 20-Mar-2011 12:20

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?

richms

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#450066 20-Mar-2011 16:56

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.

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Spyware

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#450078 20-Mar-2011 17:57

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??

trig42

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#450086 20-Mar-2011 18:38

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.

sbiddle

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#450093 20-Mar-2011 19:21

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.

richms

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#450133 20-Mar-2011 20:53

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

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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adamcollier

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#450239 21-Mar-2011 06:37

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.

illicit

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#450248 21-Mar-2011 07:52

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

cyril7

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#450254 21-Mar-2011 08:07

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

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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