How to overlay data onto a TV?

Forums › Home Theatre (including HTPC and EPG Collector) › How to overlay data onto a TV?

stuffed

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Ultimate Geek

#31739 29-Mar-2009 09:49

Anyone out there know of an easy way to overlay data onto a TV picture – have an front door camera piped round the house TV’s via the aerial (RF) system and would like to superimpose the time and temperature if it is not too damn difficult!

Many thanks

Why work on Wednesday and stuff up 2 good long weekends

sbiddle

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#203974 29-Mar-2009 13:29

Where do you plan on getting the time and temperature from?

stuffed

288 posts

Ultimate Geek

#204005 29-Mar-2009 16:51

If via a PC - not prob for the time - if not - a date and time generator and the temp via a txt file - ex a weather station.

Why work on Wednesday and stuff up 2 good long weekends

nate

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#204055 29-Mar-2009 20:52

stuffed: Anyone out there know of an easy way to overlay data onto a TV picture – have an front door camera piped round the house TV’s via the aerial (RF) system and would like to superimpose the time and temperature if it is not too damn difficult!

I know a professional grade video mixer will do this, whether you can find a cheap basic one in your price range to do it is another story.

paradoxsm

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#204076 29-Mar-2009 21:54

I had these little boards from some UK supplier that did just that and were just a PIC, a video overlay chip and an RTC. Unsure how you would do the Temp though but Im sure you could contact the supplier and ask.

They were not cheap however.

I THINK it was this company, The board I have looked much more prototypey.

http://www.icircuits.com/prod_osd_main.html

stuffed

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Ultimate Geek

#204108 30-Mar-2009 08:55

Thanks guys - will follow through with this company and see what they come up with.

Why work on Wednesday and stuff up 2 good long weekends

sbiddle

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#204115 30-Mar-2009 09:03

The cheapest way would be to find a 2nd hand Amiga 500 with a Genlock - problem would be finding one!

stuffed

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Ultimate Geek

#204116 30-Mar-2009 09:07

I take it these units are broadcast ones? If they are do you know of anyone who deals in this type of gear?!
Thanks

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richms

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#204303 30-Mar-2009 20:51

There are a few projects online where people have got a general purpose microcontroller and a sync detector to do crude overlay on a live video signal. One was in a rocket cam that I recall.

Otherwise there are chips dedicated to it, DSE had a kit many moons ago with the chip and supporting components to drive one off a parallel port. I had one but it has being turfed out. Perhaps you could look into the ybox2 project for a starting point and then just get a cheap composite quad splitter to let you put the output of it into one quadrant of the screen?

Richard rich.ms

nzwogboy

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Master Geek

#204537 31-Mar-2009 21:09

paradoxsm: I had these little boards from some UK supplier that did just that and were just a PIC, a video overlay chip and an RTC. Unsure how you would do the Temp though but Im sure you could contact the supplier and ask.

They were not cheap however.

I THINK it was this company, The board I have looked much more prototypey.

http://www.icircuits.com/prod_osd_main.html

The OSD-232 on this website looks like it would do the trick $99USD