1. Home
  2. Electronics Design
  3. analog to digital video

analog to digital video

Posted a few minutes ago, but the subject, and the questions, were not a precise as I should have made them, so if you picked that message up in the two minutes it was posted, I am sorry to have misled.... :-)

Meanwhile:

This is a rather generic question, as the standards, and final requirements, are not really well defined for me to deal with at the moment.

A company I sometimes work for, sells character generators. They are analog output, and of course, in the broadcast world, that is not very appealing any more.

I am researching alternatives to some very expensive "black box" solutions that they have been offered, to convert the CG analog output, to digital video. . These boxes they have used, are overkill, and include audio channels, which do not apply to the CG application in its broadcast application.

Many head ends are using these kinds of 'black boxes' as a solution to the fact that they do analog commercial insertion, while the broadcasters are quickly moving to digital delivery. A stopgap method, but a popular one nonetheless, at this point in the changeover.

I know there are many standards for DV. Just a generic question

What I am searching for, is information and ideas as to how to create our own 'black box' that only converts video, more of a custom solution. The management is convinced this is doable, and so I have been tasked with finding out how to proceed.

Its not my field of expertise, being an analog video engineer, but I think if I can find the basic requirements of the circuits, and hopefully the IC building blocks, I could handle it, or at least help provide them with a direction, even if I am able to do the job.

Again, rather a generic inquiry, as opposed to all the dirty details. Can anyone point me to a source for such components, or discussions on this issue?

Just hoping to get a road map, to find out how to proceed.

Thanks very much for any suggestions or references.

John

Reply to
John
Loading thread data ...

Have a look at the TDA8754 from NXP (was philips). It is only 8 bit, and I think lots of video is 10bit now, then you will need someone to program a micro to control it, followed a smpte encoder, possibly, gennum or national do them

martin

Reply to
martin griffith

Well lets see, first how is the sync handled in the digital interface? Second, since the resolution is higher you will want to use more pixels (rows and columns) for your characters. Third, cut away the analog video portion and substitute a digital mux (if video bleed through is desired use adders). Then match the interfaces and the crying is over.

--
 JosephKK
 Gegen dummheit kampfen die Gotter Selbst, vergebens.  
  --Schiller
Reply to
joseph2k

I do not know....

I'm sorry, I didn't realize anything I said was crying. I am just wanting to know if anyone can point me to where to go to find the information, and hardware I might use, to see how this can be done...

Thanks,

John

Reply to
John

You need to open up the box, find out what ics drive the analogue output, and if they are not custom, look at the apporpriate data sheets, and figure out how to serialise the signal

martin

Reply to
martin griffith

Your management was doing the crying. Use your loaf.

--
 JosephKK
 Gegen dummheit kampfen die Gotter Selbst, vergebens.  
  --Schiller
Reply to
joseph2k

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.