RS-343 Video

Thanks Dave

I can’t find a lot about EIA 343 in terms of what exactly the details are. It is a monochrome high definition spec. This is what I did find:

RS-343 was introduced later than RS-170 and intended, according to the title, as a signal standard for "high-definition closed-circuit television", which among other things reduced the signal amplitude to 1.00 Vp-p. The signal specifications according RS-343:

White: +0.714V Black: +0.054V Blank: (0V reference) Sync: -0.286V.

RS-343 specifies a 60 Hz non-interlaced scan with a composite sync signal with timings that produce a non-interlace (progressive) scan at 675 to 1023 lines.

This standard is used by some computer systems and high resolution video cameras. Precision imaging systems, infrared targeting, low-light TV, night-vision and special military display systems, usually operate to high-resolution, RS-343 standards (875-line, 30-frame scan). They require specialized and costly recording and display equipment.

Given that, our parts are, in general, color. You can decode to Y Cr Cb and only use the Y component. There are no scripts available specifically for EIA 343.

I've seen this question before fairly recently.  My understanding is that none of our video decoder parts decode this format.  RS-170, yes but not RS-343.

If you separated the synch off and just fed it into Y, I imagine you could do it using the CP of most of or video decoder parts.  I'm not aware of anyone who has tried though.

Dave

Thanks Hank!

Dave,

I know this thread is over 2 years old, so I'm wondering if this is still the case (that AD "does not" have any RS-343 solution)?  We have a board that is using the ADV7842, so I was hoping that we could tweak that to accept RS-343 (875 line resolution), but another solution could prove interesting. 

Please advise.

Hi Rob,

Nope, we have not made any changes in support for RS-343. There hasn't been any indication that there is enough business out there to justify the development unfortunately.

Dave