>
> Not quite a direct PIC question, but wondered if anyone had
> interfaced any device(s) to generate a video text overlay
> over either NTSC or PAL video? I believe Philips has some
> IC2 devices to do this, but wondered if there was any "real
> world" experince on this list?
>
> Specificially, I'm just looking to display simple text (doesn't
> need to be anti-aliased) over top of video. Of course, it would
> need to be in sync with the underlying video signal.

Go take a read around the www.circellar.com web site. There was a design
contest winner that had a wind speed indicator with video output that used
a single PIC. It probably could be adapted to your overlay project with
the use of a sync detector. In a nutshell:

1) Use the sync detector to detect starts of frames and lines.
2) Use a analog switch that will pass either the regular video or
   pure white.
3) Program the PIC to switch the switch at appropriate times.

I've never done this, as I'm not a video guy, but I think the basic
concept is sound.

Hope this helps,

BAJ