On Tue, 28 Nov 1995, Paul Christenson [N3EOP] wrote:

> Is the PIC fast enough to be useable as a character generator to overlay
> text/graphics on NTSC video?  About 10 chars/line is all I need; nothing
> fancy.  (I want to overlay date/time on a camera feed.)
>

Hi,
Other postings have suggested that this is possible, and I don't doubt
it.  However, ther is a lot to think about in terms of maintaining sync
with the video signal.  There is a chip made specifically for this (I'm
afraid I don't know much about it though).  There was an article in (I
believe) Radio Electronics-Electronics Now about using this chip a few
years ago.  The chip had all the timing circuitry built in and took
serial data (ascii text) to send the character to be displayed.
think using this chip in conjunction with the PIC as a source for the
serial character data might be a simpler way to do the job.  At the
least, you could use this chip to get a working system you could reverse
engineer for your final project.  Just my two cents.  Good luck.

morris beverly    avpres@world.std.com