The best links I know of on the web are:

http://www.philrees.co.uk/articles/timecode.htm
http://www.inforamp.net/~poynton/notes/video/Timecode/index.html

I made an LTC reader using a 628.  The approach I used was to rotate
the input bits into ten registers until the 16 last bits agreed with
the SMPTE identification bits and then decode the other registers to
HH:MM:SS:FF.
Since both up and down transitions are significant I used the interrupt
on state to read the signal.  I don't know if this is the best way but
it worked for me.

I was toying with the idea of making a LTC generator but was put off by
the fact that this would require a precision of at least 1 frame (1/30
second) in 8 hours (1 part in 864000) and I think this is beyond the
precision of even temperature controlled oscillators.  If I'm wrong
about this I'd be grateful if you could let me know.

Bruce Douglas


Mark Templeman wrote:
> Hi
>
> Does anybody out there in PIC Land have any information about reading LTC Timecode using a PIC.

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