toad@nl.cs.cmu.edu (Todd Kaufmann) (12/17/88)
I'm looking for a/some simple circuits for decoding closed caption info from the `dark area' of the video image which is generally available from video signals. Pointer to articles in generally available magazines/books would be probably be best. Detailed descriptions of the video signal helpful too (do SMPTE reference books exist & have this?). Where's the best place for an enterprising video experimenter to start from? The best thing would be the video equivalent of radio's ``ARRL handbook''. How about companies that sell simple kits to get one started in such things? Cheap, education video effect boxes would be fun too---something like inverting color signals (i'm easily amused). Time to take apart the set... Please send mail; I'll summarize if there's enough interest. -todd-- internet: toad@cs.cmu.edu us snail: Pobox 81795-UN, Pittsburgh PA 15217 (mail-art exchange) ``In Xanadu, to be an individual one must be a clone.'' -future proverb --
sef@druco.ATT.COM (Scott E. Farleigh) (12/19/88)
Please post the source of said circuitry. Thank-you Scott Farleigh AT&T IS Denver
markz@ssc.UUCP (Mark Zenier) (12/20/88)
In article <3887@pt.cs.cmu.edu>, toad@nl.cs.cmu.edu (Todd Kaufmann) writes: > I'm looking for a/some simple circuits for decoding closed caption info from > the `dark area' of the video image which is generally available from video > signals. > ... > How about companies that sell simple kits to get one started in such things? > Dick Smith Electronics had both closed caption and Videotext decoders. See Radio-Electronics November 1986 for the closed caption decoder, April 1986 for the videotext decoder. Does anyone know if any of these kits are available in the US? > Cheap, education video effect boxes would be fun too---something like > inverting color signals (i'm easily amused). See Radio-Electronics September 1987. Mark Zenier uunet!nwnexus!pilchuck!ssc!markz markz@ssc.uucp uw-beaver!tikal!
dmt@ptsfa.PacBell.COM (Dave Turner) (12/21/88)
In article <1595@ssc.UUCP> markz@ssc.UUCP (Mark Zenier) writes: > >Dick Smith Electronics had both closed caption and Videotext decoders. >Does anyone know if any of these kits are available in the US? > Dick Smith is back in business in the US. Some outfit in Indiana bought the US distribution rights. There is an ad in the latest issue of 73 magazine; send $2.00 for a catalog.... -- Dave Turner 415/542-1299 {att,bellcore,sun,ames,pyramid}!pacbell!dmt
dclaar@hpcupt1.HP.COM (Doug Claar) (12/22/88)
> See Radio-Electronics November 1986 for the closed caption decoder,
If this is the one I saw (the time sounds right), all it was was a
power-supply circuit for a black box closed caption decoder, which
you purchased commercially. And it took two issues for the "construction"
article. Oh yes, there were about 3 lines of theory in the whole thing.
At the time, I was pretty upset, because I really wanted to know how
the thing worked.
Doug Claar
HP Computer Systems Division
UUCP: mcvax!decvax!hplabs!hpda!dclaar -or- ucbvax!hpda!dclaar
ARPA: dclaar%hpda@hplabs.HP.COMdmt@ptsfa.PacBell.COM (Dave Turner) (12/22/88)
In article <4624@ptsfa.PacBell.COM> dmt@ptsfa.PacBell.COM (Dave Turner) writes:
The Dick Smith ad is in the Dec 1988 issue of Ham Radio.
The address is:
Dick Smith Electronics
Sherry Blum, Catalog Subscriptions
P.O. Box 468
Greenwood, IN 46142
Phone (317) 888-7265
FAX (317) 888-7368
The catalog costs $2.00.
--
Dave Turner 415/542-1299 {att,bellcore,sun,ames,pyramid}!pacbell!dmt