convert VHS to DVD

[Mike McCarty]

Tim wrote:
> Mike McCarty:
> 
>>Actually, usually to remove MacroVision, one needs to *remove* the
>>"extra" sync pulses it puts in. :-)
> 
> 
> It probably would have been best if I'd described the restoration
> technique more accurately:  You replace the syncs signal *and* vertical
> blanking period.  That takes care of almost everything in one go.

Yep, thus effecting black level restoration as well.

[snip]

>>There is a simple circuit which needs a couple of pots adjusted
>>which kills most versions of MacroVision pretty handily. I haven't
>>built it, but I've looked over the circuit, and it should work.
>>
>>http://www.hobby-electronics.info/projects/MacrovisionKiller.html
> 
> 
> Hmm, output stage looks a bit simple, but a quick perusal at it looks
> like it'd do the job.  The kit I built was really only designed to make

Yeah, I didn't like the output stage, either. It consumes a *lot* of
power. It would be much better with active pull-up, or even just an
emitter follower output stage. He's creating a 75 ohm output impedance,
and wasting a lot of power doing so.

Also, I'd rather have a couple of crystal controlled counters than
one-shots controlled by pots. Its one big advantage is being cheap
and easy to build.

[snip]

> DRM - Deny Replaying of Material...

:-)

Mike
-- 
p="p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}
Oppose globalization and One World Governments like the UN.
This message made from 100% recycled bits.
You have found the bank of Larn.
I can explain it for you, but I can't understand it for you.
I speak only for myself, and I am unanimous in that!