[mythtv-users] Which Nvidia card for TV-OUT?

[Christian Hack]

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org 
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Jason Schloer
> Sent: Friday, 7 November 2003 6:06 AM
> To: 'Discussion about mythtv'
> Subject: RE: [mythtv-users] Which Nvidia card for TV-OUT?
> 
> 
> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Jarod C. Wilson
> Sent: Thursday, November 06, 2003 1:49 PM
> To: christianh at pdd.edmi.com.au; Discussion about mythtv
> Subject: Re: [mythtv-users] Which Nvidia card for TV-OUT?
> 
> Christian Hack wrote:
> 
> >>Well, it may not save a huge amount of money. The transcoder 
> >>I got was 
> >>$108, though for me, it was well worth it. See if you can 
> confirm if 
> >>you have RGB or YPbPr Component inputs, because if you have 
> >>RGB, a $20 
> >>DVI->RGB Component cable should do the trick. If you can get 
> >>the exact 
> >>model number of your TV, I can try to take a look at the specs and 
> >>probably make a better recommendation that way.
> >>
> >>    
> >>
> >
> >Jarod, 
> >
> >I don't suppose you're inquisitive enough to have popped the 
> lid off one
> >of these?
> >
> 
> Nope, I never popped the lid on it.
> 
> >If not would you?
> >
> 
> I'll see about doing that this weekend...
> 
> >I believe I have the appropriate design
> >together to build one and would be interested at roughly 
> what's actually
> >inside one of these. I just need to get some slightly less 
> off the shelf
> >parts (digikey/farnell/RS have them though) and layout the board.
> >  
> >
> 
> I'll see if I can get a good picture of the internals also.
> 
> >The way I see it they are very dumb and mainly perform the 
> colour space
> >conversion and combine the sync into the Y signal. There 
> can't be that
> >much in them given their size either.
> >
> 
> Well, you've piqued my curiosity, so I'll give it a look-see... ;)
> 
> 
> Check out avsforum and do a search for DIY component or 
> something like that.
> They collaborated on a device to do it. They claim it's 
> better than most in
> that it does differentiate between the 480 color conversion 
> and HD color
> conversions, as there is a slight color space difference. I 
> have the design
> somewhere if you can't find it.
> 

Yes - found that a few hours after I posted although I did look a while
back and didn't turn up anything. Basically the same as my design plus
the two colourspace versions. It took me a few hours to read but the 50
(!) page thread is here:

http://www.avsforum.com/avs-vb/showthread.php?threadid=193919

If you're interested probably worth reading backwards. The thread
stretches over about 12 months and the design went from pretty crappy
breadboard designs to a decent looking PCB.

Gonna try and get the PCB into something other than ExpressPCB so I can
order it through our local supplier (saves me doing a layout which I'm
not good at).

(very OT) Anyone know if the PCB conversion is possible? Contact me off
list if you do.

CH