[Openchrome-users] VGA to RGB Scart

[Paul Gardiner]

Ivor Hewitt wrote:
> On Sun, Sep 14, 2008 at 10:45:25PM +0100, Paul Gardiner wrote:
>> My CN700/VT1622A based MythTV frontend doesn't give quite
>> as good a picture as my old DVRs. It's as sharp but, the
>> colours are not quite as good. I think it's because of using
>> S-Video.  The VT1622A can apparently output component, but
>> one of the connections isn't made on the J7F2 board, and
>> wiring it up with a soldering iron looks very scary.
>>
>> I've read that VGA produces the right level and impedance
>> signals to run into Scart. It's just the timings and sync
>> that needs altering. Can the CN700 be made to produce
>> TV timings from VGA? And does openchrome support that
>> mode of use? Also, can the syncs be combined by the
>> chip, or does that have to be done with an external
>> circuit?
>>
> 
> It's not possible to get an interlaced signal from the VGA port unfortunately. So a VGA-SCART convertor won't work I'm afraid.

Shame, but thanks for the info. Best knowing that before
building the circuit.

My TV can handle progressive 100Hz, I think. Could that
be a route forward? Or am I going lose more than I gain
in terms of quality?

Cheers,
	Paul.