[Coco] CoCo 3 to VGA

Kevin Diggs kevdig at hypersurf.com
Mon May 24 15:34:35 EDT 2004


	I don't think we need the de-interlacing either. I am pretty sure the
video signal has no even (or odd) field.


Bob wrote:
> > There's also an outfit called AverLogic that makes a scan doubler chip
> > (http://www.averlogic.com/video_converter/AL250.html). They're REALLY
> > close-mouthed about how much they sell the chip for, though.
> >
> I have one of these chips in a device called InstanTV for viewing TV on a VGA
> monitor. Only RF and composite inputs though :(
> I have the datasheet, reference design and other useful pdf's on the AL250
> (probably still available from their website), and think someday I may try to
> experiment with it.
> DESCRIPTION (from the flyer):
> The AL250 Video Scan Doubler (De-Interlacer) is a video conversion chip for
> consumer video and multimedia applications. It converts interlaced NTSC
> or PAL, ITU-R BT 601 (CCIR601) or square pixel, YUV422 or RGB565 digital
> signals into computer monitor RGB signals for direct connection to a computer
> monitor or progressive scan TV.
> So we'd still need A/D, but I agree with an earlier post that this might be
> do-able with discreet components since there are only four levels per signal.
> Bob
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