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Forums > CSDb Discussions > HDMI upscaling on a budget
2017-11-27 12:05
MagerValp

Registered: Dec 2001
Posts: 1081
HDMI upscaling on a budget

I love my CRT to death, but sometimes a more compact option is needed. Does anyone know of an HDMI upscaler that doesn't cost $400, outputs 50 Hz without artifacts or dropping frames, and shows aspect correct 4:3 with black bars on a 16:9 display? The $30 converters on eBay are crap. Specifically, has anyone tried these KanexPro converters? http://www.kanexpro.com/converters/composite/
 
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2017-12-04 14:09
Oswald

Registered: Apr 2002
Posts: 5109
yep
2017-12-04 14:34
Mr. SID

Registered: Jan 2003
Posts: 425
I'd see if somebody who's into designing/manufacturing hardware could do a simpler solution. There's a lot of money in a cheap Framemeister clone.
The fact that there doesn't exist one yet, makes me think that it's actually not feasible...
2017-12-04 15:22
chatGPZ

Registered: Dec 2001
Posts: 11443
thing is that it wont get much "simpler". and if you cant just take an off the shelf IC (which those $30 solutions do that work like crap) it wont get cheaper either :)
2017-12-04 17:45
Deev

Registered: Feb 2002
Posts: 206
Quote: Framemeister is the thing that does it? 50HZ and all that? No flaws?

It gives by far the best picture I've seen from a C64 on a modern display, with smooth 50hz motion.

It can be *slightly* buggy on PAL sources. Once it's set up, you're fine, but every now and again I've found changing some of the options on a PAL source can lock up the unit.

I got one because I have a number of old consoles/computers that I wanted to hook up to my TV and I think it's been a good purchase. In particular, it handles 240P RGB extremely well.
2017-12-04 20:24
Krill

Registered: Apr 2002
Posts: 3003
One would think that affordable ADC+FPGA/CPLD circuits for this purpose might be around the corner...
2017-12-04 21:34
MagerValp

Registered: Dec 2001
Posts: 1081
Oh it's quite doable, and indeed the components are out there. It's above the level of most hobbyist engineers though (myself included), and commercially it's unlikely to be profitable, so... here we are.
2017-12-04 22:27
chatGPZ

Registered: Dec 2001
Posts: 11443
krill: sure, and R&D usually comes for free :)
2017-12-04 22:33
JackAsser

Registered: Jun 2002
Posts: 2036
Quote: Oh it's quite doable, and indeed the components are out there. It's above the level of most hobbyist engineers though (myself included), and commercially it's unlikely to be profitable, so... here we are.

LFT will rescue us, no worries. Right Linus? :D
2017-12-04 22:57
Deev

Registered: Feb 2002
Posts: 206
There's the OSSC which is an open source alternative (https://github.com/marqs85/ossc), but at the minute, it doesn't have s-video input. So, perhaps all we need is a good s-video to RGB transcoder? :)

Pre-assembled units are still fairly costly, though anyone with the skills could build their own for the price of the components.
2017-12-05 08:05
MagerValp

Registered: Dec 2001
Posts: 1081
Since the OSSC does everything right and is open source, it'd be the perfect project to build upon. Converting from S-video to RGB is unfortunately one of those things that seems like they should be simple, but turn out to be complex. The old analog chips that do it are hard to source and hard to use. This converter can be found for about $80, but I don't know if it's any good.

The OSSC has everything you need to do it though, and they have already solved most of the important problems like generating proper HDMI and getting the hardware built. Integrating something like the TVP5150AM1 seems plausible.
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