Converting TV signal from Amiga to HDMI?

[AmmoJammo]

A600's and 1200 can be easily modified to give an svideo output...

One TV I have here, with a scart input, the quality actually appears to be worse than svideo... its a Grundig tv, and just doesn't seem to scale the signal as well...

RGB/scart to ypbpr appears to give a good picture, the best I've seen actually... but not all tvs will accept this signal, so its a bit hit and miss if you go that route...

Now, not from my own experience, but from others reviews (and youtube videos) rgb to hdmi will give a picture that's worse than svideo, and barely an improvement on composite.... well, lets say somewhere in the middle

[AmmoJammo]

I'm not claiming nor attempting to convert the world to HDMI, but in a price to quality (where there are soo many cheapskates in the Amiga domain) this beats the alternatives by costing half to one fourth as much

How is $60 for the hdmi converter "half" the price of the $60 ypbpr converter? :hammer: lol

[AmmoJammo]

If you're not sure if your TV will support the component signal from the scart to component adapter, try plugged the composite output from the Amiga into the GREEN component socket, and see if it displays a black and white picture

Although I'm not 100% sure this will show if the TV doesn't work, as all my TV's displayed the scart to component from the Amiga just fine.

[AmmoJammo]

get some black duct tape... lol

[AmmoJammo]

They make Indivisions for all models of Amiga.

What about the Sega Mega Drive? and the Sega Genesis? And the Super Nintendo? and every other 15Khz game console or computer?

[AmmoJammo]

So I wonder how I tell which one I need to get. Apparently, this one has trouble with the Amiga:

http://www.ebay.com/itm/370695549240?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

because that is the one I purchased.

Thats the one I have... its not so much an issue with the Amiga, but rather the TV it's being used on, and mine works on every tv I've tried it on

It should be possible to modify the adapter to work on every tv, but I haven't looked into this...

[AmmoJammo]

I am considering the possibility of modifying, but have found no resources on this. Honestly not sure what to plug into Google. The only thing that comes close are people that have opened them up to adjust pots for improving image quality.

I'm looking into these modifications now, as I've found my new monitors (which are TVs) don't support the output from this adapter...

I'll try and find some information on what's needed...

edit: the issue is basically that standard definition uses a bi level sync, while high definition uses tri level... just googling it now

[AmmoJammo]

indeed!

[AmmoJammo]

My results are much the same as magnetic's. I see a rock-solid monochromatic image, in the correct aspect-ratio as well! The TV reports it as 480i.  

Unfortunately, when I switch to PAL mode, the screen goes blank.  

I will test an interlaced screen when I get my WB 3.1 booted up again.

Is this the tv/monitor that worked with the composite signal fed into the "green" connector on the component input?

But now you're saying it doesn't work with the scart to component adapter?

I ask, because my tv that doesn't work with the scart to component adapter also does NOTHING with the composite signal fed into the "green"component input....

I'll see what my other tvs report the signal as being with the scart to component adapter... I've never looked!

[AmmoJammo]

connect the "red" and "blue" lines from the scart to component adapter, and use the monochrome/composite output from the amiga as the "green" input, and see what happens?

[AmmoJammo]

There's something very weird about your screen, as mine that won't accept the signal, won't work with a composite signal fed into the "green" component input at all...

Yours probably only needs adjusting because the level of the signal from the monochrome output is higher/different than expected...

[AmmoJammo]

You may need to add a resistor or capacitor, or both, or a potentiometer, into the "green" line from the monochrome output from the amiga to be able to adjust it how you want...

[AmmoJammo]

Twiddle away and see how you go! But I think an incorrect level on the "green" input, that you can't adjust, will mean you won't be able to get it right

But, I could be wrong, its happened before

[AmmoJammo]

Just out of curiosity, I connected my second SCART to Component box (same seller sent me a replacement) and it did not display the same level of green, so more evidence that the box is the source.

Also, it would appear that the "green" cable is not actually the source of the green in the component signal:

http://en.wikipedia.org/wiki/YPbPr

So getting back to this clever idea you had to try this in the first place, does this conclude that this is a sync problem with what is coming out of the box? Does this help you in your quest to make your own mods?

As far as I'm aware, the sync on the rgb port of the amiga should be the same as the sync on the monochrome output...

I'm wondering if your scart cable is actually wrong, as I believe they both should simply be composite sync...

Oh yeah, its not green, that's why I keep putting "green" in quotes

But it does effect the amount of green from memory...

[AmmoJammo]

I've been trying this with a Sega Megadrive/Genesis... and I'm confused....

This tv won't take the composite signal, from the megadrive, on the "green" component input, and it doesn't work with the scart to component adapter...

But... it will take a composite signal from another source, and display a black and white image, so it doesn't seem to be a bi/tri level sync issue at all?