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Why is my Dreamcast displaying tiny with a new HDMI cable? (infosec.pub)

submitted 3 weeks ago by macstainless@discuss.tchncs.de to c/retrogaming@lemmy.world

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Picked up a Hyperkin Dreamcast cable that outputs via HDMI. I tried it out and it’s displaying in this tiny box on my TV. The box on the cable has no settings and the TV is a 1080 Sony Bravia.

I’m not sure what options I have aside from stretching the image via the TV settings but if anyone can assist, it would be appreciated. Thanks.

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[–] macstainless@discuss.tchncs.de 7 points 3 weeks ago (10 children)

I was using an RCA cable output prior to this. It worked great, though was lower quality of an image than I would’ve liked.

I’ll have to check the display mode on the tv and see if any other options exist. I did play it in Fill mode which kept the 4:3 resolution but I feel like that sorta defeats the purpose of using hdmi.

[–] AlternateRoute@lemmy.ca 24 points 3 weeks ago (6 children)

I’ll have to check the display mode on the tv and see if any other options exist. I did play it in Fill mode which kept the 4:3 resolution but I feel like that sorta defeats the purpose of using hdmi.

Well no? You are getting a digital signal which will be MUCH clearer than analog RCA.. Upscaling / fill mode is the Only way to make it bigger.

[–] macstainless@discuss.tchncs.de 2 points 3 weeks ago* (last edited 3 weeks ago) (4 children)

You’re right. The picture is cleaner but ~~choppy~~ not crisp from TV being set to Full. That’ll have to be my Solution for the time being.

[–] AlternateRoute@lemmy.ca 6 points 3 weeks ago (1 children)

If your TV has a crappy upscale then you can look into external hardware, however seems odd this is making it choppy, does your TV have a low latency GAME mode?

[–] macstainless@discuss.tchncs.de 4 points 3 weeks ago (2 children)

With this cable it’s getting the signal as vga, so it’s “pc” settings. No lag or anything. And I meant choppy like lines and such. Should’ve said “crispness”. The game plays flawlessly on the tv with no output issues.

Sorry for the confusion.

[–] wizardbeard@lemmy.dbzer0.com 8 points 3 weeks ago

Yeah, as said, that's going to be due to however your TV upscales things.

Getting a dedicated scaler will help, but bear in mind that you're taking an image that's at least 1/4 smaller (might be less than that, can't remember the math off hand) than your screen's native resolution and zooming in on it.

Using most scalers gives you a ton of options for how to zoom in. Straight pixels, bilinear (or trilinear) filtering, and some have various shader effects as well to emulate the style of TVs these consoles were made for.

By using HDMI/VGA you are getting the clearest digital signal version of that image possible, but it's still tiny, and any way you choose to expand it will have pros and cons.

[–] AlternateRoute@lemmy.ca 3 points 3 weeks ago* (last edited 3 weeks ago)

And I meant choppy like lines and such. Should’ve said “crispness”. The game plays flawlessly on the tv with no output issues.

You probably need to take a picture, you might be describing that the output is 480i interlaced where every other line is drawn and some modern TVs will render that badly. In which case it is a deinterlacing issue.