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1920 x 1080 resolution at 30hz and at 60hz... What's the difference on a 1080i HDTV??

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Sprokethead

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Discussion starter · #1 ·
Is there a difference? I've just spent hours trying to figure out what I should be doing with my 1080i TV, whose native resolution is 1360 x 768.

So I've found the following "information," and they can't all be true and still be logical. Can anyone tell me what is true???

I understand that different connectors will play a part... but I'm just looking for some ground rules when thinking about resolution and how high I can force mine.

1920 x 1080 @ 30hz = 1080p
1920 x 1080 @ 60hz = 1080i
1440 x 900 = 1080i
1360 x 768 = 720p

I've also read that there is no such thing as interlaced when dealing with a signal from an HTPC, since it is all sent at once (progressively).

I've been reading about this so long I can't even think straight anymore.

So can someone tell me, is there any way of utilizing all 1080i lines of my LCD TV by using my computer?

Note: my display does not allow 1:1 pixel mapping, so HDMI currently looks like crap and I'm using VGA at 1360 x 768...

help.
 
Discussion starter · #4 ·
Ah, thank you. So does it have anything to do with what my screen will display? Will a screen whose native resolution is 1360 x 768 @ 60hz display a 1920 x 1080 @ 30hz? Wouldn't that make it a 1080i-type resolution?
 
#5 ·
Ummm...

How can an LCD's native resolution not be its max?

These aren't CRTs.

If has 1360 x 768 pixels, you can't make it show any more.
 
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Discussion starter · #6 ·
I guess what I'm getting at is that 1360 x 768 seems awfully close to 720. I want more than 720, which is why I bought my TV. Now it seems that I can't use it.

So that's my issue. I just don't understand how a 1080i TV doesn't have 1080 lines of resolution.
 
Discussion starter · #7 ·
Quote:

Originally Posted by TEntel View Post
Ummm...

How can an LCD's native resolution not be its max?

These aren't CRTs.

If has 1360 x 768 pixels, you can't make it show any more.
But doesn't 1080i imply that it has 1080 lines on it. And doesn't that mean that it should support a 1920 x 1080 resolution?

I don't know the answer to that by the way...
 
#8 ·
Quote:

Originally Posted by Sprokethead View Post
But doesn't 1080i imply that it has 1080 lines on it. And doesn't that mean that it should support a 1920 x 1080 resolution?

I don't know the answer to that by the way...

1360 x 768 is the standard resolution for 720p LCDs.

If the TV is telling you it can support 1080i, it simply means that it will downscale a 1080i signal into a 720p one.
 
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#9 ·
Quote:

Originally Posted by Sprokethead View Post
Ah, thank you. So does it have anything to do with what my screen will display? Will a screen whose native resolution is 1360 x 768 @ 60hz display a 1920 x 1080 @ 30hz? Wouldn't that make it a 1080i-type resolution?
for desktop you want to run the native, games are fine at above, native is the clearest, if i set 1080p on desktop somethings will get distorted

Quote:

Originally Posted by TEntel View Post
Ummm...

How can an LCD's native resolution not be its max?

These aren't CRTs.

If has 1360 x 768 pixels, you can't make it show any more.
lcd tv's, not lcd's
you CAN force any lcd to run higher, but it might not work

Quote:

Originally Posted by Sprokethead View Post
I guess what I'm getting at is that 1360 x 768 seems awfully close to 720. I want more than 720, which is why I bought my TV. Now it seems that I can't use it.

So that's my issue. I just don't understand how a 1080i TV doesn't have 1080 lines of resolution.
computer lcd's are alot better for computers than tv's, they are made to get that resolution while being able to read text, tv's wernt really ment for text
 
Discussion starter · #10 ·
Quote:

Originally Posted by TEntel View Post
1360 x 768 is the standard resolution for 720p LCDs.

If the TV is telling you it can support 1080i, it simply means that it will downscale a 1080i signal into a 720p one.
Thank you much for clarifying the 720p resolution.

Of course, that's what I was afraid of. My TV isn't telling me anything, it's just doing it! Why is my tv downscaling the resolution? Seems like it should support a higher resolution, specifically 1920 x 1080 @30hz.
 
#11 ·
Quote:

Originally Posted by Sprokethead View Post
Thank you much for clarifying the 720p resolution.

Of course, that's what I was afraid of. My TV isn't telling me anything, it's just doing it! Why is my tv downscaling the resolution? Seems like it should support a higher resolution, specifically 1920 x 1080 @30hz.
What type of connection are you using? Component dongle?
 
#12 ·
Quote:

Originally Posted by Skullzaflare View Post
lcd tv's, not lcd's
you CAN force any lcd to run higher, but it might not work

So an LCD TV is a different type of LCD that has a dynamic number of pixels?
Image
 
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Discussion starter · #13 ·
Quote:

Originally Posted by hairston630 View Post
What type of connection are you using? Component dongle?
I'm using VGA because HDMI looks like crap. The reason it looks like crap is that my HTDV has no option for 1:1 pixel mapping. In other words, there is no way to turn off "overscanning," which is necessary for... who knows.
 
#14 ·
Quote:

Originally Posted by Sprokethead View Post
I'm using VGA because HDMI looks like crap. The reason it looks like crap is that my HTDV has no option for 1:1 pixel mapping. In other words, there is no way to turn off "overscanning," which is necessary for... who knows.
The resolution problem is in your vga connection. If you cant get HDMI to work then the VGA resolution is going to be the best your pc and tv can produce together. I have a 1080p monitor and I hooked up the 360 to it through VGA and it was limited to a very low res, though I know I support 1920x1200. I am sorry that your in this position but I dont think there is much you can do with your current setup. Is this a new tv you say?
 
Discussion starter · #15 ·
Quote:

Originally Posted by hairston630 View Post
The resolution problem is in your vga connection. If you cant get HDMI to work then the VGA resolution is going to be the best your pc and tv can produce together. I have a 1080p monitor and I hooked up the 360 to it through VGA and it was limited to a very low res, though I know I support 1920x1200. I am sorry that your in this position but I dont think there is much you can do with your current setup. Is this a new tv you say?
No, I just couldn't afford 1080p at the time. It was $600 at Office Depot so I just went for it. That was like 1.5 years ago before I knew anything except what "i" and "p" meant. I wish I could go back and get one with 1:1 pixel mapping- then I could use HDMI.

However, I've never tried to force 1920 x 1080 @ 30hz using Powerstrip. Maybe that would help? Or maybe that would cause a 1:1 pixel mapping? There has to be some number that makes a 1:1 ratio. Instead of finding it by changing the tv setting, maybe I can find it by changing the computer setting?

That just occurred to me.
 
#16 ·
Quote:

Originally Posted by Sprokethead View Post
No, I just couldn't afford 1080p at the time. It was $600 at Office Depot so I just went for it. That was like 1.5 years ago before I knew anything except what "i" and "p" meant. I wish I could go back and get one with 1:1 pixel mapping- then I could use HDMI.

However, I've never tried to force 1920 x 1080 @ 30hz using Powerstrip. Maybe that would help? Or maybe that would cause a 1:1 pixel mapping? There has to be some number that makes a 1:1 ratio. Instead of finding it by changing the tv setting, maybe I can find it by changing the computer setting?

That just occurred to me.
Is this an lcd or a crt monitor? You want to be careful as forcing higher resolutions and refresh rates can damage your monitor. Try forcing those settings at your own risk.
 
#19 ·
Quote:

Originally Posted by Sprokethead View Post
My tv just flashes and says "Out of Range." Dangit.
Yes, thats normal to display that. I wouldnt try it more than once, just to be on the safe side. Are you trying to play games on this tv? Or dvd's?
 
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