Gran Turismo 4 NTSC 1080i issue
#21
(12-06-2013, 01:52 AM)Nobbs66 Wrote: How many resolutions does the ps2 do?

Hmmm...(these are internal resolutions that I've seen)

640x480
512x384
640x448

But I'm sure there are lots more.
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#22
It can do any resolution requested, even really strange ones (within the limits of the technology, video bandwith and all).
The problem is that we only know the x resolution for sure. The GS does not "know" what the y resolution is, it simply processes
the pixels as long as they keep coming.
This might not be 100% accurate but it's as good as I remember it Smile
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#23
(12-07-2013, 02:04 PM)rama Wrote: It can do any resolution requested, even really strange ones (within the limits of the technology, video bandwith and all).
The problem is that we only know the x resolution for sure. The GS does not "know" what the y resolution is, it simply processes
the pixels as long as they keep coming.
This might not be 100% accurate but it's as good as I remember it Smile

Why is it that you know the x but not the y? It would make more sense to me the other way. Since CRT TV was what was predominant when PS2 came out, and CRT has no X resolution. 480i means 480 interlaced scanlines. Generally when we digitize the content the X is 640 or 720, but the actual scanline is a continuous analog signal.

So yeah, it would make more sense to me reversed lol.
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#24
Every content has a source resolution but the different stages of processing and then displaying can blur it quite a bit.
The X resolution is written to a register, Y is not. That's all I know Smile
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#25
can't you make a game index where the resolution is listed?
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#26
(12-08-2013, 12:09 AM)willkuer Wrote: can't you make a game index where the resolution is listed?

That's what I was thinking, but if you have so many different possibilities it could cause slowdowns.
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#27
(12-08-2013, 12:09 AM)willkuer Wrote: can't you make a game index where the resolution is listed?

(12-08-2013, 12:26 AM)Nobbs66 Wrote: That's what I was thinking, but if you have so many different possibilities it could cause slowdowns.

Still one would need an accurate way to obtain that X resolution to make the database.
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#28
The PS2's GS was capable of outputting any resolution up to a max of 1920x1080. Obviously no game used this, bandwidth constraints and raw power simply not being there, etc. -- but yeah.

As for GT4 and Tourist Trophy's "1080i" modes, it wasn't even true 1080i at that.

A 'true' 1080i frame is 1920x1080. A 1080i *field* (since it's interlaced) would be 1920x540. The PS2 couldn't even realistically process that type of frame (it couldn't even do a full 1280x720 frame), however gimped it is, so those games utilized a form of trickery to achieve this resolution. What Polyphony opted to do instead was render each frame as 640x540 by tripling the horizontal rendering resolution. They achieve this by 'squishing' the 640 frame and then stretching it out via simple post-processing/upscaling instead. This causes those pixels to show up three times instead of only once, which is why a lot of people reported 480p offering 'better image quality' than 1080i did. So in a sense, you're getting 1920 pixels horizontally, just not 'true native' pixels, causing the image to look a little distorted and compressed.

This is why PCSX2's internal scaling is superior to the in-game 1080i option. It's generally best in most cases to not bother with the in-game progressive/alternate render output modes, however in some games you can notice a slight improvement with them enabled.
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#29
Even ps3 in the resolution of 720p in bf3 compaired to pc's 720p in bf3 u see the graphic diffrence . Pc got best. This is what an old age console not truely renderer hd resolutions.
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#30
1080I is worse than 720P. I don't know why anyone would want to use it.
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