gt4 does 1080i ingame

Could it be also possible it's triggering HDTV set's internal upscaller to 1080i? HTPC owners would be familiar with this... rendering only 852x540 desktop screen, and doing the correct timing using powerstrip, then HDTV's would render it to 1080i automatically? Or Sony could have it's own upscaller in the game, like some have suggested before.
 
Marc, can you still tell the same difference between SoulCalibur2 and B3/MGs2 etc.?
The game uses half height front buffer in interlaced mode. It switches to full height in progressive mode only (the tradeoff is that frontbuffer in SC2 480P is 16bit).
 
Shogmaster said:
(There is good reason why Polyphony bothered to come up with the "HiVision" moniker for this mode instead of just calling it a plain old 1080i by itself in the first place).
Click to expand...

Actually Hi-Vision refers to the Japanese HDTV standard produced by NHK. The name Hi-Vision was used in the original 1981 demo. Polyphony didn't come up with that name.
 
I thought 480p in 16:9 mode = 852 lines of horizontal resolution rendered
Click to expand...

480p source material is 640x480 (or 704/720 x 480). It is then expanded horizontally by the display. This isn't a hack, its how all DVDs are encoded. The widescreen part is anamorphically squeezed so that when its stretched by the TV it looks OK. The FOV stuff when your game is running 16:9 does the same thing - squashing a 16:9 FOV into a 4:3 image - which is then reconstructed by the TV.

Thats where I get confused, because I don't know whether higher resolutions (720p, 1080i) need properly delivered native res, or do similar upscaling on the display (eg feed 720x720 and the TV stretches horizontally to 1280x720)?
 
Fafalada said:
It didn't, but the backbuffer was full height, which comes out the same on interlaced displays.
The advantage of full height front buffer is abiility to run progressive scan, and being able to run at less then 60fps, not any image quality difference per se.

But using the same interlacing trick, 2 full height buffers become half height 1080 buffers in this new mode - with no additional rendering cost.



It's not, it's 640x480. :)

852x480P wouldn't make any sense to VGA screens among other things. Even if it's "cheating" DTV standards a little, that's how consoles do it.
Click to expand...

Anyways judging from the screens it's hard to believe 1080i is rendered from a half size rear frambeuffer...There are no jaggies...Kinda strange...Perhaps they are doing some kind of post-processing to the front framebuffer...
 
mrklaw said:
480p source material is 640x480 (or 704/720 x 480). It is then expanded horizontally by the display. This isn't a hack, its how all DVDs are encoded. The widescreen part is anamorphically squeezed so that when its stretched by the TV it looks OK. The FOV stuff when your game is running 16:9 does the same thing - squashing a 16:9 FOV into a 4:3 image - which is then reconstructed by the TV.

Thats where I get confused, because I don't know whether higher resolutions (720p, 1080i) need properly delivered native res, or do similar upscaling on the display (eg feed 720x720 and the TV stretches horizontally to 1280x720)?
Click to expand...


So, in a sense, 480p 16:9 comes at the expense of some horizontal resolution (since the 33% extra information is still being represented by the same 640 pixels across)? Essentially, the 4:3 part of such an image is just a 480x480 anamorphically squeezed portion. 480p 4:3 should technically look better since that portion would be a full 640x480.

As far as GT4 is concerned, 640x1080i definitely seems to be what was done here, in that case.
 
Shogmaster said:
Hold on a bit though. The fact of the situation is that gt3cobra was wrong to say GT4 does "1080i".

By looking at the evidence, it's clear that GT4 is not doing true 1080i, no matter what Sony is saying in their press material. It's doing what looks like 640x1080i internally and then stretching it horizontally x3 (basically showing the same pixel 3 times in a row horizonatlly). That's far from true 1080i (1920 horizonal pixels). It's not even rendering as many pixels as 720P (1280 pixels x 720 pixels vertically).

In a single frame (60th of a second), GT4's "Hivision" potentially has to crank out 345,600 new pixels (640x540), while a true 1080i 60FPS game would have to crank out 1,036,800 new pixels (1920x540), and 720P 60FPS game would have to crank out 921,600 new pixels (1280x720).

345,600 vs. 1,036,800. That's only a third of true 1080i. I think folks here were right to be skeptical, no?
Click to expand...

Oh, you're right! gt3cobra is a big fat liar! Good thing you guys didn't fall for his lies! Yeah, in that case, I guess everyone's uncivil comments were justified...

"Nothing wrong with skepticism, but have a little courtesy."
 
fobtastic said:
Oh, you're right! gt3cobra is a big fat liar! Good thing you guys didn't fall for his lies! Yeah, in that case, I guess everyone's uncivil comments were justified...

"Nothing wrong with skepticism, but have a little courtesy."
Click to expand...


The difference is, I didn't call gt3cobra a "liar". Not at all.

He not at any fault obcourse, but at the same token, I don't think all the skeptics were PWN3D either. Neither side had the whole picture.
 
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