1080P-24fps compared to 1080P-60fps?

akirby · Post by **akirby** » Fri Nov 21, 2008 1:04 pm

I believe PS3 can provide 1080p/60 but I'm not 100% sure.

Richard · Post by **Richard** » Sat Nov 22, 2008 6:50 pm

That would be correct but is limited to gaming only; good point! It would be possible to download 1080p60 content from the Sony Store if provided but that is unlikely due to double the bandwidth and storage...

akirby · Post by **akirby** » Sun Nov 23, 2008 8:52 am

Sorry, I meant to say for games only.

Richard · Post by **Richard** » Sun Nov 23, 2008 7:38 pm

Thinking about this some more today I doubt this is true for the PS3. Sure, a game could in theory provide a 60 frame response but it takes a helluvalota horse power to make that happen with a PC and neither console, PS3 or Xbox, has that. I seem to remember this coming up with my son and I and his researched conclusion that while the PS3 can provide 1080p gaming it is limited to 30 frames. This fits the observation of how easily the PS3 can choke with 720p games - loss of frame rate causing strobing motion or momentary freezing.

BTW, Xbox has 2-3 1080p games...

akirby · Post by **akirby** » Mon Nov 24, 2008 7:04 am

Wipeout HD for PS3 is 1080p/60.

hendrikus · Post by **hendrikus** » Mon Nov 24, 2008 10:18 am

Video refresh rate is not the same as game frame rate. This is especially obvious on pc's with vga. You set your vga adapter horizontal refresh rate to match your pc monitor, let's say 70Hz. That means that the pc sends a video frame to the monitor 70 times per second. But you may be running a game on the pc that has a frame rate of 20Hz. This means it generates a new screen output frame 20 times per second. These two values don't have to match. If your video game frame rate is higher than the horizontal refresh rate of your monitor, then some of the frames generated by the game just aren't displayed. If the frame rate of the game is lower than the refresh rate of the monitor, some frames are displayed multiple times.

So if the PS3 can output 1080p resolution at a 60Hz refresh rate, then that doesn't mean it generates 60 frames per second for the game. It depends on the complexity of the game. The more calculations the game has to do per frame, the fewer frames per second it can generate. Whatever the game puts in the video buffer gets sent to the tv 60 times per second.

akirby · Post by **akirby** » Mon Nov 24, 2008 11:04 am

No, it actually creates and maintains 60 FPS for the entire game. What it does, apparently, is reduce the resolution inside the frame (frame by frame) if necessary.

http://insidethedigitalfoundry.blogspot ... -hand.html

Richard · Post by **Richard** » Fri Nov 28, 2008 8:29 am

hendrikus has it right and it appears this is a new game using an innovative technique to maintain 60 frames. Are there others Allen?

akirby · Post by **akirby** » Sat Nov 29, 2008 8:43 am

That's the only one I know of right now.

theking2 · Post by **theking2** » Sat Nov 20, 2010 7:49 am

akirby wrote:60 fps is the old NTSC standard since 1941. Film is shot at 24 fps. In order to convert a 24 fps dvd to a 60 fps video format you must do "3-2 pulldown" where alternating frames are repeated 3, then 2 times each (12x3 + 12x2 = 60 fps). This can cause artifacts. Therefore 1080p/24 is preferred for film sources so that you avoid the 3-2 pulldown.

Richard will be along shortly with tons of hd library references.......

So a 24fps films is converted to a 60fps DVD. And then switching your DVD player to 24fps so again converting the material is a good thing? I don't think so. 24fps is a compromise to reduce the use of raw film material. In the digital domain 60fps has non of these restrictions. So switching to 24fps only has a nostalgic value, not a quality one.

The 24fps feature was merely added to players to include yet another useless feature to DVD / Bluray players.