Bitgod

So if I have my A30 set for the 1080p24 mode, and I put in a disc of TV material (Star Trek, BSG, whatever), should I be changing the output mode back to 1080p60 for the non-film stuff?

Supermallet

Star Trek was shot on film.

Drexl

I think the non-film stuff will display properly.

BravesMG

On my A35 it's hit-and-miss with SDDVD menus in 1080p/24. Sometimes you simply cannot navigate the menus, period, no matter what you do and sometimes it's no difference at all. In my experience, everything looks better in 1080p/24 without question, but I haven't done much non-film watching. But it's a pain in the ass to change the resolution to 1080p/60, load the SDDVD, pause the disc, change the resolution to 1080p/24, and go back to the movie.

I usually try the disc first in 1080p/24 and if it won't work, I change it to 1080p/60 and leave it, changing the resolution back when I'm done.

Edit: Sorry, I thought you were referring to SDDVDs. Everything I have watched looks unquestionably better in 1080p/24 on my Sony 60A3000, so I keep that setting as default unless I need to play around with resolutions like I mentioned above.

bub

Let's remember why we have 24fps (1080p24) in the first place...

Films are shot at 24 frames per second. TV is broadcast at 60Hz. 24 does not go into 60 evenly, that is why we have 2:3 pulldown. Each successive frame of film is displayed twice each 1/30 second, then three times each 1/20 second, then twice, then three etc... In this fashion, we are able to take films transferred to DVD and display them on our 60Hz televisions.

The problem is that 2:3 pulldown introduces artifacts in our image. So, purists would like to be able to eliminate the need for this digital processing of the image. That is why the newer, or higher end, DVD players even have 24fps as an option. Now, if your television, or display device, will display 24Hz then you can watch DVD's without 2:3 pulldown if the DVD player will output 24 frames per second.

All is good and right in the world, with the exception of video based DVD's and television broadcasts, which still are based on 60Hz. If you select 1080p24 on your DVD player and are watching a video based DVD, remember encoded at 60Hz, then you will once again, and needlessly, force the 2:3 pulldown process in order for the display device and the material on the dvd to be in sync.

HD DVD FILM material encoded at 24fps > 1080p24 > display device that can display 24Hz, NO 2:3 pulldown digital processing.

HD DVD VIDEO material encoded at 60Hz > 1080p24 > force 2:3 pulldown digital processing > display device (doesn't matter if it can do 24Hz or not).

HD DVD VIDEO material encoded at 60Hz > 1080p60 > display device at 60Hz, NO 2:3 pulldown digital image processing.

I would suggest only using 1080p24 on your DVD's with film based material. All other sources should be fed to your display device at 60Hz, just as encoded on video based dvd media or fed from your cable/satellite/off air antenna.

George

Bitgod

...duh, you're right, not a good example, heh.

Bitgod

Good info, so lets throw in a curve, lets say I'm using a Sammy 4071 120Hz TV, would that matter. I'm not sure if it has 5:5 pulldown because I've seen different people say different things (even just did a quick search while typing this, and find different answers). I guess the safe answer is, if it's a TV show that's not old enough to be shot on film, stick with changing the output to the 60?

bub

The sole purpose of 120Hz is so that both 60Hz television and video material as well as 24fps film based material can be displayed with absolutely zero digital 2:3 pulldown processing because 120Hz is evenly divisible by both 60Hz and 24fps. A 60Hz signal will display each frame twice and a film based 24fps will display each frame 5 times, both fitting into the 120Hz refresh rate evenly with no need to manipulate the signal with 2:3 pulldown, which displays the first frame 2 times, then next 3 times, then 2 times etc...

I can't imagine why a television/display manufacturer would engineer their system for 120Hz and not do 5:5 pulldown, it just doesn't make sense. It isn't that pulldown is a bad thing as long as the ratio is 1:1 (2:2, 3:3, etc...). All that means is that each film frame is displayed the same number of times so that after all frames are displayed whatever number of times are required to match the display refresh rate, in this case 120Hz.

Manufacturers have engineered their display devices so that both common forms of digital video signals, 60Hz and 24fps, display correctly on their displays without the signal being degraded by the 2:3 pulldown process.

I think it fairly safe to say that your Samsung display, if truly a 120Hz display, does indeed do 5:5 pulldown.

George