Originally Posted by htwaits
That's one possibility. I don't know for sure what Samsung does with the 24Hz signal once it receives it.
When you set the PS3 to 60Hz then the PS3 must use 3:2 pull down to convert the 24Hz movie data to 60Hz for output to your TV.
I'm not about to try to explain what the PS3 output choices mean.
If I had one I would set it to 24Hz.
htwaits, first off thanks a lot for taking the time to do these detailed posts, they were very informative. As you point out, it seems that no one is *really* sure about just how exactly the 7288 processes 1080 p @ 24 fps. After reading your posts and a thread on another forum entirely on this issue, though (about displays that can process 24 fps at a "multiple" of 24 fps, like 72, 120, etc., thus avoiding the 3:2 used by 60 hz and as a result supposedly reducing judder), I am of the thought that this set does it at 60 hz
, that is, with 3:2 pulldown. First off, there is jnelson's reference to the service manual saying that it operates at a 60hz rate. My understanding is that if that's the case, then the tv is doing 24 fps with the "standard" method of 3:2, as most TVs run at 60 hz and so need to do 3:2. Then, there is the Samsung brochure itself, which explicitly mentions "Cinema Smooth 3:2 pulldown" in reference to 24 fps. Finally, although the brochure says the TV does 120hz, after reading more about Samsung's "3D Ready" technology, I'm pretty sure that this 120hz is for that limited purpose, i.e., the
3D technology. Whatever these mystery movie/games that this TV says it's ready for, it seems that the technology requires 120hz for that. However, I don't believe this means that the TV uses 120hz for ALL purposes. This wikipedia article explains this possibility:
"Another possible advantage of 120hz that is not employed on all 120hz sets
is that it is possible to do what is referred to as 5:5 pulldown at 120hz rather than 3:2_pulldown at 60hz . The advantage with 5:5 pulldown is that motion follows a linear path versus going faster 40% of the time and slower 60% of the time. 3:2 pulldown shows odd frames for 49.98 milliseconds and even frames for 33.33 milliseconds. 5:5 pulldown shows all frames for 41.65 milliseconds. and is therefore able to reproduce the original timing of the presentation of the image data created on the 24 frame-per-second hollywood film medium." http://en.wikipedia.org/wiki/HDTV_Blur
Finally, I don't think this TV does 24 fps using 120hz because even with new TVs, this is still a rare (and expensive) technology and the TVs that do have this make a big deal of it in the advertising materials. For instance, the two TVs that I'm aware that certainly use 120hz for 24 fps, the upcoming Mitsubishi 833 "Diamond" series and the Sony XBR5s, both trumpet this feature on the website, while there is nothing about it on Samsung's.
Having said ALL THAT, I am still going with the 7288. I think this judder issue is a bit overblown, and most people don't realize that even if a TV introduces judder when processing 24 fps, the judder problems tend to occur in a relatively small number of scenes, usually those involving "panning" across the screen or with very fast action. If this set indeed uses 3:2 pulldown for 24 fps, theoretically more judder would be seen than with TVs that don't need to do 3:2, but I refuse to believe that the technology Samsung puts in its "latest and greatest" would be crappy. In addition, I would rather go with Samsung than Mitsubishi because the latter's products are sometimes problematic in terms of quality, and the Sony 70 inch XBR5 is very expensive (6000), very heavy (240 pounds), and of course, 2 inches smaller
Also, it doesn't have this 3D-ready feature that the Samsung has (who knows what it actually does
). So anyway, while I think this TV does use 3:2 pulldown, I don't think it's that big a deal and I'm going to stick with it.
Jnelson, just for closure of the issue, it would be great if you could ask your engineer contact at Samsung about this. I think I know what the answer will be.