24hz from PC

[XxDeadlyxX]

Is there a list of 1080p HDTVs that successfully accept 24hz from a PC, using Nvidia + Vista?

I know some of the Bravias and Samsungs support 24hz, but does it work from DVI-HDMI and does it remove the judder from watching Blu-ray/HD-DVD?

[Jon]

I have a Sony KDL40V3000 Bravia. In vista, when I go into the display settings I can choose 24hz from the dropdown. This clearly works as the tv then says 1080p/24 in the top left for a few seconds. Films I'd previously noticed judder in are now completely smooth! (nana2)

Oh and its connected dvi->hdmi by the way.

[XxDeadlyxX]

Ah that sounds promising, so you can just choose 24hz from Display Settings -> Advanced Settings without any other configuring?

Unfortunately a Bravia 40" is a bit out of my price range, I'm looking at this one though:

http://www.samsung.com/au/consumer/detail/features.do?group=television&type=television&subtype=lcdtv&model_cd=LA40A550P1FXXY

It says it has 24fps playback, as to whether it works with PC though, I guess the only way to know is buy it and hope :(

[nekrosoft13]

My Phillips does, and with latest unofficial builds of XBMC it has auto settings. It automatically changes refresh rate depending on source material being played back.

[Jon]

Ah that sounds promising, so you can just choose 24hz from Display Settings -> Advanced Settings without any other configuring?

Yeah, its the usual screen refresh rate drop down on the monitor tab. My Sony has a load of options ranging from 24hz to 60hz.

[nrdstrm]

It says it has 24fps playback, as to whether it works with PC though, I guess the only way to know is buy it and hope :(

You should go to AVSForum and ask one of them to test that TV for you. I can almost guarantee someone has that set and a capable computer to try it out with...

[Toss3]

Anyone else getting a slight stutter every 30 seconds or so using 24Hz with blu-ray movies? Been driving me nuts and I just can't figure out what the problem is. :headexplode:

Panasonic plasmas support 24Hz from PC! :)

[Medion]

Ah that sounds promising, so you can just choose 24hz from Display Settings -> Advanced Settings without any other configuring?

Unfortunately a Bravia 40" is a bit out of my price range, I'm looking at this one though:

http://www.samsung.com/au/consumer/detail/features.do?group=television&type=television&subtype=lcdtv&model_cd=LA40A550P1FXXY

It says it has 24fps playback, as to whether it works with PC though, I guess the only way to know is buy it and hope :(

Negative. That set will take a 24p input from a device, but it's still going to run at 60hz, and thus, force 3:2 pulldown. You need a 120hz set for true 24p playback. Go with a Samsung 6-series. Amazon offers them at excellent prices with no tax and free shipping. Prices below are current as of this post.

40" 6 Series - $1289.98 (http://www.amazon.com/Samsung-LN40A650-40-Inch-1080p-120Hz/dp/B0014175NE/ref=pd_bbs_sr_1?ie=UTF8&s=electronics&qid=1229026293&sr=8-1)
46" 6 Series - $1460.80 (http://www.amazon.com/Samsung-LN46A650-46-Inch-1080p-120Hz/dp/B001413D94/ref=pd_bbs_sr_2?ie=UTF8&s=electronics&qid=1229026293&sr=8-2)
52" 6 Series - $1840.72 (http://www.amazon.com/Samsung-LN52A650-52-Inch-1080p-120Hz/dp/B001413DF8/ref=pd_bbs_sr_1?ie=UTF8&s=electronics&qid=1229026304&sr=8-1)

FYI, the panels used in the Samsung 6-8 series are virtually identical to the ones used in the Bravia XBR6 line. Samsung makes the panels in a jointly owned factory. If you buy a Bravia, you're basically paying more for a Samsung.

[XxDeadlyxX]

Went yesterday and bought a Bravia KDL-40V4000 (was able to get the extra cash required). I have been able to get it to input 1080p/24 fine (says so on the screen at the top).

So who is correct, Jon or Medion? I haven't done much A/B testing between 60hz and 24hz however I *think* 24hz is slightly smoother in PDVD8, haven't confirmed yet though. Medion, would this tv fit into the same category as the 5-series due to having no 120hz?

And yes I get the slight stutter every 30 seconds too.

[XxDeadlyxX]

Ok so I've done some more testing and it seems that 24p is ever so slightly smoother than 60hz, however I get the jitter every 20 seconds or so, I'm still trying to decide if its worth it or not to keep 24hz enabled :(

[Jon]

Ok so I've done some more testing and it seems that 24p is ever so slightly smoother than 60hz, however I get the jitter every 20 seconds or so, I'm still trying to decide if its worth it or not to keep 24hz enabled :(

A jitter every 20 seconds is more likely a problem with pdvd than the 24hz mode. I watch all my blurays in this mode off the PC and PS3 and don't have any problems with it.

I picked the scene from Batman begins where it slowly moves across the mountains... and I would always notice a little bit of a jitter there and then I started to notice it in all films... But the jitter would always be in specific places, usually when the camera was panning horizontally. They were not at fixed intervals. With the 24hz mode, it looks totally smooth to me now.

[Medion]

Went yesterday and bought a Bravia KDL-40V4000 (was able to get the extra cash required). I have been able to get it to input 1080p/24 fine (says so on the screen at the top).

So who is correct, Jon or Medion? I haven't done much A/B testing between 60hz and 24hz however I *think* 24hz is slightly smoother in PDVD8, haven't confirmed yet though. Medion, would this tv fit into the same category as the 5-series due to having no 120hz?

And yes I get the slight stutter every 30 seconds too.

The Bravia XBR6 is 120hz. Your model isn't an XBR, it's just a V-series, which is arguably comparable to the Samsung 5-series. As for who's right regarding 24p playback, best to just consult the experts at AVSForum. While I was shooting from the hip, seems most of them agree with my stance.

http://www.avsforum.com/avs-vb/showthread.php?t=1023121

[Toss3]

A jitter every 20 seconds is more likely a problem with pdvd than the 24hz mode. I watch all my blurays in this mode off the PC and PS3 and don't have any problems with it.

I picked the scene from Batman begins where it slowly moves across the mountains... and I would always notice a little bit of a jitter there and then I started to notice it in all films... But the jitter would always be in specific places, usually when the camera was panning horizontally. They were not at fixed intervals. With the 24hz mode, it looks totally smooth to me now.

I think it's a vista specific issue as I have it with all my playback programs. VLC, mpc HC and pdvd all suffer from it. And it's completely random for me, but at a steady interval of ~30seconds.
Both ATi and nvidia suffer from it, but the problem can almost be eliminated on ati cards by the use of powerstrip. Here (http://www.avsforum.com/avs-vb/showthread.php?t=967710&page=2)'s a thread about the issue over at avsforum.com

[XxDeadlyxX]

Yeah also aside from the jitter issue, 24hz also has issues with lip sync after pausing the movie for awhile, so I've put it back to 60hz and all is good again. I may have paid a bit more than I intended, but I'm glad I got a screen that works well with DVI-HDMI (based on Jon's post, thanks!), if I'd got one that wouldnt display properly from PC I would have been screwed.

Anyway, 60hz isnt that unsmooth anyway, still looks great IMO (nana2) So even if I'd got a "real" 5:5 120hz screen, I wouldnt be using 24hz probably anyway due to the issues.

[Lyme]

The jitter that your seeing is due to the conversion from 24hz to 60fps. Typically what most regular software will do is take the 24 frames and blend the frame before and after to generate a new frame, this brings you up to 48fps. The difficulty is when you need to generate the other 12fps, how you do it, and when you place them. Depending on how good the software is, and how fast your computer is, the additional 12 frames a second can go unnoticed, but if you do a bad job you'll get a stutter.

I find using the built in hardware decoders helps the most (newer cards), while the older ones need to brute force it with cpu time.

http://encyclopedia2.thefreedictionary.com/telecine