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24p / 120hz on Computer LCD monitor..I give up

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Old 07-02-2008, 07:33 PM   #1  
lvg
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Default 24p / 120hz on Computer LCD monitor..I give up

Hello all, this is my first post.

I've been going over this off and on for almost 8 months researching how to get that almost fake looking Blu-ray playback on a home PC monitor. Everytime I look, I get a headache because nobody has a clear answer. So here's my story...

When you go into a Best Buy or some electronics store that has a Blu-ray demo unit, they usually pair it with a HDTV that does 24p (24hz?) or 120hz. It creates that weird "too smooth, looks like live set film" effect. Is that what 24p does or is that 120hz?

Anyhow, I can't figure out why there are no LCD monitors for home PCs that do this. I keep reading about people trying to set their desktop LCD monitor to a multiple of 24hz, but no modern LCD will do 24, 48, or 72hz (and definetly not 120) at 1920x1080.

I did find this (link) but I was told this won't make that overly smooth playback as I described above. It's a desktop LCD monitor that is supposed to have a 24p mode.

FlexScan HD2452W (can't post link yet, so please google if you're interested in seeing the specifications)

So what the heck?

Explain this one - a PS3 has a menu setting to turn on or off 24p output mode. Why don't PowerDVD and WinDVD have a 24p mode option?

I just don't get it - all I want is that unrealistic smooth playback on my home computer! I don't have a 46" HDTV.

FYI -
PC is Intel E8400 / 4GB RAM / GF 9600GT / Pioneer BD-ROM / Westinghouse 24" LCD (1920x1200 / HDMI / HDCP)

Thank you,
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Old 07-08-2008, 07:20 PM   #2  
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Just thought I'd bump to see if anyone had any ideas.

Thx
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Old 07-08-2008, 07:37 PM   #3  
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I would not think there will be a video card capable of outputing in a multiple of 24p anytime in the near future. Without that there will be no use for a monitor or player to support it.
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Old 07-08-2008, 07:52 PM   #4  
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rbinck,

Actually the video display adapter itself is not the issue. Video cards have been able to output 24-120hz for many years. The problem is desktop LCD monitors. At the 1080p resolution (on most 24" LCDs and some newer 22" screens) it's impossible to set the refresh rate to 24hz or 120hz - even 72 or 48hz is difficult. The horizontal ranges are too far out to handle.

So, what I'm asking I suppose, is what's the closest way to get that buttery playback on a 60hz desktop LCD monitor? I'm not going to buy a 24/120hz 46" TV.
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Old 07-08-2008, 07:57 PM   #5  
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What video card do you have that the driver offers 24 hz as a refresh rate?
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Old 07-10-2008, 01:47 AM   #6  
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There are workarounds (Powerstrip) that allow a user to modify custom refresh rates. I have a feeling people typically customize the rates for actual an HDTV (physical 37"+)

However as I understand, any multiple of 24 - 48, 72, 96, 120 all would function the same.

For 1080p video on a PC, there are zero monitors that will do any one of those multiples, except for the supposed FlexScan HD2452W.
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Old 07-10-2008, 09:23 AM   #7  
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I do know about these workarounds and as I understand it powerDVD can be set to remove the 2:3 processing to take advantage of it. I personally have not tried it, but have read about it elsewhere. I was talking about out of the box.

The larger point I was trying to make, perhaps clumsily, is until the 24p, or multiples, is endorsed by the computer community I doubt if there will be any 24p, or multiple, monitors offered. You can get a HDTV flat panel to support 24p, I sure you know.

I suspect your real question is can I get a cheap, small computer monitor (<$300 maybe?) that will support 24p, or multiple, and I think the answer is no and probably unless vesa gets interested in 24p, or multiple, there will not be any in the near future.

Last edited by rbinck; 07-10-2008 at 09:26 AM..
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Old 07-10-2008, 03:16 PM   #8  
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Great info, thx!
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Old 07-15-2008, 06:25 AM   #9  
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interesting
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Old 07-15-2008, 07:21 AM   #10  
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Quote:
What video card do you have that the driver offers 24 hz as a refresh rate?
NVidia drivers have the capability to set custom refresh rates including 24, 24PsF, 48, 72, and 120. With ATI cards, you need powerstrip.

I am currently running 24PsF on both NVidia and ATI video cards.

The NVidia's are both 9800GTX and the ATI is n HD3870. Projector is a Sony Qualia 004.

Vern
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Old 07-18-2008, 11:44 PM   #11  
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Wow have I got news !

These guys (see link) accomplished the effect using a framerate doubler script (real-time) through AviSynth and a combination of two custom libraries, MVTools and AviSynth. I think AviSynth is a custom version made just for this process.

http://www./avs-vb/showthread.php?t=1025800

You need a pretty hefty CPU to process this script and Quad-core monsters have a hard time with 1080p material. I can't do 1080p on my E8400.

You get a REALLLY similar effect to the 120hz/cinemotion/24p feel, although it's not as refined as a real TV processor. You can get an "80%" effect compared to the real thing.
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Old 08-26-2009, 06:50 PM   #12  
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I'm not sure if it's been said yet, but 24p stands for 24 frames per second, progressive scan. The refresh rate, which I think is what the 120hz is, is important for moving objects. The higher the refresh rate, the less blurry things look when they move. It's like that commercial for some 240hz 'true motion' TV, where it shows a rocket car going across the screen, and when it gets to the TV it's crystal clear.

I'm still trying to figure out some things myself, but as far as I know, the higher the Hz the better, the higher the contrast ratio the better, the higher the framerate the better, and the lower the response time the better. I'm looking into getting this myself. It's only $480, which might be less than you expected. There's also this, a Sceptre 24" monitor with a 2ms response time that might help you get closer to that cinema feel.

Found this on wikipedia, it might help.
"With NTSC equipment, it is impossible to display a 24p signal directly as the monitors only support the 60i framerate. Hence, pulldown must be added to the 24p material to be displayed. Most editing systems will either add 3:2 pulldown or 2:2:2:4 pulldown. In the 2:2:2:4 pulldown scheme, used as a choice primarily by Apple's Final Cut Pro, every fourth frame is repeated. This scheme is easier for slower hardware to implement as it requires less processing."

Last edited by Darktangent; 08-26-2009 at 07:00 PM..
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