QUOTE(Ngto @ Dec 10 2007, 10:06 PM)
I think you have mixed up what we were discussing. We are discussing one thing and you are talking about another.
My point is , If you want to input 24p then the best combination is with a 120Hz TV.On A 100Hz TV which can input 24P, there will still be judder because of the uneven match (24p can't be multiplied to exactly match 100Hz frequency) . It will have to use some sort of technique to fill in the missing frames. How well the manufacturer implements the technique will determine how smooth the video will be.
On the other hand , if you have 120Hz TV which can input also input 24P signals, it won't have to do any pulldown because it just multiply the 24 by 5 times.
btw, I only mentioned the topic of 1080P input on a panel with resolution of 768 just to show an example of how people are sometimes misled into believing that any panel which can input 1080P signal is automatically a Full HD Panel itself.
Just like how people are misled that just because the TV can input 24P , it will automatically have the optimal frequency to handle the signal smoothly.
The two examples are not meant to be related, other than the fact that they are sometimes used to mislead people for marketing purposes.
lets examine your point... if that's the case, why are LCD TVs promoting this 100HZ/120Hz and not plasmas? if such feature is really made primarily for anti judder 24Hz filmbased source.?
I think there are 2 main issues on implementing 100/120Hz, the main one is mostly to counter the motion blur/pixel lag primarily caused by LCD panels compared to plasma TV.
doing 5:5 pulldown is secondary benefit from double frame rate of a 120HZ TV cos the 100Hz version (obviously from PAL regions) won't be able to multiply 5 x 24 to 120.
besides, different manufacturers will have different frame interpolation technologies implemeted in this double Hz feature, so your milage may vary ..not all builtin 100/120Hz processors are equal..
on your other point of input signals, I get ya, but being able to accept a variety of input signals including the famed 1080p24 is essential especially when the next gen sources are already capable of outputting this in year 2007 (in the past, the arguement was there was no 1080p24 source so why bother), then no reason why a new range telly built in 07 onwards should be lagging behind in input signal options.
Added on December 11, 2007, 12:30 pmQUOTE(ICDeadPeople @ Dec 11 2007, 08:16 AM)
Exactly what we are discussing, 120hz will have a simpler inverse telecine for a 24p than 100hz. You can afford though to have a 100hz, 70hz or what ever freq of your LCD tv have, given it will do a proper 3:2 pulldown. And there is not many tv that can do that (according to the expert from hidefdigest). One of them is Sharp A63 model, which is why Im looking for it so desperately cos Sharp Malaysia dont have those model. Singapore have.....
you assume the current 120HZ LCD TV will do 5:5 pull down from 24fps film based source? hope you are not one of those who think 1080p input means displaying 1080p output as well.
anyway excerpts from AVS
"Heres why I suspect you might be seeing judder.
When 24FPS film is converted to 60Hz 3:2 pulldown is done on the movie. This effectively interlaces the static image but also makes motion slightly smoother, and blurrier. Effectively this causes half the image to change roughly every 1/48th of a second (not exactly, but sort of). But basically at any given time no more than half the information is updated.
In 120Hz, they simply do 5:5 pulldown, or repeat each full frame 5 times. This means every 1/24 of a second a whole new frame is shown.
You might see Judder because you are seeing crisper edges during motion due to a lack of 3:2 pulldown, since 5:5 pulldown displays the whole frame change at once. Typically 5:5 is much preferred over 3:2 due to clarity in the whole frame being updated at once instead of field based updating, but its possible 5:5 pulldown disturbs you as much as 3:2 disturbs some other people.
Just be thankful were not in Europe on 50Hz, where they either just trash a frame.... or speed up a movie by 4.2% and just hope no one notices.">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
"Krotchy,
That's a nice opinion, except for now there is NO 120hz panel actually doing 5:5 pulldown [24fps, with each original frame repeated 5 times]. Toshiba just released one that does, but it's only available in Japan currently (maybe the USA next year).
All of these "120hz" LCDs, are simply "refreshing", or doubling the current 60hz signal, by adding a newly processed frame [thru the processing chip's algorithm] between each "real" frame of the content [inside of the 3:2 pulldown process]. It's better, but definitely not the same as real 5:5 pulldown.
JVC's version of 120hz is now in its 2nd generation [new 898 series releasing this month, in 37", 42" & 47" 10-bit, 1080p panel sizes], which they dub "Clear Motion Drive II", and specifically designed for both horizontal and vertical 1080 resolution. Note: the previous 120hz version from late 2005 was only for vertical 720 resolution, in a 37" panel only.
JVC's version is combined with their excellent 32-bit Genessa processing chip, along with their great 5th generation D.I.S.T. scaler, and features accurate colors right out of the box.
See JVC's 2007 LCD displays here -
http://tv.jvc.com/main.jsp - also for more info on JVC technology and features, view the company's 2007 Press Releases here -
http://www.jvc.com/press/index.jsp"http://www.avsforum.com/avs-vb/showthread.php?t=917904This post has been edited by ar188: Dec 11 2007, 12:32 PM 
Dec 10 2007, 03:46 PM
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