Displays that support 1080p/24 signal at multiplies of the original frame rate
文章中詳列了各廠家能成功處理24p電 ...
len1978 發表於 2010-8-30 12:10 http://www.hd.club.tw/images/common/back.gif
看來我要更新我的資訊了。可是怪的是裏面的機器或多戓少都看過，但感覺起來都不像正常的樣子。也許是lcd類有殘影的問題，所以看起來不像48hz吧。
看來我要更新我的資訊了。可是怪的是裏面的機器或多戓少都看過，但感覺起來都不像正常的樣子。也許是lcd類有殘影的問題，所以看起來不像48hz吧。 ...
r88522726 發表於 2010-8-30 14:16 http://www.hd.club.tw/images/common/back.gif
下午上網查了一下 "24p judder" 的文章，還不少文章有提到這個東西，但都是一些舊文。
為了想了解XVT能不能真的作到5:5 PULL DOWN的效果(美國官網的介紹只提到3:2 pull down跟2:2 pull down...)，再去找了一下關於vizio XVT使用者的討論文，許多人對於機器的設定情況不同，感受也不同...但因為並不是像雜誌社那樣專業的評測。
所以看來看去得到的結論是....買一台回家自已玩可能會比較快找到答案=.=
不然就是多存一些錢，以後再買廠商SPEC上有提到5:5 pull down的TOSHIBA跟LG了..。 本文章最後由 len1978 於 2010-8-30 18:25 編輯
轉貼一篇舊文(2008年)參考：
Samsung: What Samsung 1080p @ 120Hz LCDs support 5:5 pulldown
Allow me to clarify
bySamsung_HD_Tech
I didn't mean to let your post go stale. Thanks for following up.
120Hz, by the very design of 120Hz, is that a signal coming in at 24Hz would mathmatically be displayed 5 times.
24Hz x5 = 120Hz
The 120Hz panel will always show 120Hz; it is incapable of showing a native 60Hz, and would therefore double it.
So it would be pretty fair to deduct that a signal at 60Hz would be displayed twice, and a signal at 30Hz would be shown 4 times, and a signal at 24Hz would be shown 5 times
The benefit is that each frame is shown evenly, which is helpful in reducing judder.
The benefit of 120Hz is that it can display 24Hz, 30Hz and 60Hz evenly without an uneven pulldown requirement necessary. This way, the picture wouldn't be marred by interpolation.
Even with processing such as AutoMotion Plus, the signal will still be shown 5 times at 120Hz, just with picture enhancement added for smoother motion. (Of course, this is defeatable for the "true" theater videophile... but that's a whole other topic!)
3:2 pulldown will make 5 frames out of four. So it will show odd frames for 50 milliseconds, and even frames for 33. At 120Hz, each of the 5 frames will be on the screen for 42 milliseconds. To really achieve this, however, you need a source content that is shown in 24fps, and that translates into a Blu-Ray player 24fps capable with a 24fps version of a movie.
We probably wouldn't officially announce this in, say, a press release, since it's somewhat of an industry understood thing. But questions like this are absolutely appropriate in forums.
Regards,
--HDTech 本文章最後由 len1978 於 2010-9-4 14:29 編輯
轉貼：Files For Judder Test
avforums有位仁兄提供了1920 X 1080的JUDDER TEST FILES。
文章連結內有提供下載檔。
23.976.mkv
24.000.mkv
25.000.mkv
29.970.mkv
30.000.mkv
59.940.mkv
影片內容是以黑白條紋橫向移動的方式來觀看JUDDER效果。
有興趣的網友可以下載來測試看看有沒有發現到白色條紋的「抖動現象」。
http://www.avforums.com/forums/streamers-network-media-players/1175436-files-judder-test.html
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