1080p24p/60p 120 hz confusion...?

Question

i'm looking into getting a new sony lcd WITHOUT the 120hz option. i noticed that the sony lcd im looking at ( KDL-40S4100) has a 24p input option with blu-ray. does this mean that since it has a 24p input option with the blu-ray player that the need for a 120hz lcd is pointless? i understand the need for the 3:2 pulldown when you have a 60hz tv trying to display 24fps film. im just a little confused about this option with blu-ray. if this is the case, does this hold true for upconverted dvd's or is that where the need for 120hz lcd's comes in to play. thanks!!!

Answer 1

the 120 hz is the same as the 24 fps it just the refresh rate per screen for the image on screen. Nice one for choosing  a sony you can't do much better than that anyway

Answer 2

There are two advantages to the 120Hz:

1) Uniform motion of objects in the picture is much smoother, eliminating "trails".    This is true for both video (60Hz) and film (24Hz) sources.  This is a result of the interpolation of the extra frame from 60Hz sources.  (For 24Hz  sources, see below.)

2) if the set accepts 24p input, that works out to exactly 5 120Hz frames per one 24Hz movie frame, and that eliminates "judder".  Judder comes from the fact that to convert 24Hz to 60Hz, one 24Hz frame produces 3 60Hz frames and the next will produce only 2 60Hz frames (3-2 pulldown).  This uneven duration of display time causes non-uniform motion display.  In addition, the 5 120Hz frames generated from the 24Hz frames are "interpolated" so that film "jitter" (the jerky display because of the slow frame rate) is reduced greatly.

In summary, if you are getting blu-ray, especially if you plan to watch a lot of film-originated material. 120Hz is the way to go.

The 24Hz output of a DVD player, both blu-ray and standard, can be a perfect replica of the original motion picture frame sequence.  This is because the frames are "flagged" when recorded on the DVD, so it is possible for the circuitry to identify which frame to output at 24Hz and not  output identical frames in sequence.  So the 24hz  benefits apply to both upconverted standard and blu-ray DVDs (played on a blu-ray player).

Answer 3

the more stuff they use - the more confusing it gets and no ones seems to know for sure --  1080p/24 would be the best setting if you are watching a blu ray thats encoded that way - if your blu ray player can send it out at 1080p/24 and your TV can accept it - then that should give you the best picture --  now the 120hz thing - not sure how good that works - i have a sony with it and i have a samsung with it -  depends on the material you are watching - it can make a difference and sometimes it can make it look worse -  if thats the case - you can always keep if off or on low -   these tech. is not perfected but getting better -   on Reg. dvds -  i dont think you will get 1080p/24 --   they were never made that way from the start -  they can be upconverted to 1080p either from the dvd player  or the TV will do it -    ever TV will up convert to the native screen --  so you really dont need a upconvert player but a good upconvert player can work and usually does a better job then the TV - so its worth it -   at this point - i just got a blu ray player now -from walmart - magnavox and very happy with it - works very nice and upconverts very nice also - price was great too - plus $100 gift card on top of the low price - cant go wrong