60 Hz vs. 24 Hz

[JimSmith]

I just received a new Sony Blu-ray player for Christmas, it's a new BDP S3200 and it's 24 Hz. I think that my old player is 60 Hz. What's the difference exactly between 24 Hz and 60 Hz?

[Midnight Rambler]

Originally Posted by JimSmith

What's the difference exactly between 24 Hz and 60 Hz?

About 36 Hz ...

[kpkelley]

It's referring to 24 frames per second, which is the typical rate at which films are displayed theatrically(The Hobbit films are 48fps). Your new player probably has the ability to output 24 fps to your television.

[CtrlCtrlFast]

I have never heard of a 60hz bd player but I do know that TVs can be 60hz, which refers to how quickly the tv refreshes the screen. With a 60hz TV, the screen refreshes 60 times per second. A 60hz TV is unable to display a 24hz signal, as 60 is not evenly divisible by 24. You would need a 120hz TV or higher in order to display a 24hz signal.

[JimSmith]

Originally Posted by CtrlCtrlFast

I have never heard of a 60hz bd player but I do know that TVs can be 60hz, which refers to how quickly the tv refreshes the screen. With a 60hz TV, the screen refreshes 60 times per second. A 60hz TV is unable to display a 24hz signal, as 60 is not evenly divisible by 24. You would need a 120hz TV or higher in order to display a 24hz signal.

I swear to god I noticed subtle differences in picture quality between my new sony 24 Hz Blu-ray player and my older Blu-ray player. The new player isn't as good.

[phelings]

Originally Posted by JimSmith

I swear to god I noticed subtle differences in picture quality between my new sony 24 Hz Blu-ray player and my older Blu-ray player. The new player isn't as good.

You need to thoroughly go through all the menus and settings of your player to see if it includes any picture processing tricks . If it does make sure they're off.

[phelings]

Originally Posted by JimSmith

I just received a new Sony Blu-ray player for Christmas, it's a new BDP S3200 and it's 24 Hz. I think that my old player is 60 Hz. What's the difference exactly between 24 Hz and 60 Hz?

Tech heads will tell you to watch Bluray discs with your 24p output set to on . Supposedly improves the picture depending on your setup.

As some tv's are not 24p compatible its likely that the 24p is switched off in the player and requires you to switch it on.

If you don't switch it on your discs will play at 60hz.
Here in the UK some of our discs play at 50hz , most at 60hz if 24p not switched on.

I've never noticed any difference with 24p on except that a handful of discs have lipsynch issues with it on . Never found out why and thats something you may never see as I have only a very few discs where it happens.

I only view on 42" so maybe a larger screen will show an improvement but I'm betting if you switch it on you won't notice any change

[schan1269]

I'll chime in further...

My, non basic, Panny plasma all have a 48hz option. I've checked. It really is 48hz. No pulldown, period.

I have two(same model) Hitachi Director Series ALiS panels that have...in the service menu, all sorts of frame rates to choose from.

With those, I can actually set them at 50hz. The sets "act funny" till I send them a 1080i/50(or 720P/50) signal from any one of my various DVD and BD players set native(meaning 50 -> 60 is turned off).

So, not all of us have to deal with pulldown or 50/60 conversion.

[Kryptonic]

My UT50 has a 48hz mode...and it's not good and produces a lot of flicker. It's unwatchable.

[HDTV1080P]

All or most flat panels that offer the 48Hz feature have a flicker or unwatchable flicker at 48Hz. Turning down the brightness sometimes helps. A minimum of 60Hz on North American models is needed to eliminate the flicker. The old Pioneer plasmas from 2006-2008 have 72Hz which is flicker free.

The 48Hz feature is no longer being offered on flat panel screens. In addition, since plasmas are no longer made the flicker free 72Hz feature is gone and the 96Hz feature is gone. All new flat panels are now 60Hz, 120Hz, 240Hz or higher.

High-end DLP projectors offer flicker free 24Hz or flicker free 48Hz for lower end models. DLP projectors have no black time or very little black time, and it’s the black time that causes the flicker. The ideal flat panel display should operate at 24Hz with no black time and no flicker, however in reality such a technology does not exist for flat panel screens so multiplies of 24Hz is needed on flat panel screens to eliminate the flicker (72Hz and above or 60Hz with 3:2 pulldown judder).

[schan1269]

Funny, I don't notice "flicker" on my calibrated plasma when using 48hz mode.