1080p signal on new 120hz tv's - High-Def Digest Forums
Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 07-02-2007, 05:49 PM
mmmmDoNut's Avatar
Senior Member
Thread Starter
 
Join Date: Feb 2007
Posts: 1,107
Default 1080p signal on new 120hz tv's

Not sure where to put this but figured since new tv's coming out support 120hz I would post the question here.

In order to use one of the new 120hz sets showing up will either of the HD players need an update to output the video at the faster speed or would you output the video at either 24fps or 60fps and let the TV make the necessary adjustments. I'm assuming its the later with outputting at 24fps as the preferred method.

Thanks
Reply With Quote
  #2  
Old 07-03-2007, 03:21 PM
Banned
 
Join Date: Jan 2007
Posts: 5,360
Default

The TV receives the signal (be it 60Hz or 24Hz) and duplicates frames to create 120Hz.

60Hz material will display the same frame twice, and 24Hz material will shown 5 times (depends on the processing in the TV).
Reply With Quote
  #3  
Old 07-03-2007, 04:58 PM
mmmmDoNut's Avatar
Senior Member
Thread Starter
 
Join Date: Feb 2007
Posts: 1,107
Default

Thanks Glocks.
Reply With Quote
  #4  
Old 07-03-2007, 08:01 PM
Banned
 
Join Date: Jan 2007
Posts: 5,360
Default

Check out this post for an explanation of how different manufacturers use different means.
Reply With Quote
  #5  
Old 07-08-2007, 02:12 PM
JU1CYFRU1T's Avatar
Senior Member
 
Join Date: Oct 2006
Posts: 1,357
Default

Just a little note for the future... you will almost ALWAYS want your source to output at it's native resolution/rate. Exceptions are great upscaling players (like the XA2 upscaling SD DVD to 1080p with the Reon VX), but they are the exception rather than the rule.
Reply With Quote
  #6  
Old 07-09-2007, 01:20 PM
Banned
 
Join Date: Jan 2007
Posts: 5,360
Default

Quote:
Originally Posted by vooswing View Post
It just seems to me that at some point our eyes aren't capable of noticing a difference. 24 fps works in a movie theater on a 30' screen without any noticable problems, do we really need 120 fps on a 60" screen?
Yes you can notice the difference. It's not detail, it's in progression. In pans with 3:2 pull-down the image jerks. You don't have pull-down with 120Hz (at least not pulldown with uneven frames).
Reply With Quote
  #7  
Old 07-09-2007, 02:43 PM
JU1CYFRU1T's Avatar
Senior Member
 
Join Date: Oct 2006
Posts: 1,357
Default

Quote:
Originally Posted by vooswing View Post
This reminds me of the 1080i vs 1080p debate.

Will there be any advantage of 120hz over 60hz?

It just seems to me that at some point our eyes aren't capable of noticing a difference. 24 fps works in a movie theater on a 30' screen without any noticable problems, do we really need 120 fps on a 60" screen?
Yes, you will see a slight difference. The advantage of a 120 hz refresh rate is in the fact that there is no need for cadence detection/ adaption.

On current 60hz displays (like mine), a 24 fps signal fed to my display *must* be converted to 60 fps (2:3 conversion). With a 120 hz display, there is no conversion... they simply repeat the same frame 5 times... maintaining a smooth picture (24 fps source). With 30/ 60 fps sources, it's a direct 4 or 2 frame repeat (respectively). With this system, objects in motion (on a 24 fps source) will look smoother.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
which is better picture - 1080p 120hz or a 720p 600hz? shark420 Home Theater Gear 6 01-22-2010 11:52 AM
Westinghouse Ships 42 120Hz 1080p LCD for Only $750 Attebery Home Theater Gear 13 10-04-2009 11:47 AM
VIZIO 42 INCH 120HZ 1080P FOR ONLY $847 at Walmart (true 5:5 pulldown mode) HDTV1080P Home Theater Gear 4 09-14-2009 04:47 PM
Sony 52 Bravia XBR120hz Or Samsung LN52A650 52-Inch 1080p 120Hz NYRedBullFan Home Theater Gear 12 12-13-2008 05:01 AM
120HZ 5:5 PULLDOWN 1080P/24 DISPLAYS AS LOW AS $699 FOR 32 INCH and $899 FOR 37 INCH HDTV1080P Home Theater Gear 2 11-29-2008 06:04 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off