[opendtv] Re: Analysis: Should Apple Buy Hollywood?

  • From: "Mike Tsinberg" <Mike@xxxxxxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Wed, 7 Mar 2012 15:53:47 -0500

Actually when deinterlacer deals with movies and it should detect 24 F/s
cadence (3/2 pull-down) it should switch to recovery of 24 F/s progressive
video and convert it into 60 F/s video. Of course converting it to 72 F/s or
120 F/s is much better because of integer relationship. The implementation
of conversion to 60 F/s sometimes is not so good because of 5/2 relationship
between 24F/s and 60 F/s. So in case of movies you should see no interlace
artifacts only strange motion jitter on 60 Hz TV's. It should look much
better on 120 Hz TV's

 

Mike Tsinberg

 <http://keydigital.com/> http://keydigital.com

 

 

 

From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of dan.grimes@xxxxxxxx
Sent: Wednesday, March 07, 2012 3:20 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: Analysis: Should Apple Buy Hollywood?

 

Mike Tsinberg wrote:

"Current state of the art consumer deinterlacers (TV's, STB's, Blu Ray
players) are reasonably good. Most of them use motion assisted process." 

But there is a trade-off.  By turning on the "smooth motion" (or whatever
the TV calls it), the video becomes much smoother and de-interlacing is
quite good on many modern TVs.  However, all video becomes 60 frames per
second and that is not always desirable.  For instance, movies often look
like video because of the temporal change.

Of course, turn the "smooth motion" off and the interlacing artifacts come
back.  In fact, the TV deals with it very poorly and the artifacts are
obvious and bothersome, in my opinion.  This requires me to go to this
deeply buried menu setting quite often.

Dan

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