[opendtv] Re: News; Dish to Expand HD Roster, Offer 1080p Movies

  • From: "Martin Holmes" <Martin.Holmes@xxxxxxxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Sun, 3 Aug 2008 23:10:56 +0100

For brevity and accuracy, you should use 23, 29 or 59 when referring to
delivery of television industry based content then.

I really want to discuss 1080 @ 59p. Not film, or filmic looking video
at 23 which works today in the existing infrastructure.  MPEG 2 allows
for repeat next field used to add 2:3 in the output of a suitably
equipped decoder or STB.  Making film or filmic looking materials at 59
involves the addition frame based 2:3 which does not utilize the
bandwidth efficiently (IMO) when the original source materials only
change at 23Hz.  Again use of 2:3 removal and flags to reinsert in the
decoder would be utilized.

Making 23p (filmic looking) from 29i (video) is very difficult indeed
and requires special hardware to do it in real time.

As a disclaimer, my mortgage is paid by a company that makes converters
of this ilk.  MH.



-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx]
On Behalf Of John Shutt
Sent: Sunday, August 03, 2008 8:14 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: News; Dish to Expand HD Roster, Offer 1080p
Movies

Sorry, Bert.  Earlier I missed your point entirely.

Blu-Ray video needs to hold up in resolution and (lack of) macroblocking

frame by frame for the entire movie.  People will slo-mo the video,
pause 
it, zoom in on it, etc., so I can understand the higher bitrate.

Apparently, conversion from 1080i30 to 1080p24 requires a specialized
cross 
converter.  The "cheap" one we have here at the station will only cross 
convert between 30i and 60p. (Miranda XVP-1801)  It is much easier, 
apparently, to convert 1080p24 back to 1080i30 or 720p60 through a
simple 
3:2 pulldown.  (All frame rates also imply the 1.000/1.001 versions but
are 
omitted for brevity.)

But you have a very legitimate point that 99% of PBS programming would
not 
be affected by 24p.  We don't do much live sports, unless you count
Ballroom 
Dancing.

John

----- Original Message ----- 
From: "Albert Manfredi" <albert.e.manfredi@xxxxxxxxxx>

> So why aren't OTA broadcasters making a big to-do about this "full HD"

> they already have, that anyone can already use?
>
> Bert

 
 
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