[opendtv] Re: 70th Anniversary Blu-ray and standard DVDs of the Wizard of Oz

  • From: "Stessen, Jeroen" <jeroen.stessen@xxxxxxxxxxx>
  • To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
  • Date: Thu, 1 Oct 2009 17:13:47 +0200

Hello again,

My mail feed was erratic when I wrote this (below), so I had not yet seen
the remainder of the thread. I understand now that Cliff has used the
NTSC output (or other Y'PbPr SD outputs) to connect to an SD 4:3 monitor.

It is also becoming obvious that the BluRay disc in question contains a
pillarboxed signal (4:3 content in a 16:9 format). Let's assume that this
is a valid format for HDTV content, and full-frame 4:3 is not a valid
HDTV format. (It exists on DVD, but it does not exist on BluRay.)

DVDs can contain 4:3 movies, and DVD players and BluRay players that play
DVDs, can output this 4:3 content to a 4:3 monitor. They can also letterbox
or pan-scan 16:9 content to a 4:3 monitor. The players have menu options
to make this choice - for SD content !

But what is apparently not possible is to play a BluRay (= HDTV) disc on
a BluRay player to any 4:3 display, be it SD or HD. To put it simply: that
is not a valid use case for BluRay. Get a 16:9 HDTV display. (Or 21:9)

What else would you buy a BluRay player for ? HDTV is not meant for 4:3.
4:3 content lives on DVD, and even there it is a minority (in Europe).

I fully understand your reasoning that this problem *could* have been
solved, by removing the black pillars. But in order to be solved by the
manufacturer of the BluRay player, it must first be recognized as a valid
use case, then it will be specified, maybe it will even be standardized,
and then it will be solved. Apparently this was not meant to be so.

I'm speaking only for myself. I know absolutely nothing about development
of BluRay players for Philips. I'm supposed to know all about displays.

Groeten,
-- Jeroen

  Jeroen H. Stessen
  Specialist Picture Quality

  Philips Consumer Lifestyle
  Advanced Technology  (Eindhoven)
  High Tech Campus 37 - room 8.042
  5656 AE Eindhoven - Nederland






> -----Original Message-----
> From: Stessen, Jeroen
> Sent: Thursday, October 01, 2009 16:50
> To: opendtv@xxxxxxxxxxxxx
> Subject: RE: [opendtv] Re: 70th Anniversary Blu-ray and standard DVDs of
> the Wizard of Oz
>
> Hello,
>
> Cliff Benham:
> > Bert, it is only a 4:3 monitor, so it doesn't have a switch to change
> between 4:3 and 16:9.
>
> I'm with Bert on this one.
> If I understand correctly, you have connected a 4:3 (computer) monitor
> to the HDTV output of a BluRay player ? But this is wrong, an HDTV
> display is implicitly 16:9 (or 21:9). There are no 4:3 HDTV formats in
> the ATSC table 3, therefore there are no such signals or displays.
> You can not blame a BluRay player for sending the "wrong" signal to a
> display that is not supposed to exist.
>
> A 4:3 movie is always pillarboxed to a 16:9 signal for display on a 16:9
> display. There exists no output mode that is compatible with 4:3 displays.
> You should not connect 4:3 computer monitors to HDTV signals, just because
> they can handle the line and frame rates. It is an undefined use case.

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