[opendtv] Re: 4:3 transmissions of syndicated programming
- From: "Adam Goldberg" <adam_g@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 3 Mar 2008 17:11:59 -0500
Sorry, no comment.
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of John Willkie
Sent: Monday, March 03, 2008 2:43 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 4:3 transmissions of syndicated programming
John;
I, too am talking about the S259M and S292M level. I'm not saying that
there are many solutions out there, and I'm not saying that there is ongoing
SMPTE work on these items, but this can be unambiguously signaled within the
facility.
Nor am I saying (cue Adam G.) that these are fully implemented in TV sets.
In a recent filing with the FCC, Tribune Broadcasting asserted that
virtually all U.S. broadcast stations would be using encoders capable of
processing afd by Feb 17, 2009. I thought that was a bit over-the-top, as
predictions go.
John Willkie
-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de John Shutt
Enviado el: Monday, March 03, 2008 11:29 AM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: 4:3 transmissions of syndicated programming
John,
I'm talking about at the SD-SDI level, not the ATSC level.
John
----- Original Message -----
From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Monday, March 03, 2008 2:21 PM
Subject: [opendtv] Re: 4:3 transmissions of syndicated programming
> John;
> Actually, there are two different schemes for signaling the "active video"
> portion of the video frame. They are mutually-exclusive.
>
> Active Format Description is an optional feature of A/53 (and has been in
> there for a few years) and pan/scan / bar data is an optional feature of
> MPEG-2. AFD goes into mpeg-2 picture headers, pan/scan and bar data are
> descriptors.
>
> There are mechanisms for communicating these in MXF, in SDI/HD-SDI, etc.
>
> John Willkie
>
> -----Mensaje original-----
> De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
> nombre de John Shutt
> Enviado el: Monday, March 03, 2008 11:02 AM
> Para: opendtv@xxxxxxxxxxxxx
> Asunto: [opendtv] Re: 4:3 transmissions of syndicated programming
>
> Bert,
>
> I see your point there, and that is a decision made by the syndicator, not
> the broadcaster. However, it will either be a 4:3 SD letterbox, or a 4:3
> full screen. The infrastructure just isn't there at most stations for
> mixing 4:3 and 16:9 SD programming, even though the equipment is
> available.
>
> The biggest drawback is that there is no standard way of automatically
> signaling video as 4:3 or 16:9. If there were, then it would be much
> easier
>
> to store anamorphic 16:9 alongside 4:3 within a video server, and have a
> downstream format converter either pillarbox the 4:3, or alternately
> letterbox the 16:9 automatically on a clip by clip basis.
>
> I see tons of letterboxed SD programming on PBS and on the cable networks.
> As such, I have not heard of any viewer objection to letterboxing per se.
>
> My own personal preference is for a 14:9 SD letterbox of 16:9 material.
> Makes a good compromise between maintaining staging for 16:9 and
> minimizing
> wasted screen area on 4:3 TVs.
>
> John
>
>
>
>
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