[opendtv] Re: Redefining anamorphic
- From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Sat, 8 Mar 2008 23:34:33 -0800
Thanks, Ron. I took a few minutes to look at the committee draft for 2016
stored on my hard drive. And, I am happy to 'report' that I got something
confused: there is no pan/scan in ATSC or MPEG specs (it is intended, at
this point, for use within a broadcast facility), and the idea is to
transport it in the Vertical Ancillary space (VANC) of S259 or S292.
And, bar data and AFD is supported in A/53.
To relate this back to the discussion that we started, this functionality
(or manual dynamic changes) needs to be in place before afd and bar data can
be used reliably in a broadcast plant.
I have yet to see an SMPTE spec I've contributed to go all the way to a
published document, so I'm not familiar with the road map, but it looks like
S2021 (BXF) is getting very close to being published, but it would probably
be a violation of the SMPTE S22-WG10 nda for me to describe it's status, and
I'd probably make a mistake to characterize it any way.
Without the ability to transmit the needed information within the plant
(s2016), and the ability to include the information in playlists, etc
(S2021), afd is 'virtually impossible' to provision.
John Willkie
-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de Ron Economos
Enviado el: Saturday, March 08, 2008 10:41 PM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: Redefining anamorphic
SMPTE 2016.
Ron
John Willkie wrote:
>There has been some recent smpte work on transporting afd and pan/scan -
bar
>data in SDI/HD-SDI. It's somewhere on my hard-drive, but I've been having
>the weirdest problem for hours, and I haven't been able to spare the time
to
>search, or have my computer search for it. I've rebooted about 5 times in
>the last three hours. Each reboot causes me to regroup, and none of these
>reboots has been unplanned.
>
>It's been years since I did any work in this area, but somewhere I saw a
>specification for bar data. I'm not so sure about pan/scan; the more
recent
>SMPTE stuff might have confused me.
>
>There are just so many specifications and limited mental bandwidth to keep
>track of them.
>
>John Willkie
>
>-----Mensaje original-----
>De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
>nombre de Adam Goldberg
>Enviado el: Saturday, March 08, 2008 9:26 PM
>Para: opendtv@xxxxxxxxxxxxx
>Asunto: [opendtv] Re: Redefining anamorphic
>
>302M is an audio thing, I think.
>All 300 468 has is a different "component type" for streams with/without
pan
>vectors.
>
>You may be right, something may be somewhere, but it'd be news to me.
>
>Adam Goldberg
>adam_g@xxxxxxxxx
>
>
>-----Original Message-----
>From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
>Behalf Of John Willkie
>Sent: Saturday, March 08, 2008 8:43 PM
>To: opendtv@xxxxxxxxxxxxx
>Subject: [opendtv] Re: Redefining anamorphic
>
>IIRC, SMPTE S302M, and I thought it was in the DVB-SI spec, but it ain't
>jumping out for me at this moment.
>
>John Willkie
>
>-----Mensaje original-----
>De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
>nombre de Adam Goldberg
>Enviado el: Saturday, March 08, 2008 4:32 PM
>Para: opendtv@xxxxxxxxxxxxx
>Asunto: [opendtv] Re: Redefining anamorphic
>
>Where's the descriptor definition for "pan/scan - bar data"?
>
>Adam Goldberg
>adam_g@xxxxxxxxx
>
>-----Original Message-----
>From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
>Behalf Of John Willkie
>Sent: Friday, March 07, 2008 7:45 PM
>To: opendtv@xxxxxxxxxxxxx
>Subject: [opendtv] Re: Redefining anamorphic
>
>I'm sorry if what I said was confusing. I thought I was indicating that a
>PSIP generator has no ability to affect video picture metadata.
>
>However, a PSIP generator that could dynamically sample the transport
stream
>could detect if AFD was present, and if not, could inject pan/scan - bar
>data into the inner loop descriptor of the PMT entry for the video
>elementary stream.
>
>John Willkie
>
>-----Mensaje original-----
>De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
>nombre de Adam Goldberg
>Enviado el: Friday, March 07, 2008 10:33 AM
>Para: opendtv@xxxxxxxxxxxxx
>Asunto: [opendtv] Re: Redefining anamorphic
>
>Explain how a PSIP generator has any affect on AFD?
>
>
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