[opendtv] Re: HDMI capture
- From: "Adam Goldberg" <adam_g@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Sun, 25 May 2008 16:01:55 -0400
John,
It clearly wasn’t just the BF, if as you say, it’s generally broadcast. My
best guess has to do with the CGMS-A being set to copy never. Or, more likely,
both bytes set to ‘111 1111’, which would yield Macrovision turned on, Copy
Never, Broadcast Flag and Analog Source. Either of the first two could yield a
refusal to record reasonably.
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of John Willkie
Sent: Sunday, May 25, 2008 2:23 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: HDMI capture
No disagreement there, Jim.
NBC is in the process of upgrading all of its affiliates to new satellite
modems. (The existing units came from Tiernan.) I could check with Tiernan,
but I doubt that their legacy units permitted customizing waternarks for
individual stations.
I also doubt that a watermark that simply enables one to say "this content was
stolen from NBC" has much value. On the other hand, being able to trace the
leakage point to individual cable/satellite/IPTV/VOD customers would seem to
have great utility.
Being able to trace the leakage to individual NBC stations would also seem to
have negligible value, but that would require either station-specific bits
coming out of the satellite modem, or anyway going into the transport stream
encoder.
Come to think of it, a Chief Engineer at an NBC affiliate (and an OpenDTV
lurker) told me in a meeting at NAB that the new units were going to be rolled
out after the sweeps ended (which would be last Wednesday night). I was
thinking that the new satellite modems could account for this, but it's hard to
imagine that they were put in service in the middle of a sweeps rating period.
I would really like to get a transport stream capture of a program segment
where users couldn't save the content in Vista/MCE. I'd like to get to the
bottom of what system bits were present. Wouldn't it be funny if this had
nothing to do with the rc_descriptor (broadcast flag) and much to do with the
compression layer?
John Willkie
-----Original Message-----
From: James Albro
Sent: May 25, 2008 11:00 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: HDMI capture
Watermarks can survive multiple re-encodings and could be applied at the source
without anyone further down the chain being aware of them.
Jim Albro
----- Original Message -----
From: John <mailto:johnwillkie@xxxxxxxxxxxxx> Willkie
To: opendtv@xxxxxxxxxxxxx
Sent: Sunday, May 25, 2008 1:56 PM
Subject: [opendtv] Re: HDMI capture
Richard;
In general, this is "possible." However, the information you provided was
either prospective, or relating to the IPTV market. This was, simply, a
broadcast situation. NBC's content is encoded from 45 mb feeds at broadcast
stations, and this is not a feature of broadcast encoders. Yet.
John Willkie
-----Original Message-----
From: Richard Hollandsworth
Sent: May 25, 2008 12:17 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: HDMI capture
Video programs are being "watermarked" at several steps in the
distribution chain so that when a video shows up as an
unauthorized BitTorrent release, the owner of the cable box can
be traced....also if it's an inside job at headend. For example:
http://www.drmwatch.com/article.php/3680811
http://www.contentinople.com/author.asp?section_id=431&doc_id=145886
holl_ands
==================================
ShLampen <shlampen@xxxxxxx> wrote:
Gefen does offer a box that converts to SDI with the HDCP turned off. However,
you have to sign a release that says all the content you intend to run through
the box you OWN yourself. Not sure how they would police that!!!
Steve Lampen
Belden
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