[opendtv] Re: HDMI capture
- From: "Adam Goldberg" <adam_g@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 28 May 2008 07:54:41 -0400
Well, either there's a contract which requires compliance with CGMS-A, or MSFT
traded compliance for something (as Tom suggests), /or/ MSFT was afraid of the
content industry and decided discretion was the better part of valor and is
respecting the CGMS-A 'to be safe'.
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of Tom Barry
Sent: Wednesday, May 28, 2008 7:36 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: HDMI capture
Adam Goldberg wrote:
> I'm just guessing here, but there may be some compliance rules relating to
> some technologies that are incorporated into Vista which require that
> incoming CGMS-A be respected.
>
Well, I'm not aware of any such thing. So unless we are at the point of
stealth law covered under NDA we have to assume MSFT voluntarily agreed
to such compliance as part of some deal.
But anyone feel free to point out any binding legislation that would
force this on anyone.
- Tom
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
> Behalf Of Tom Barry
> Sent: Tuesday, May 27, 2008 11:14 PM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: HDMI capture
>
> The interesting part is not (mostly) which bits were set but rather that
> Microsoft still claims their software was acting as intended by
> purposely suppressing recording for ANY combination of flags that can be
> set in the stream. That is, they admit they have willfully given
> broadcasters the ability to turn off recording (and commercial skipping)
> to Vista Media Center.
>
> Imagine purchasing a VCR with this feature. Most people would pay less
> for it if they knew.
>
> - Tom
>
> Ron Economos wrote:
>> This post from an engineer at KNTV seems to indicate it was an XDS issue.
>>
>> http://tech.groups.yahoo.com/group/HDTV-in-SFbay/message/25315
>>
>> Ron
>>
>> John Willkie wrote:
>>> Adam;
>>>
>>> CGMS in the XDS data of a CEA-708 (CEA-608 subset) data stream?
>>>
>>> While I don't have contemporary streams from NBC-operated TV stations,
>>> in the ones I have (a few months old) I find analog captons on KNSD
>>> and analog and digital captions on KNBC (no caption service descriptor
>>> on either.)
>>>
>>> It would be interesting if this comes down to NBC's lack of adherence
>>> to ATSC standards. (A/65 at 6.9.2 states (in part)
>>>
>>> "This descriptor shall appear as a descriptor in the descriptor()
>>> field for each EIT event that has one or more closed captioning
>>> services during some portion of the event"
>>>
>>> combined with how MCE deals with the ambiguity caused by just this
>>> point of non-compliance.
>>>
>>> The CBS streams I have do have the caption_service_descriptor.
>>>
>>> I'd parse the streams farther, but I've been held up the last three
>>> days while I attempt to install the Windows 2008 Server SDK ...
>>>
>>> Perhaps it's a MS conspiracy to keep me from installing the latest
>>> help files and samples.
>>>
>>> Come to think of it, I did get a web site hit a few weeks back from
>>> Microsoft corp -- somebody was looking for an ATSC transport stream
>>> validator.
>>>
>>> John Willkie
>>>
>>> -----Original Message-----
>>> From: Adam Goldberg
>>> Sent: May 25, 2008 1:01 PM
>>> To: opendtv@xxxxxxxxxxxxx
>>> Subject: [opendtv] Re: HDMI capture
>>>
>>> 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.
>>>
>>>
>>>
>
--
Tom Barry trbarry@xxxxxxxxxxx
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