[opendtv] Re: Mortgage stuff
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 20 Mar 2008 11:54:36 -0400
> Sorry Bert, but the FCC DID mandate ATSC receivers in any
device that can receive FTA broadcasts;
Yes, Craig, the FCC only requires the ATSC receiver in devices meant to
use ATSC -- FTA receivers. Is that illogical?
YES.
The vast majority of devices that contain ATSC receivers are not and
probably never will use those tuners.
But if you prefer to
become beholden to a walled garden, guess what? You don't need to worry
about ATSC. And the FCC is not forcing you to.
Sorry, while I do not need to use the ATSC tuner, I still have to pay for it.
And this is because the FCC mandated that TVs include the ATSC tuner.
> YOU are making the assumption that these packets contain
synchronous video. A-90 assumes that the purpose of a data
broadcast standard is to deliver something OTHER than MPEG-2
video, for which there is already support.
A/90 allows both.
Not exactly. I can't find the specific language in the standard,
however, you are not supposed to deliver MPEG-2 video using the Data
broadcast standard - this is illogical anyway, as it only adds
overhead.
The standard does support both synchronous and asynchronous data
broadcast applications. perhaps this is what you are referring to.
And I forgot that they did provide an escape clause to deal with
direct encapsulation of data packets into the MPEG-2 TS.
10. DATA PIPING
This data broadcast standard defines data piping as a mechanism for
delivery of arbitrary
user-defined data inside an MPEG-2 transport stream. Data is inserted
directly into the payload
of MPEG-2 transport stream packets, and none of the Sections, tables
or PES data structures
defined in this standard are required. In other words, no methods are
specified in this standard
for fragmentation or re-assembly of data sent in this manner, and all
interpretation of the data bits
shall be application defined. However, the Service Description
Framework information shall be
provided as defined in section 12 of this standard. Likewise,
announcement and scheduling of
data piping-based data services shall comply with requirements in
section 11 of this standard.
Any use of the adaptation fields in Transport Stream packets shall be
compliant with [11].
In essence this obviates the need for A-90, although the standard
does describe extensions to PSIP to deal with the announcement of
where to find data piping services.
Regards
Craig
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