[opendtv] Re: News: Those licenses will soon be worthless...
- From: Ron Economos <k6mpg@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 26 Apr 2005 03:19:49 -0700
A couple of questions:
1) Why does ATSC even care about PID values, given
that no dual mode (ATSC/DVB) receiver exists or
would ever be built?
2) If a DTV station were to continue using PID's below
0x30, would they ever receive a citation (pink ticket) from
the FCC?
Ron
John Willkie wrote:
>Okay, the first item was a poke. As to the other items, I think we will
>have to agree to disagree, because there is no need to belabor our points:
>time will tell.
>
>However, I object strongly enough to the following to object:
>
>
>
>>You should understand this better than anyone. If they can't get
>>something as simple as PSIP right, how the hell are they going to use
>>demographic data to drive customized ads to specific sub markets,
>>much less individuals?
>>
>>
>
>Sure, it can be tough -- with the current divide between encoders and
>multiplexers and PSIP generators to get MPEG-2 PSI and PSIP both right and
>consistent with each other, and consistent with the elementary streams.
>
>But, it's too early to blame the broadcasters for this problem. I was
>careful at the show to talk to most of, if not all of, the companies in the
>encoder and transport stream test and measurement field. Since PSI and PSIP
>is all I know, I spotted all sorts of out-of compliance encoders and t&m
>gear that were analyzing transport streams that were out of spec with MPEG-2
>and DVB and ATSC.
>
>I have to be real careful here, and I offer a caveat: I can only mention
>the name of "bad actors" with whom I have no chance of sale/strategic
>alliance. Sometimes, what prevents a deal is a problem they have with me,
>other times, what prevents a deal is a problem with them, and in some cases,
>it's a problem with both.
>
>Encoders:
>Ligos Corporation showed an encoder that permitted, in ATSC mode, elementary
>streams on any pid from 16 to 8190. The minimum permitted now is 48; the
>maximum permitted per ATSC is around 1000 (I don't have the spec in front of
>me, and I wrote that part some months and years back. The engineer told me
>"we wrote to the spec." And, I said "you didn't use the right spec on the
>upside, and on the downside, the spec changed effective January 1, 2005."
>
>DoReMi's president interrupted me in the middle of a 6 second question.
>He's tied with two others for my a**hole of the show award.
>
>Optibase told me that they would consider my solution to pid remapping when
>I brought them a customer. (Ain't my job, and it won't happen in this
>lifetime.) Ofem something or another is another tied honoree. I did get
>them back; I leaned (twice) on their plasma displays. I hope my handprints
>were there through the show.
>
>t&m
>Every t&m company whose wares I sampled was showing out of compliance (per
>MPEG-2, or ATSC or DVB) transport streams, usually on the "minimum pid >= 48
>issue." Not a single one of them flagged this issue. They would try to go
>into another emission mode to solve the problem, but it's an MPEG-2 issue,
>not an ATSC, DVB or ARIB one.
>
>It would be imprudent (and potentially costly) for me to identify these
>firms: I'm talking to most if not all about licensing my PSI/PSIP t&m
>system. I will say that I did not look to see f the Videotek monitors had
>this issue, nor did I visit the Wegener booth. I did talk to the "usual
>suspects" and found this is a widespread problem.
>
>So;
>
>If the encoders enable you to send out-of-compliance transport streams, and
>the test and measurement gear doesn't flag out of complaince elementary
>streams and program map table instances, how can one blame broadcasters --
>many, if not most are now in compliance with the minimum pid issue often
>through kludges (program_number 1 on pid 48) -- for not detecting the
>problem.
>
>John Willkie
>
>
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