[opendtv] Re: A/53C PID requirements for Jan 1, 2005
- From: Terry Harvey <tjharvey@xxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 23 Dec 2004 15:20:25 -0700
Thanks,
Terry
At 03:53 PM 12/22/2004 -0500, you wrote:
>Minor Correction..
>
>TSID is in the PAT not the PMT...
>
>William
>
>tjharvey@xxxxxxx wrote:
>
> > I made the change at our station about six months ago. I would advise
> using your transport stream monitor and examining closely that the MPEG
> Transport PSI tables are in agreement with the ATSC PSIP tables.
> >
> > After the change (we were following the ATSC A/58 recommendation of
> starting from program 2 (eg PMT 0X20 Video/PCR 0X21 etc) we found that
> about half of our receivers immediately found the new paradigm and the
> others needed to be rescanned and were fine. However, as we discovered in
> the past, if there was any misalignment between MPEG PSI and ATSC PSIP
> MGT then you would have problems.
> >
> > Also, it is important to ensure that other descriptors are correct. We
> had a problem earelier when the TSID in the PMT did not match the TSID in
> the TVCT: in this case some receivers would not display but would
> acknowledge presence of a program!
> >
> > The only real answer is to use you stream analyser and examine closely
> for discrepancies.
> >
> > Terry Harvey
> >
> >>From: Mark Aitken <maitken@xxxxxxxxxx>
> >>Date: 2004/12/22 Wed AM 10:09:43 EST
> >>To: opendtv@xxxxxxxxxxxxx
> >>Subject: [opendtv] Re: A/53C PID requirements for Jan 1, 2005
> >>
> >>I (too) am trying to confirm issues with receivers. What makes it so
> >>difficult is the lack of understanding (even on the part of the
> >>Broadcast vendors) of what is "correct", and what MAY "work".
> >>Ron Economos wrote:
> >>
> >>
> >>>William Smith wrote:
> >>>
> >>>
> >>>
> >>>
> >>>>Ron,
> >>>>1. What model receivers are having trouble?
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>The receivers that stopped working were the
> >>>Toshiba DST-3000, the VOOM stb, the
> >>>USDTV stb, the Hitachi 51S700 integrated
> >>>tuner HDTV and some PC tuner cards.
> >>>
> >>>A few stb's reverted back to the RF channel
> >>>number and showed the MPEG-2 Program
> >>>number as the sub-channel (24-3 and 24-4).
> >>>
> >>>The LG-4200A, Zenith HD-SAT520, RCA DTC-100,
> >>>Sony HD-300 and my own Samsung SIR-T165 had no
> >>>problems at all.
> >>>
> >>>
> >>>
> >>>
> >>>>2. Did the TVCT get updated with the new informaion and a new version
> >>>>number?
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>I' don't work for KGO, but I am the MPEG-2 Transport Stream
> >>>expert at LSI Logic (formerly C-Cube), so I was just trying to
> >>>help out. However, it looks like they got some help from the USDTV
> >>>folks and the problem appears to be solved as of 3 pm Tuesday
> >>>(and they are still using Program numbers 3 and 4). If I find out
> >>>what the actual problem was, I'll post it here. A TVCT mismatch
> >>>seems highly possible.
> >>>
> >>>Ron
> >>>
> >>>
> >>>
> >>>
> >>>>William
> >>>>KET
> >>>>
> >>>>
> >>>>Ron Economos wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>As many of you know, ATSC A/53C has dictated
> >>>>>that all PID assignments (except for PAT) will be
> >>>>>numbered equal to or above 0x0030 after January
> >>>>>1st, 2005.
> >>>>>
> >>>>>At the same time, the "program paradigm" for PID
> >>>>>assignment has been deleted. The "program paradigm"
> >>>>>is in older versions of A/53, and assigns PID numbers with
> >>>>>these formulas (where N equals the MPEG-2 Program
> >>>>>Number).
> >>>>>
> >>>>>PMT = 16*N
> >>>>>PCR = 16*N + 1
> >>>>>Video = 16*N + 1
> >>>>>Audio = 16*N + 4
> >>>>>
> >>>>>One of the local DTV stations here in the SF Bay Area,
> >>>>>KGO-DT, has fulfilled the equal to or above 0x0030 PID
> >>>>>requirement by changing their Program Numbers from 1 and 2
> >>>>>to 3 and 4 and continuing to use the old "program paradigm".
> >>>>>This results in PIDs 0x0030, 0x0031, 0x0034, 0x0040, 0x0041
> >>>>>and 0x0044.
> >>>>>
> >>>>>This has caused some receivers to display a black screen
> >>>>>and no audio when tuned to KGO-DT. No amount of
> >>>>>re-scanning will resurrect these receivers.
> >>>>>
> >>>>>So the question to the group is:
> >>>>>
> >>>>>What is the safest way to satisfy the equal to or above 0x0030
> >>>>>requirement? Since the "program paradigm" has been deleted,
> >>>>>should MPEG-2 Program Numbers now start at 1 (instead
> >>>>>of the previously recommended 2)?
> >>>>>
> >>>>>Thoughts and experience would be appreciated.
> >>>>>
> >>>>>Ron
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>
> >>>
> >>>
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> >>>
> >>>
> >>
> >>--
> >>
> >>Regards,
> >>Mark A. Aitken Director, Advanced Technology
> >>
> >>***********************************
> >>Sinclair Broadcast Group
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>----
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>Technology Division ----------------------
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