[opendtv] Re: PSIP, cable guide info, and Zap2It

  • From: "johnwillkie" <johnwillkie@xxxxxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Mon, 9 Jul 2007 11:22:26 -0700

John;

I'd be interested in knowing what provision is in A/65C (and not in -b or
the original) that you feel limits the ability of one station to carry the
PSIP information for other stations.

Maybe I missed a new word here or there in the latest version, but I know of
no such limitation in PSIP.

I blanch at the idea of "use your pc to find out what's on TV" without
addressing the data parallax issue.

Also, I should point out that A/65c isn't required by the FCC: the 20030318
version of A/65 is.

John Willkie

-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de John Shutt
Enviado el: Monday, July 09, 2007 9:50 AM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: PSIP, cable guide info, and Zap2It

The problem with using PSIP is that you either need a dual tuner card/stb or

must put up with losing your picture every so often as the ATSC tuner scans 
all the available OTA channels for EPG information.  Tuners could do the 
channel scanning/guide harvesting while the STB is "off", but if the box is 
never turned "off" it would never have the opportunity to refresh the 
"master" EPG.  Further, only 12 hours of EPG data are mandated by A/65, so a

2 AM channel scan may not cover the flowing day's prime time line up.

Of course, that does not address those cases where antenna orientation is 
critical to reception, and any sort of market wide EPG scan would fail for 
certain channels.  Internet based guides are all inclusive, can be read 
without interrupting the viewing or recording of an ATSC channel, and 
provides uniform content from station to station in a market.

At one point very early in the ATSC process, it was suggested that PBS 
stations (presumably being 'neutral' in the ratings wars) would carry 
program information for all OTA stations in the market, easing the task of 
OTA viewers keeping a current and complete program guide.  Unfortunately 
that was never implemented, and I'm not sure that is even possible today 
given the way A/65C is worded.

John

----- Original Message ----- 
From: "Tom Barry" <trbarry@xxxxxxxxxxx>


>I think my MyHD card does use PSIP info, not sure about the F3Q.  I'm never

>sure where the info comes from because I'm using the CW EPG program and I 
>think that blends guide info with whatever the MyHD program gets from 
>whatever sources.  And most of my timer recording are on QAM cable so I 
>don't think PSIP applies there.
>
> On my Fusion card I can schedule with TitanTv but mostly use it for fixed 
> repeating timer recordings with no guide info.
>
> Is PSIP not copyrighted?  That is, if I take it off the air can I legally 
> share it with others?
>
> - Tom


 
 
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