TELECOM Digest OnLine - Sorted: Re: How is Weather Channel Data Delivered to Cable Head-End

Re: How is Weather Channel Data Delivered to Cable Head-End

Garrett Wollman (wollman@khavrinen.csail.mit.edu)
Mon, 2 May 2005 23:43:04 UTC

In article <telecom24.193.7@telecom-digest.org>, Dan Griffin
<dgriffin@webaccess.net> wrote:

> Does anyone know how "The Weather Channel" distributes the regional
> forecast information (as seen during the "local on the 8's" portion)
> to the local cable companies. Is it data in the vertical interval of
> the TV signal, or do they use internet connections (broadband,
> dial-up), or some other communication channel?

None of the above. It's one-way IP over digital satellite (using
multicast IIRC). They have some sort of a backchannel, but I don't
remember what it was. The one box also handles all of the video
(de-)compression. (It's a PC running FreeBSD, for those to whom this
is meaningful, with specialized satellite and video hardware.)

-- 
Garrett A. Wollman    | As the Constitution endures, persons in every
wollman@csail.mit.edu | generation can invoke its principles in their own
Opinions not those    | search for greater freedom.
of MIT or CSAIL.      | - A. Kennedy, Lawrence v. Texas, 539 U.S. 558 (2003)

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