nanog mailing list archives

OT: how smart cable TV works


From: Jay Ashworth <jra () baylink com>
Date: Thu, 2 Dec 2010 19:26:05 -0500 (EST)

----- Original Message -----
From: "Ryan Finnesey" <ryan.finnesey () HarrierInvestments com>

I have TWC in NYC. I see now I can restart most of the shows I watch.
How is this done?

On digital cable systems, it's because your cable box is now really a
GoogleTV/Rokubox like thing that only looks like a "cable converter".

You tell it to pause, it allocates a channel for you, and -- courtesy of
a Supreme Court decision last year -- turns into a remote node for a massive
DVR in the headend.  Same way they do all the on-demand stuff.

Is it the same MPEG encoding that came out of the station/network's MPEG 
encoder?  Almost certainly not.

Is it the same bitrate?  Hell^no.

Cheers,
-- jra


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