[mythtv] ATSC question

Devin Heitmueller devin.heitmueller at gmail.com
Wed Feb 24 17:21:51 UTC 2010

On Wed, Feb 24, 2010 at 12:06 PM, Dan Wilga
<mythtv-dev2 at dwilga-linux1.amherst.edu> wrote:
> Perhaps I misread something, but I thought one of the previous posts implied
> that there is a change in the data when a program actually starts, for
> V-CHIP purposes. I assume that the broadcasters don't automatically say,
> "just because it's 7:00 PM on Sunday I'm going to send out the V-CHIP data
> for 60 Minutes," whether it's on or not. I assume they only send the data
> when the program actually starts. Otherwise, V-CHIP wouldn't really be doing
> what's it's supposed to do.

It's been a few months since I've looked at the spec, but if I recall,
the RRT data is associated with data in the program guide, which is
expected to be used in conjunction with the sychronized realtime clock
being sent down the wire (another mandatory part of PSIP).  I believe
the receiver is expected to correlate the information.

I'd have to double check A/63c to confirm that's how it works, but
that's how I remember it.


Devin J. Heitmueller
AIM: devinheitmueller

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