[time-nuts] US New Year countdown - accurate?

[Leigh L. Klotz, Jr WA5ZNU]

I got a demo of a national network quality (and price) digital TV 
encoder from a ham friend in the industry.
It took about 6 seconds delay itself to encode images.  The compression 
has a lot of state and multiple heuristic systems as well (face 
trackers, for example).

Leigh/WA5ZNU

On 01/01/2012 09:09 PM, David I. Emery wrote:
> On Sun, Jan 01, 2012 at 05:54:46PM -0800, J. Forster wrote:
>> To me the ball drop/fireworks was different from the on-screen time on FOX
>> by a few secnds.
> 	I was watching the media pool HD satellite feed on AMC-1 and
> through a broadcast grade IRD (ex PBS Bitlink ) it appeared to be about
> 2 seconds slow relative to  my house NTP timing.   This would about
> exactly match what I would expect for uplink encoder, satellite path,
> and decoder delays.
>
> 	I would expect a TV station using that feed might add anywhere
> from 1-6 seconds to the delay in their internal processing to OTA... and
> a digital cable system might add further delay to that (couple of more
> seconds at least).
>
> 	Real time TV these days is only RELATIVELY real time.
>
>