On Mon, Jan 02, 2012 at 11:57:55AM -0500, [email protected] wrote:
> FYI... NBC advances their video feed, so that it arrives out of the
> station receiver on time.
Several nets do this - of course useless when real time events
are being televised... as the delays are still there, all this means
is the schedule time base (station breaks, commercial slots etc) is
on real time at some point in the chain, doesn't of course make the
ball drop on time out of the IRD... unless they drop it early.
> Another FYI... NBC video delivered over Dish Network are delayed
> 14 -15 seconds... all that processing between the TV station
> Dish/DirecTV receive site and the consumer!!
Much of the delay here is due to absolutely maxing out the
quality per unit bandwidth of the oversubcribed lower than ideal bit
rate video... they way they get so much stuff on those transponders
is very very carefully optimized variable bit rate video, which of
course works best with really deep buffers to look ahead for scene
changes and motion and optimally up the bit rate for just those.
--
Dave Emery N1PRE/AE, [email protected] DIE Consulting, Weston, Mass
02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."
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