US New Year countdown - accurate?
Part of that is the fact that it's beamed back to Bernie's Bunker at
Silverstone, before being fed on to the broadcasters, and then onto
the actual transmitting company so you have that extra delay to add in
as well.
Yes, I'd forgotten about that!
Indeed, it's fun watching with the timing and scoring app on the laptop,
with the commentators wondering (or thinking) such and such a driver is
going to get pole or improve his time, and I already know he hasn't!
Iain
I get exactly the same fun with the laptop feed or the iPad application!
Cheers,
David GM8ARV
SatSignal software - quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
A minor correction, I believe Bernie's Bunker is based at Biggin Hill, not
Silverstone.
Rob Kimberley
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Iain
Sent: 02 January 2012 17:14
To: time-nuts@febo.com
Subject: Re: [time-nuts] US New Year countdown - accurate?
On 02/01/12 08:14, David J Taylor wrote:
Another example: Watching Formula 1 races (where the timing at the
circuit is usually pretty accurate judging by the events I've
attended) over terrestrial TV here in the UK usually results in an
offset of 5-7 seconds. The radio feed is usually much less delayed.
Yes, there are satellite links, but also the digital TV compression
and multiplexing etc. accounts for a significant delay.
Part of that is the fact that it's beamed back to Bernie's Bunker at
Silverstone, before being fed on to the broadcasters, and then onto the
actual transmitting company so you have that extra delay to add in as well.
Indeed, it's fun watching with the timing and scoring app on the laptop,
with the commentators wondering (or thinking) such and such a driver is
going to get pole or improve his time, and I already know he hasn't!
Iain
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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.
It was accurate. I was right there using Android UTC time application.
Also about the leap-second on July 1st, this will allow revealing whether
Samsung just did a 15-second offset hack to get around Google bug 5485
(that makes non-Samsung Android phones currently 15 seconds fast), or if
really they tweaked firmware to derive utc-disciplined data rather than
gps.
Cheers,
Chris
On Sun, Jan 1, 2012 at 20:46, Jim Palfreyman jim77742@gmail.com wrote:
Hi folks,
Ignoring the travesty of a lyric change on John Lennon's classic song, did
anyone check to see if the clock countdown in Times Square was actually
accurate?
In times gone past countdowns have been notoriously off (worst I saw was a
tv personality using his own watch and it was 25 seconds out).
Oh and why we're at it here is my worst time-nut story...
Pulled up in a "Loading Zone 8-6pm" at 18:00:10. Got out, came back 4
minutes later to find a parking officer giving me a ticket.
Me: "Look at the time (showing my watch) - it's 6:04"
Him: "Not by my watch" (which said 5:59 at that point).
Me (massive sarcasm voice): "So. Let me get this straight. Despite
worldwide time standards keeping clocks accurate to billionths of a second
and costing millions of dollars, all that is now been binned and we now
keep world official time by your watch. Is that right?".
Him: "Bu..."
Me (interrupting and pulling out mobile): "Let's listen to the national
time standard shall we?" (I dial and put on speaker - his watch is a good
solid 5 minutes slow).
Him: Walks off screwing up ticket.
The sheer arrogance of the "Not by my watch" comment irks me to this day.
Jim
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