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

David davidwhess at gmail.com
Mon Jan 2 05:37:41 UTC 2012


On Mon, 02 Jan 2012 06:20:36 +0100, Magnus Danielson
<magnus at rubidium.dyndns.org> wrote:

>On 01/02/2012 06:09 AM, 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.
>
>When doing interviews on live TV across the atlantic, using uncompressed 
>video and audio have been used to avoid the anoying delays.
>
>But the highly technical world now has more delay than we used to. 
>Progress... :P

Even 10 years ago when watching live interviews from space, the TV
coverage was significantly delayed compared to the NASA audio feed
which was broadcast over the local amateur repeaters.




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