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New Year's countdown TV/computer synchronicity

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  New Year's countdown TV/computer synchronicity dennism3@dennism3.invalid (Dennis M) - 2012-01-01 18:10 -0600
    Re: New Year's countdown TV/computer synchronicity Remysun <remysun2000@yahoo.com> - 2012-01-01 16:50 -0800
      Re: New Year's countdown TV/computer synchronicity Professor Bubba <bubba@nowhere.edu.invalid> - 2012-01-01 23:46 -0500
    Re: New Year's countdown TV/computer synchronicity Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-03 20:54 +0000

#9847 — New Year's countdown TV/computer synchronicity

A couple of days before New Year's I put a digital javascript countdown on
my website just for the heck of it, you just insert the date you want (Jan
1 2012 0:00:01 in this case) in the script and digital numbers that come
with the script will count down to that time.

But I noticed the javascript countdown -- which uses my computer's clock of
course which is periodically adjusted by the Apple Americas
(time.apple.com) server -- was about 10-12 seconds faster than all the
countdowns that were going on live on TV. Is this because of the lag time
of the signal on TV?

Not a huge issue but I was just wondering if anybody had an explanation.

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#9848

On Jan 1, 7:10 pm, denni...@dennism3.invalid (Dennis M) wrote:
> A couple of days before New Year's I put a digital javascript countdown on
> my website just for the heck of it, you just insert the date you want (Jan
> 1 2012 0:00:01 in this case) in the script and digital numbers that come
> with the script will count down to that time.
>
> But I noticed the javascript countdown -- which uses my computer's clock of
> course which is periodically adjusted by the Apple Americas
> (time.apple.com) server -- was about 10-12 seconds faster than all the
> countdowns that were going on live on TV. Is this because of the lag time
> of the signal on TV?
>
> Not a huge issue but I was just wondering if anybody had an explanation.

Yes. I once watched a game at Michigan Stadium with a portable
television, and there was quite a lag from what I saw on the field.
That was analog, and I know from the transitional days that the
digital signal was even further behind from the analog signal.

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#9849

In article
<a2353a63-5305-410f-bd72-0647fad2bbb1@b32g2000yqn.googlegroups.com>,
Remysun <remysun2000@yahoo.com> wrote:

> On Jan 1, 7:10 pm, denni...@dennism3.invalid (Dennis M) wrote:
> > A couple of days before New Year's I put a digital javascript countdown on
> > my website just for the heck of it, you just insert the date you want (Jan
> > 1 2012 0:00:01 in this case) in the script and digital numbers that come
> > with the script will count down to that time.
> >
> > But I noticed the javascript countdown -- which uses my computer's clock of
> > course which is periodically adjusted by the Apple Americas
> > (time.apple.com) server -- was about 10-12 seconds faster than all the
> > countdowns that were going on live on TV. Is this because of the lag time
> > of the signal on TV?
> >
> > Not a huge issue but I was just wondering if anybody had an explanation.
> 
> Yes. I once watched a game at Michigan Stadium with a portable
> television, and there was quite a lag from what I saw on the field.
> That was analog, and I know from the transitional days that the
> digital signal was even further behind from the analog signal.


Macs call into the time server during reboot.  If you haven't rebooted
in a while, that might account for some of the discrepancy.

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#9899

In comp.lang.javascript message <dennism3-ya02408000R0101121810300001@ne
ws.datemas.de>, Sun, 1 Jan 2012 18:10:30, Dennis M
<dennism3@dennism3.invalid> posted:

>A couple of days before New Year's I put a digital javascript countdown on
>my website just for the heck of it, you just insert the date you want (Jan
>1 2012 0:00:01 in this case) in the script and digital numbers that come
>with the script will count down to that time.

<http://www.merlyn.demon.co.uk/js-dates2.htm>  has a selection of
countdowns.

-- 
 (c) John Stockton, nr London, UK.    ?@merlyn.demon.co.uk     Turnpike v6.05.
 Website  <http://www.merlyn.demon.co.uk/> - w. FAQish topics, links, acronyms
 PAS EXE etc. : <http://www.merlyn.demon.co.uk/programs/> - see in 00index.htm
 Dates - miscdate.htm estrdate.htm js-dates.htm pas-time.htm critdate.htm etc.

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