Re: New Zealand connection, was Fw: Re: [libreoffice-users] now can Purchase a NA-DVD

webmaster-Kracked_P_P wrote:
> On 07/24/2012 09:43 PM, Brian Barker wrote:
> > At 09:16 24/07/2012 -0400, Tim Lungstrom wrote:
> > > Also the "lag time" for satellite can be up to 15 seconds from 
> > > ground station through a satellite to the ground station.
> >
> > Oh dear: the speed of light must have decreased by a factor of 63 
> > since I was at school!  Has someone told the scientific community?
> >
> > (The delay on the double journey to and from a geostationary 
> > satellite is about a quarter of a second.)
> >
> > Brian Barker
> The lag time is due to the equipment, not the "travel time".
>
> I have both standard and digital cable boxes in my place.  If I have 
> both TVs on the same channel, the digital TV has a 2 second lag for 
> audio and video than the non-digital TV's box.  That is do to the time 
> it takes to convert the TV channel to the digital system and then the 
> conversion back to the coax cable going into the digital TV's coax 
> input.  Just in that simple case, there is a lag due to the equipment 
> involved.
>
> As for the time lag I gave you, that is the lag time given in my 
> course in telecommunication and communication networking.  The problem 
> is the equipment's lag time doing the processing of the signal to be 
> transmitted and then the process of converting the signal back to the 
> original format.

If equipment is imposing such a significant delay, then there's 
something seriously wrong.  As for the difference in TV, I doubt you're 
seeing much analog to digital conversion.  These days, the source is 
usually digital and has to be converted to analog for analog broadcast.  
I don't know how that course arrived at such a figure, as I have 
certainly never heard of it.  If it was real, a lot of common services 
wouldn't work.  For example, when trans-Atlantic calls first started 
going via satellite, the satellite channels were paired with cable 
channels, so that only one direction would go via satellite, so as to 
keep the echo delay to manageable levels (< 1/3 sec) .  Otherwise, the 
echo would interfere with speech.



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