You state that you had a digital cable installed. Is a digital box
connected to all your television sets? In Rhode Island, two services
come into the house simultaneously, one requires a digital decoder box
at each television and the other is a non-HD service that can be fed to
many sets using a splitter. There is considerable delay between the two
that produces the effect that you mention. I assume that the HD requires
the more sophisticated decompression and hence a longer delay.
Bob at PC
-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu
[mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Pete
Lohstreter
Sent: Tuesday, September 23, 2008 8:39 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Digital TV signal delay
Interesting discussion, but I'm not sure it explains an observation I
made
after I had digital cable installed. (FIOS..)
One evening, my wife turned on the TV in the den to the same station I
was
watching in my office (30 feet away...) and there was a noticeable delay
-
over a second- between the two signals. Was one of my decoder boxes
operating at a higher resolution and needing more decoding time?
enquiring minds want to know...
PL
Pete Lohstreter "Happy is he who gets to know
The Hockaday School the reasons for things. "
11600 Welch Rd Virgil (70-19 BCE) Roman poet.
Dallas, TX 75229