08 Mar 2008 12:36:14 | Dale Lawrence
Satellite TV is Making the Cable Companies Run Scared
Satellite TV holds a great advantage over the cable TV
companies. Not only is the picture and sound quality superior,
but there’s more choice in what to watch. If you said to
yourself ‘there’s nothing on TV’, switch to satellite. The
differences couldn’t be more obvious.
Cable quality vs. Satellite quality
With the limited bandwidth that cable offers, it’s no wonder the
quality is poor. First, the cable wire comes from a hub
transmission system somewhere near your home. At source, the
signal is passable, but by the time it runs through your
community, splitting to each house, the signal has degraded. As
the cable is RF (radio frequency) based, it has converted from
an audio/video signal (at source) to RF and then needs to
re-convert back into audio/video for your television. Along the
way, anything broadcasting through the air has tried to get into
the cable line and will appear as noise on your TV screen.
Unfortunately, we are our worst enemy as well. Look at your
cables and splitters inside your house. Poor quality RG6 or RF
cable can cause great loss of signal too. Turn on your TV and
have someone bend your cable in half and watch for ghosting on
your picture. If it is ghosting, you have unshielded cables!
Replace them with something better like Monster Cable. RF cable
has a tough time producing stereo sound too, so don’t expect
great audio. Another culprit of poor cable quality is the cable
splitter. Most splitters have just a positive and negative wire
inside (it’s a noise box). Throw it out and again replace with a
good splitter (Monster Cable makes quality ones).
Satellite signals stay digital until the receiver. That means
better picture and audio. The picture can be 2-3 times better
resolution from your cable picture. The sound from the satellite
receiver is true stereo and can be Dolby Digital surround
depending on the program you are watching. Plus there are many
more channels to choose from.
By the way, if you have a digital box from the cable company,
you have only a handful of digital channels, the rest are the
same if you remove the cable box.
Satellite companies like Direct TV (or DirecTV) and Dish
Network, provide national satellite service with hundreds of
digital stations. The picture is clear and crisp, especially if
you spring for a high definition receiver to match your HD ready
TV. While most cable signals are below 150 lines of interlaced
resolution, standard satellite can approach DVD quality (480i)
and HD content will be sent at either 1080i or 720p
(progressive). A regular 27” TV has the capability of no more
than 500i while a HD television can produce the full range.
What are interlaced and progressive signals? Interlaced
broadcast was developed from the old NTSC format where the
designers in the 1920’s and 30’s couldn’t get the TV to scan
every line from the top of the screen to the bottom fast enough.
They needed to cheat by having the TV scan all the odd lines; 1,
3, 5 etc. then go back and scan the even lines; 2, 4, 6 etc. The
result is thick black lines running horizontally across your
screen and only half the picture appearing. These flickering
lines prevented you from sitting close to the television without
getting eye strain. As the TVs got bigger, you sat farther away.
The new HD televisions scan all the lines progressively and
refresh the screen much quicker. It is like looking through your
front window with horizontal blinds. Turn the rod so the blinds
are half open. The street outside is now half covered like
interlaced pictures and you only see half the picture at one
time. Now pull the cord to fully open the blinds. You now see
the entire window unobstructed or like a progressive signal.
Satellite TV and
Radio :: Your #1 Source for Satellite Television and Satellite
Radio.
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