 |
High Definition Presentation
Systems
Overview
High Def is now well established
in television production and broadcasting but for the world of A/V
presentation systems, it is still very new and developing rapidly.
For A/V systems, even the term "high definition" is a slippery
one.
If your firm or institution is considering HD for display,
projection or videoconferencing, it's crucial to have a guide who will make
sure that the system you choose will meet your performance requirements,
your budget and will be friendly to the staff who operate it. That's where
the Videoscope A/V System Consultants and Engineering Team can be a vital
asset.
To
meet our Consultants, click here.
There are some common misconceptions in the consumer high def
market. It's wise to be aware of them.
Myth #1: If it's wide screen, it's High
Definition
Not necessarily so. High def is
always wide screen but wide screen is not always high def.
"Wide Screen" can refer to
the high definition screen ratio: 16:9, (16 units wide by 9 units high),
or any shape where the ratio is substantially wider than the original 4:3
television shape.
But a standard definition image can be shot in wide screen format or
reconfigured to look wide screen as well.
If, for example you purchase a "480P" display, you get a 16:9 wide
screen image, but it is displaying standard definition television.
Myth #2: Anything that shows on your HD
TV is High Definition
It may fill the screen, but it's not necessarily high def.
There is a difference between resolution and signal format. An HD TV
will display any signal in its 16:9 format. But if that signal is
standard definition, the TV cannot change the resolution to high definition.
It will either stretch the signal wider to fit, or crop off the top and
bottom. Material shot standard def wide screen will fit properly, but none
of these standard def signals will have the quality, the crispness, detail
and clarity of a high definition signal.
What
makes it true High Definition?
To be true high definition, the
image has to be shot HD, transmitted HD and displayed HD.
As more of us get HD TV sets and our eyes tune in to higher quality images,
we'll start to notice the difference between shows that have been bumped up
to high definition, and those actually shot in HD.
HD Corporate Applications
High Definition LCD and plasma displays are gaining ground as digital
signage advertising. Current computers and projectors can handle high
definition signals, and forward thinking corporations are starting to
install HD boardroom and Videoconferencing systems. In future articles we'll look at
options, including the
various HD flavors even within "true" high definition, and at the
issues to be considered for corporate applications.
|
|
