Digital Visual Interface
(DVI) is a digital display interface that
is introduced by the Digital Display Working
Group (DDWG), comprised of companies such
as Intel, IBM and Silicon. It is a digital
video standard that is designed to connect
the PC to the flat-panel display. The benefit
is that it uses digital technology to transfer
video information; the drawback is that
it cannot transfer multi-channel signals.
With the maturity of the digital home concept,
the DVI specification has migrated from
the PC to various consumer electronic products,
for example, DVD players, DVD recorders,
digital settop boxes, D-VHS playeres and
audio/video receivers. Today it has become
the mainstream ditital video specification.
Even though the new generation High Definition
Multimedia Interface (HDMI) is developed
based on the DVI specifications; however,
its influence to the traditional PC system
market is minimal, and instead, is primarily
used by the HDTV stereo, entertainment,
and AV equipment market.
In
terms of DVI usage, DVI Cable connector
consists of three different specifications:
DVI-Analog (DVI-A), which is hardly seen
on the market, DVI-Digital (DVI-D), and
DVI-Integrated (DVI-I). DVI-A and DVI-D
each support analog and digital display
equipment. DVI-D and DVI-I simultaneously
support both digital and analog displays.
This complex phenomenon is due to the demand
of switching between analog and digital
signals.
By using the connector, users can change
the VGA D-SUB interface that is traditionally
found on the PC to DVI, or install the DVI
video interface card in order to use the
DVI display. Consumers should take note
whether the signal from the connector is
DVI-A or DVI-D, because these two cable
specifications are not compatible. In order
to solve this problem, it is recommended
that consumers use DVD-I cable to ensure
that the display or related equipment operates
normally.
The
most common problem for consumers using
DVI cable is the length of the cable. Even
though the DVI standard specification does
not clearly indicate the restrictions of
the cable length, however, the length does
not normally surpass 5 meters (16 yards).
When the cable length is too long, the images
appear blurry or unstable. Currently, many
of the cables available on the market claim
to use the best materials, for example,
fiber optics, with better cable structure
to produce 40 to 100 meter-long DVI cables.
However, the price is higher due to the
longer length of the cable, and the average
PC user usually finds that the 1.5 meter
length is enough for its use in his/her
home entertainment AV equipment.
To fulfill the DVI market demands, ATEN
has launched a series of DVI products: VS-261
/ VS-461(2 port / 4 port DVI Video &
Audio Switch), VS-164 (4 Port Video Splitter),
CS-1262
(2 port PS/2 DVI KVM switch), and CS-1262
/CS-1764
(2 / 4 port USB DVI KVMP switch). The ATEN
DVI KVMP Switch is a DVI-I product that
supports DVI-A and DVI-D. It also supports
DDC2B simulation technology, allowing the
user to easily and accurately switch between
different PCs, without losing video signals
or needing to restart the computer. The
ATEN DVI KVMP Switch also can prevent the
increase in electricity flow that causes
short circuiting of the PC or the display.
In addition, the CS-1262
/CS-1764
is equipped with a proprietary ATEN cable
and uses a special material that integrates
three different type of specifications,
USB, DVI and audio into one cable, thus
efficiently saving desk space and simplifying
the connection process. The user also does
not need to change his or her keyboard or
mouse as the CS-1262
/CS-1764
are PS/2 and USB compatible, respectively.
Established in 1979, ATEN International
CO. Ltd, is a leading designer, manufacturer,
and distributor of cutting edge connectivity
solutions for the IT industry and its computer
users. Dedicated to the mission of "Contributing
Knowledge-Creating the Future," ATEN
provides customers with the most efficient,
reliable, and user-friendly connectivity
products to be found anywhere in the market.
As competition within the connectivity market
expands to meet the growing demand of businesses
wanting to upgrade their PC and server management
methods, ATEN continues to keep ahead. In
addition to KVM switches, ATEN provides
a diversified line-up of hundreds of data
communication products, such as switch boxes,
video splitters, interface converters, networking
products, USB HUB and other connectivity
products.
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