DVI
The acronym stands to Digital Visual Interface, DVI is an image screen interface. It was designed to become an international standard used for
the transmission of videos in digital format to displays in resolutions of up
to 2560 and 1600 pixels. The most common
devices that use the DVI connection include monitors for computers as well as projection devices. DVI is also compatible on some televisions however HDMI is more widespread since only a few DVI cables are
capable of transmitting audio signals. This connector (shown below) could be identified by one of
three names, based on the type of signal it is able to support: DVI-A (analog only), DVI-D (digital only) as well as DVI-I (both digital and analog).
Cable
The maximum length that is recommended
for the DVI cable isn't included in the specifications because it is dependent
on the pixel clock's frequency. Most displays that have a maximum cables that is 4.5 meters
(15 feet) are able to display resolutions that can be as high as 1920 1200
pixels.
The resolution of a monitor with the longest length of
cable at 15 meters (49 feet) could be 1280 x 1024 or less. To get the longest length,
it's suggested to make use of the DVI booster (a signal repeater that could
utilize an external power source) to reduce the signal quality.
Connector
The DVI connector in the device comes with three
different names, based upon the type of signal that it transmits:
- DVI-I (integrated
connects analog and digital in the same connector. Digital can be a dual
or single link)
- DVI-D (digital only,
single link, or dual link)
- DVI-A (Analog only)
The majority of DVI connectors (except DVI-A) include
pins that are able to transmit digital signal signals. There are two types of DVI
connectors that are single link or double link. Single-link DVI makes use of one transmitter with 165 MHz
and supports resolutions as high as 1600 x 1200 in 60-Hz.
Dual-link DVI includes six pins in the middle of the
connector to serve as the second transmitter. This enhances bandwidth and allows
resolutions as high as 2560 x 1600 pixels at 60 Hz. Connectors with these
additional pins are commonly referred to as DVI-DL (dual link).
Dual link is not to be confused with dual display (also
called dual head) This is a setup that is often used with one computer that is
connected to two monitors. DMS-59 is designed for the use of two separate DVI
connections.
In the same way as digital, some DVI connectors also have
pins to transfer analog signals. They are utilized to connect the analog
display. These pins
for analog are four pins around the flat blade of the DVI connector, either
DVI-I or DVI A.
For instance for example, an example is that a VGA
monitor could connect to an audio source using DVI-I via an adapter that is
passive. Since these
analog connectors are connected to VGA signaling the adapters are easy to make
and cost-effective offering a low-cost solution to support VGA for DVI.
The pins with flat, long lengths that connect to the DVI
connector are larger than the pins on the DVI connector, which means that even
if you remove those four pins that are analog you are unable to connect the
male connector of the DVI-I to the female head of the DVI-D. But, you can connect the
male connector of the DVI-D to the female connector on the DVI-I male connector.
DVI is the only reputable video standard that
incorporates digital and analog transmissions in the same connection. The competing standards
are all digital standards. They are based on the low voltage differential
signaling (LVDS) that is known by its exclusive name FPD-Link (flat-panel
display) and FLATLINK as well as its successors which are LVDS Display
Interface (LDI) and OpenID.
Certain DVD players HDTV televisions as well as video
projectors feature DVI connectors that utilize high-bandwidth Digital Content Protection (HDCP) protocols to send encrypted
signals to ensure copy protection. The computer is able to be connected to an HDTV via DVI
however, the graphics card needs to be compatible with HDCP to play the content
that is protected by digital right management (DRM).
DVI as well
VGA?
If the monitor you are using as well as GPU can work with both DVI as well as VGA We suggest using an DVI cable. If you use DVI (digital)
it is possible to ensure that the image quality will at least the same as VGA
(analog) and maybe even higher.
Does DVI require drivers or software?
No. If your device supports DVI there is no other applications and drivers are required to be installed. But, remember that
computers video card will require drivers and is among the
most up-to-date hardware devices on your computer.
The pressure is on to turn displays into digital, no matter if they're older CRTs (Cathode Ray Tubes) or LCDs (Liquid Crystal Displays) --because digital monitors offer high-quality images and more bandwidth for transfer.
Three primary kinds of DVI's
There are three primary kinds of interfaces for digital videos: P&D, DFP, and DVI. P&D (Plug & Display, also called EVC) is the first of these technologies, can support both analogue and digital RGB connections. It is currently mostly used on projectors. DFP ( Digital Flat Panel port) was the very first connector that was digital-only on display and graphics cards. it's now being removed from the market.
There
are a variety of connectors available: DVI-D the DVI-I connector, DVI-A, DVI-I
as well as EVC.
- DVI-D is a solely
digital connector that connects the digital display source as well as
monitors. DVI-D does away with
analog conversion and enhances display. It is possible to use it for both connections that are
DVI-D.
- The DVI-A (analog) is
utilized to transfer the DVI signal from an electronic device into another
analog VGA device, like an LCD. If both or one connected to your system are DVI-A make
use of this cable. If one of your connections
can be described as DVI while the second VGA HD15, you need an adapter or
cable with both connectors.
- DVI-I (integrated)
allows both analog and digital RGB connections. It is capable of transmitting either
digital-to-digital signal or an analog-to-analog signal. It is utilized by a few manufacturers in their
products, instead of separate digital and analog connectors. In the event that both are DVI-I you can choose every
DVI cable, however, it is suggested to use a DVI-I.
- DFP (Digital Flat
Panel) was an early connector with a digital interface that was utilized
on a few displays.
- EVC (also called
P&D which stands for the acronym Plug & Display) is an older
connector, which handles both analog and digital connections.
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