Digital Video Interface
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How to Choose the Digital Video Interface

If you consider the rapid pace that technology is changing these days, it understandable that antiquated analogue systems are being outmoded by new and improved digital counterparts. In order for your system to keep up with everything it is important to choose the right digital video interface to go with it. DVI is basically a modern adapter that allows a video stream of data to be displayed on a monitor, LCD screen or even sent through to a recording box for security cameras.

Most outputs from security systems still run on the old analogue systems and the recording systems have all been converted to digital because they are costs effective and save on storage when it comes to all the recordings. The type of DVI connector you have use is dependent on the type of system you are using and whether or not you are using a purely digital system, and combined system or a purely analogue that needs to have the signals converted into digital.

There are Different Types of DVI Connectors

DVI-D is the first one for you to look at, and it is a purely digital solution that only operates on digital platforms. In other words, you will only be able to transmit a data stream that comes from a digital output directly into a digital input system, regardless of whether it is to a monitor or a recording device. This particular system allows for clearer images and faster data transmission because the data itself does not have to be converted in any way.

DVI-A is the analogue version and it is basically designed to transmit a digital signal to an analogue device. You will normally find them plugged into the back of an old graphics for a computer or plugged into the back of a CRT monitor that still uses the tube at the back of the screen. Converting digital signals into analogue causes a loss in data integrity and the images quality starts to deteriorate.

DVI-I is the integrated version that gives you the best of both worlds and actually allows you full compatibility for both digital and analogue systems. They can transmit both digital to digital and analogue-to-analogue signals with no hassle at all. However, it is important for you to note that these systems are not interchangeable and it is important that you use the correct connections for the correct systems or they will not work.

Dual Links and Single Links As Well

In addition to the various connector options you still have to figure out if you need a dual-link or a single-link cable. Essentially all DVI connectors function by using something called TMDS, or transition minimised differential signalling which is sent and received via a transceiver on either end. A single-link cable will only have one of them where as the dual cable obviously has two. The only real difference is the fact that you get better signal faster data throughput on the dual, because there are two of them.

And there you have it, a quick crash course on how to choose the digital video interface for a compatible digital video system.

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