Video Switches and Video Matrix Switches Explained
Have you ever wondered how your local gym broadcasts the same 6 channels on the 16 different televisions that are hanging up on the walls? Well, they do this using video switches and video matrix switches. The only difference between the two is the amount of input ports on the device. A video switch is used to take a video signal from one source and display it on multiple outputs. Matrix video switches take it to the next level, they have multiple inputs and multiple outputs. Devices range in capabilities, from simple desktop applications to high input server rooms/data centers. Connectivity on the switches ranges depending on video formats. VGA, DVI, Composite, HDMI, Component, and S-Video are the video signals supported by different video switches.
The typical video switch will have inputs and outputs for video and audio. Depending on the format of the monitors and output device you wish to use you will need multiple audio and video cables. For example, if you have a VGA computer with an image that you want to display on 4 different televisions in a bar you will need a total of 5 different VGA and audio cables. A single cable is run from the computer to the input on the switch, and the other 4 cables are output to the displays. Switching can be done on the actual switch and with an infrared remote. These devices are very easy to install and use!
Video matrix switches work the same exact way, however the amount of input ports on the switch increases as does the amount of cables necessary for connectivity. Matrix Video Switches are also available in a CAT5 format. There are high input, high output matrix switches for long distance video distribution. These work a little bit differently. There is on main transmitter unit where all input devices are connected. CAT5 outputs are on the transmitter device where CAT5/CAT6 cables are run to receiver units at the output displays. These CAT5 AV Matrix Switches have as many as 16 inputs and 16 outputs! This type of device is perfect for digital signage in an environment with many televisions/display outputs. For each output you will need to purchase an additional receiver unit. High density matrix video switches like these also serve as video extenders because the highly reliable CAT5 connections allow for AV transmission up to 1000 feet from the source!
Larger output matrix switches are usually VGA video format with stereo audio and mic connectors. They often times incorporate serial ports as well for servers and RS232 serial devices.
HDMI Video Switches are becoming more useful today with the new video technology that is developing. Since Blu-Rays burst on to the market, more and more managers are using HDMI switches in their video distribution applications.