Switching equipment AV

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Switching equipment

We represent switching equipment from AV Production

AV Production

Switching equipment

Types of switching equipment

Amplifiers - distributors

Amplifier-distributors (splitters) amplify and distribute (split) a signal to multiple channels. They differ in formats and types of signals transmitted

Switching channels sometimes stretch for hundreds of meters and on their way to their "destination" the signals must often be "multiplied" and transmitted to display devices (video projectors, video panels or video walls). Such technological solutions are used, for example, in electronic signage systems (Digital Signage).

Switches, Matrix Switches

Switches

Audio-video switchers are a group of devices for signal distribution and direction. They can be single-channel devices as well as signal "multipliers". Sometimes switchers are called selectors (from the English "select" - to choose) due to the fact that they allow you to choose which signal from which input to apply to which output. Outputs can be many or one. Typically, the standard situation for the use of the switch is as follows: one display device (video projector, video wall, etc.) and many sources of the same type of output signal.
Switches do not perform signal conversion. Each device is designed for a specific type of signal (S-Video, DVI, HDMI, VGA, etc.).
Usually the number of inputs and outputs on standard switches is small. If there is a need to combine a large number of sources and display media, a matrix switch is used. The number of input-output pairs in it usually exceeds a dozen.
Switches are controlled both manually and via the local network.

Matrix Switches

Matrix Switches (video matrices) are devices for randomly connecting multiple signal sources to different display devices. The number of inputs-outputs can be up to several dozen, and the number of combinations of switched devices - several hundred.
Since a matrix switch has many inputs and outputs on opposite sides, for clarity the visual representation of the input-output pairs connection is represented by a table with vertical and horizontal markings. The involved pair is marked by the intersection of a row and a column of the table. Such tables are called "matrices". This is why the device got its name "matrix switch".
Matrix switches differ in the way they control signal switching. On some you can find buttons to switch channels, on others there is nothing but inputs and outputs: all control is via a web interface through a computer. The second option is more convenient because it allows the operator to be far away from the device.
Matrix switchers are divided into many types according to the signal they process (DVI, HDMI, SD and HD-SDI, YC (S-Video), etc.).

Control systems

With the help of control controllers and the control server you can remotely control different types of equipment (video walls, video panels, cameras, multimedia projectors, etc.).
The core of the control system is the processor, which receives commands from the operator and forwards them to the devices, and also contains various scenes of the equipment operation. The processor is a programmable device. As a rule, all control systems are based on IP-technologies

Format converters and processors

Format converters (or converters) convert one type of audio/video signal to another. However, unlike scalers, format converters are usually single-channel devices. Although their functions are the same, converters perform the conversion in a much higher quality.
Converters are distinguished according to the formats of images and video streams.
Format converters are also used in the case of embedding individual devices in a switching network where a different type of signal is used. For example, it is often necessary to bring a computer with a VGA output into a system that is based on digital data transmission.

Quite often format converters are used in TV studios, where you need a particularly high-quality signal conversion without loss of quality.

Scalers and scan converters

Scalers are designed to convert one signal to another. In a situation where you need to promptly output an image from various devices, they are just necessary. Therefore, this device, as a rule, has many inputs and one output (the required signal).
Usually, scalers operate in tandem with the display device for which they scale the signal. In this case, the resolution (size of the "picture" at the output) is selected in accordance with the resolution of the matrix of the display device.
The devices are controlled, as in most cases, from the front panel or by commands via the RS-232 interface.

Interface extenders and repeaters

In order to distinguish the signal from possible noise or interference, interface extenders (extender or linetransmitter) are used. These devices ensure that the signal is transmitted over the required range with a low level of interference.

Interface extenders are paired signal amplifiers and converters. Typically, the signal is converted from analog to digital and can then be transmitted much farther with twisted pair than with any other analog cable. The task of an interface extender is to amplify the signal and transmit it over twisted pair at the initial point, and then receive and transmit it again over the original interface cable. For example: HDMI - Twisted Pair - HDMI.

Such devices are quite widely used in various types of installations, since the length of traces at modern facilities is often up to several hundred meters. Interface extenders successfully cope with these values. For example, composite signal as well as HDMI can be transmitted up to 100 meters without any visible loss of quality. Of course, depending on the type of signal, the length of possible extension varies, but, at the same time, the interface's native cable can in no way compare with even the smallest achievements of interface extenders.

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