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[ Huaqiang Security Network News ] Matrix switcher is used to send multiple video/audio information to multiple audio/video terminals. The matrix switcher receives audio/video signal inputs from a computer, camera, DVD player, etc., and sends its output to different terminals, such as projectors, monitors, and multimedia digital codecs. 
Matrix Switcher Application Knowledge <br> The correct choice of matrix switchers for a particular environment requires consideration of the following:
1. The matrix switcher can send any input to any output or multiple outputs at any time.
2. According to different models, the matrix switcher can send composite video and stereo audio (balanced/unbalanced).
3. The matrix switcher can accommodate multiple signal types, however, a certain signal type of the input can only be sent to the output terminal of the signal type.
In other words, the composite video input can only be sent to the composite video output terminal.
How to use matrix switcher?
Matrix switchers are used in corporate conference rooms, military, control centers, classrooms, restaurants, home theaters, and video conference rooms.
The following uses an example of a matrix switcher for a restaurant. Three audio/video information and one audio-only information are input to the composite video matrix switcher (SB-5548). All inputs will be sent to one or more of the eight displays connected to the matrix switcher and to the audio system.
Hotel customers can watch the video played by the DVD player through two projectors, and the live broadcast through the digital satellite system is also sent to the TV area. The audio system plays music at the same time. Switch the different inputs to different outputs by pressing the button.
Matrix switcher purchase 1) Category selection, broadcast and video conferencing applications, should use broadcast-grade products, monitoring applications can use monitoring products, VGA signals (some people also regard it as video) to use VGA signal matrix.
2) Size selection: In one project, the audio signal and video signal and VGA signal should be regarded as three different media. Audio signals generally have a large number of inputs, such as microphones and CDs, as well as audio from disc players. However, considering that amplifiers and stereos are generally only one set, at most one mixer can be added to the mixer before mixing. It may take several Road signal, so the output of the audio matrix will not be very large, such as 32 × 8 or 64 × 8, but it is not necessary to choose 32 × 32 or 64 × 64, unless it is broadcast and video conferencing transmission, there must be audio for each video Synchronous transfer.
In the design scheme, the number of signal sources is relatively easy to determine. See how many sources, the input quantity of the matrix is ​​fixed, but the number of independent output channels should be considered, which is determined according to the operating mode of the system. Sometimes there may be only a few display devices that have a distribution relationship (which is always consistent with each other, not independent). Then consider occupying an output port and adding an allocator. If these devices are likely to be independent, they are still independent. The output is better.
In many cases, the number of inputs and outputs is large. If a large matrix is ​​used, the cost will be higher (the larger the matrix, the harder it is to do and the higher the cost). Consider whether it can be grouped, for example, when monitoring, you can make the display wall In some display devices, only the signals of a certain area are displayed, and other devices respectively display signals of other specific areas, then the large-scale matrix can be divided into small-scale matrices (for example, dividing 128×64 into 4 sets of 32×16) If there is a possibility that signals need to be transmitted between the zones.
As a part of the transmission system, the matrix switcher can be found in the "Common Problems and Solutions in Engineering". The principle is the same. It is nothing more than several mechanisms. As long as the phenomenon can be distinguished and solved. There should be no major problems with the direction. More specific is the use of small-scale matrix to form a large-scale problem, for example: when using 64 × 32 to form 128 × 32, you can not use two 64 × 32 to form 128 × 64, this is still the concept of group use, and application three The station 64×32 is composed of 128×32, which is the concept of full matrix. Therefore, the difference between group use and full matrix should be distinguished when combined. (The whole matrix means that each output can be selected in all inputs and independent of each other. ).
3) There are many manufacturers who choose the production matrix, and the nominal indicators are different. Since such equipment is not a laboratory prototype, but an engineering application product, the applicability and reliability issues in the project are very important. The situation of the project site is different. In the process of product maturity, it needs to undergo continuous engineering inspection. It is necessary to improve the problem in time. Therefore, the maturity process of the product is relatively long. The common situation is: on the spot, using certain brand products, There will be some technical problems in the project. After using other brands of products, the problem can be solved. It is not the big mistake of the previous brand product, but its applicability is not as good as the latter brand product. Generally speaking, the tuition fee is not paid. Enough, there are not enough problems encountered, and the product design is not well thought out, so choose a professional production company's products, because its products are relatively mature. The manufacturer's nominal indicators, especially VGA signal products, matrix equipment is the core equipment of the display. If the problem is a global problem, the whole system will be paralyzed, so stability and reliability are overwhelming, and the price is high. One point, even if the indicator is lower, it must be stable and reliable.
In terms of technical support, the problems encountered in the engineering site are very strange. The technical support capability of the manufacturer is an important indicator. It has independent research and development capabilities, and has a correct understanding of the mechanism of the problem. The product has strong applicability, stability and reliability. Strong on-site resolution capabilities of manufacturers cooperation.
1. The matrix switcher can send any input to any output or multiple outputs at any time.
2. According to different models, the matrix switcher can send composite video and stereo audio (balanced/unbalanced).
3. The matrix switcher can accommodate multiple signal types, however, a certain signal type of the input can only be sent to the output terminal of the signal type.
In other words, the composite video input can only be sent to the composite video output terminal.
How to use matrix switcher?
Matrix switchers are used in corporate conference rooms, military, control centers, classrooms, restaurants, home theaters, and video conference rooms.
The following uses an example of a matrix switcher for a restaurant. Three audio/video information and one audio-only information are input to the composite video matrix switcher (SB-5548). All inputs will be sent to one or more of the eight displays connected to the matrix switcher and to the audio system.
Hotel customers can watch the video played by the DVD player through two projectors, and the live broadcast through the digital satellite system is also sent to the TV area. The audio system plays music at the same time. Switch the different inputs to different outputs by pressing the button.
Matrix switcher purchase 1) Category selection, broadcast and video conferencing applications, should use broadcast-grade products, monitoring applications can use monitoring products, VGA signals (some people also regard it as video) to use VGA signal matrix.
2) Size selection: In one project, the audio signal and video signal and VGA signal should be regarded as three different media. Audio signals generally have a large number of inputs, such as microphones and CDs, as well as audio from disc players. However, considering that amplifiers and stereos are generally only one set, at most one mixer can be added to the mixer before mixing. It may take several Road signal, so the output of the audio matrix will not be very large, such as 32 × 8 or 64 × 8, but it is not necessary to choose 32 × 32 or 64 × 64, unless it is broadcast and video conferencing transmission, there must be audio for each video Synchronous transfer.
In the design scheme, the number of signal sources is relatively easy to determine. See how many sources, the input quantity of the matrix is ​​fixed, but the number of independent output channels should be considered, which is determined according to the operating mode of the system. Sometimes there may be only a few display devices that have a distribution relationship (which is always consistent with each other, not independent). Then consider occupying an output port and adding an allocator. If these devices are likely to be independent, they are still independent. The output is better.
In many cases, the number of inputs and outputs is large. If a large matrix is ​​used, the cost will be higher (the larger the matrix, the harder it is to do and the higher the cost). Consider whether it can be grouped, for example, when monitoring, you can make the display wall In some display devices, only the signals of a certain area are displayed, and other devices respectively display signals of other specific areas, then the large-scale matrix can be divided into small-scale matrices (for example, dividing 128×64 into 4 sets of 32×16) If there is a possibility that signals need to be transmitted between the zones.
As a part of the transmission system, the matrix switcher can be found in the "Common Problems and Solutions in Engineering". The principle is the same. It is nothing more than several mechanisms. As long as the phenomenon can be distinguished and solved. There should be no major problems with the direction. More specific is the use of small-scale matrix to form a large-scale problem, for example: when using 64 × 32 to form 128 × 32, you can not use two 64 × 32 to form 128 × 64, this is still the concept of group use, and application three The station 64×32 is composed of 128×32, which is the concept of full matrix. Therefore, the difference between group use and full matrix should be distinguished when combined. (The whole matrix means that each output can be selected in all inputs and independent of each other. ).
3) There are many manufacturers who choose the production matrix, and the nominal indicators are different. Since such equipment is not a laboratory prototype, but an engineering application product, the applicability and reliability issues in the project are very important. The situation of the project site is different. In the process of product maturity, it needs to undergo continuous engineering inspection. It is necessary to improve the problem in time. Therefore, the maturity process of the product is relatively long. The common situation is: on the spot, using certain brand products, There will be some technical problems in the project. After using other brands of products, the problem can be solved. It is not the big mistake of the previous brand product, but its applicability is not as good as the latter brand product. Generally speaking, the tuition fee is not paid. Enough, there are not enough problems encountered, and the product design is not well thought out, so choose a professional production company's products, because its products are relatively mature. The manufacturer's nominal indicators, especially VGA signal products, matrix equipment is the core equipment of the display. If the problem is a global problem, the whole system will be paralyzed, so stability and reliability are overwhelming, and the price is high. One point, even if the indicator is lower, it must be stable and reliable.
In terms of technical support, the problems encountered in the engineering site are very strange. The technical support capability of the manufacturer is an important indicator. It has independent research and development capabilities, and has a correct understanding of the mechanism of the problem. The product has strong applicability, stability and reliability. Strong on-site resolution capabilities of manufacturers cooperation.
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