Introduction and application of matrix
Video matrix refers to the method of array switching to output any video signal to any nThe electronic device on the road monitoring equipment, generally the input of the matrix is greater than the output, that ism>n. Some video matrixes also have audio switching functions, which can switch video and audio signals synchronously. This matrix is also called a video and audio matrix. In terms of implementation methods, the current video matrix can be divided into two categories: analog matrix and digital matrix. Video matrix is generally used in various monitoring situations.
To put it simply, there are many common input devices in conference rooms: cameras, DVD , VCR">, physical exhibition booths, desktop computers, many laptop signals, etc., but very few display terminals: projectors, plasmas, large screen displays,
The role of the matrix comes out. It can send any signal from the device that provides the signal source to any display terminal. The audio and video can be synchronized or not synchronized, which is convenient and cost-saving. Common types are divided according to the interface type (VGA, AV, RGB), and of course the mixing matrix, which is the different interface types in the device, and is divided according to the number of interfaces, such as 8 series 8In2Out, 8In4Out,8Enter8Exit
According to the grade, there are telecommunications broadcast grade: there is no flicker or snowflake when switching, it is very stable, you can watch CCTV's program is known. Next is the professional matrix. When switching, the screen will be slightly black, but there is no flickering. Next is the civilian matrix, which is used in most conference rooms. There are flickering snowflakes and jitters at the moment of switching, but the picture is very stable after switching.
Video Matrix-Basic functions and requirements
A matrix system should usually also include the following basic functions: character signal superposition; decoder interface to control the pan/tilt and camera; alarm interface; control host, as well as audio control box, alarm interface box, control keyboard and other accessories. For domestic users, the character overlay should be in full Chinese to facilitate the use of operators who do not understand English. The matrix system also needs to support cascading to achieve higher capacity. In order to adapt to different users’ requirements for matrix system capacity, the matrix system should support modularization and plug-and-play (PnP), you can achieve different capacity combinations by adding or reducing video input and output cards.
The development direction of matrix systems is multi-function, large capacity, networkable and remote switching. Generally speaking, a matrix system with a capacity of 64×16 is a large-capacity matrix. If a larger capacity matrix system is required, it can also be achieved by cascading multiple matrix systems. The larger the matrix capacity, the higher the technical level required, and the more difficult it is to design and implement.
Video matrix classification
According to different ways of realizing video switching, video matrix is divided into analog matrix and digital matrix.
Analog matrix:
Video switching is done at the analog video layer. Signal switching is mainly implemented using microcontrollers or more complex chips to control analog switches.
Digital Matrix:
Video switching is done at the digital video layer, and this process can be synchronous or asynchronous. The core of the digital matrix is the processing of digital video. It is necessary to add AD conversion at the video input end to convert the analog signal into a digital signal, and to add DAConversion, convert digital signals into analog signal output. The core part of video switching is changed from the analog switch of the analog matrix to the processing and transmission of digital video.
The function and principle of video matrix
The matrix can send any signal from the device that provides the signal source to any display terminal. It can synchronize or desynchronize the audio and video as desired, which is convenient and cost-saving. Common types are divided according to the interface type (VGA, AV, RGB), and mixing matrices, which are different interface types in the device, and are divided according to the number of interfaces, such as 8 series are8In2Out, 8In4out, 8in8out and so on.
According to the grade, there are telecommunications and broadcast grade: there is no flickering or snowflakes when switching, and it is very stable. Next is the professional matrix, which has a slightly black screen when switching, but there is no flickering. Then there is the civilian grade, which is used in most conference rooms. There are flickering snowflakes and jitter at the moment of switching, but the picture is very stable after switching.
Shenzhen Xldcc Security Technology Co., Ltd. is a professional manufacturer of network high-definition matrix, HDMI matrix, VGA matrix, and video matrix. For details, please contact: 0755-33130307