Analyzing the basic knowledge of matrix

[ Huaqiang Security Network News ] Do you know what a matrix is? Do you know about the matrix? The following will give you an in-depth analysis of the bits and pieces of the matrix:
Matrices, according to classification, can be divided into analog matrices and digital matrices. Since the advent of the analog matrix, it has been more than 30 years since its inception. As the core product of the CCTV era, it has also had numerous glory. However, with the development of video surveillance technology in the direction of digitalization, high definition, and networking, the development space of matrix products that originally occupied the analog video surveillance market began to appear stretched. Will the digital matrix replace the analog matrix? What is the difference between the two?
Analog matrix: The emergence of the lower cost 8816 chip and its introduction into the security industry, the single chip realizes the switch of 16 in 8 out, and creates the golden body of the first generation matrix, namely the analog matrix, so that it sits on the security as the general manager. The position of the chairman of the industry. In the past few years, the simulation matrix has made great progress after continuous improvement by multiple manufacturers.
Digital matrix: Digital matrix is ​​divided into compressed and uncompressed, while ordinary 1000M Ethernet can only barely transmit several uncompressed D1 video, so the real network matrix is ​​definitely a compressed digital matrix. Uncompressed digital matrices are difficult to popularize in the general civilian market due to the high cost (storage). The compressed digital matrix is ​​a network matrix based on broadband ADSL/100M/1000M Ethernet.
The generalized network matrix refers to a complete network monitoring system. It is not just a simple chassis like the analog matrix. There are few independent network matrix products in the general sense. The network matrix products of the company are considered to be More authoritative industry leaders. The external data interface of all products has only one network or one fiber, which can cascade tens of thousands of channels of video and complete analog matrix operation.
The digital matrix VS analog matrix video/audio input can be either an analog signal input or a digital signal input. It can directly input the analog signal of the front camera, or it can be digital signal input such as DVR, DVS, IPCAMER. The audio and video of the digital system come in pairs, eliminating the need for separate audio functions. It can only be the analog signal input video storage function. It can be flexible or centralized or distributed according to the network structure. It can also adopt multi-level storage structure to ensure the absolute security of the recorded data. Mass storage capacity of up to three months can be achieved on demand. No historical video playback can be played back to the TV wall remotely, which is very convenient to operate. That is to say, it not only realizes the real-time video of which way the analog matrix wants to see, but more importantly, it can realize the super-powerful function of the video when you want to see which way. No video/audio output can be output from the video wall through the analog signal, or the digital signal can be output to the video wall. BNC/VGA dual output. And the visual audio is synchronized, without the need for an additional audio module. Supports up to HDMI high-definition digital screen output, maximizing the advantages of large screens up to 120 inches above and simultaneously displaying multiple HD videos. It can only be an analog signal output. Can not directly output the VGA LCD screen, the middle needs VGA converter or expensive VGA matrix and multi-screen splicing TV wall processor. An audio module is required for audio output.
Local video switching output group switching, synchronous switching, program switching settings and command execution, switching forward and backward; remote high-speed ball and pan/tilt control, light and dark, far focus, near focus, preset setting, etc. . Fully implement all the switching functions of the analog matrix, and do a lot of optimization for each manual or automatic switching function, such as mobile video frame measurement alarm linkage switching and other functions. Have. Group switching, synchronous switching, program switching settings and command execution, switching forward and backward; remote high-speed ball and pan/tilt control, light and dark, far focus, near focus, preset position setting and other functions.
Group switching and program switching restrictions can perform 256 group group switching, each group supports 512 synchronizations, and each synchronization supports 1024 single switching. Support 512 sets of program switching, each program supports 1024 single switching. The alarm linkage supports the switching of the single alarm 16 pairs. Limited by the storage space of the MCU and the input interface, the general analog matrix supports 16 groups of group switching, each group supports 32 synchronous switching, and each synchronization supports 32 single switching. Support 16 sets of program switching, each program switching supports 32 single switching. Alarm linkage only supports one-to-one linkage switching.
The remote switching output can remotely perform various switching functions such as group switching, synchronous switching, and program switching. Supports up to 64 points of video wall switching to switch up to 1000 channels of video from multiple levels or multiple monitoring centers in the entire network, and simultaneously control the high-speed ball. No remote group switching, synchronous switching, or program switching. The built-in DVS module of the networking matrix can only be browsed remotely by four-way Ethernet. Limited by the serial port function of DVS itself, generally only one user can display or control remotely, and there is no way to switch historical video.
The main control and sub-control functions of the main control and sub-control functions are not restricted by geographical conditions, and the main control and sub-control rights can be executed on the remote network. The main control and sub-control are limited to the RJ45 matrix keyboard, and the remote control and sub-control permissions cannot be performed remotely.
The screen split function supports 1/4/9/16 screen splitting and supports multiple monitors at the same time. Support multi-screen segmentation during playback, and also support history and live video in the same window. No, the external screen splitter character overlay function is required. The system comes with system time, date, running status, camera title screen display and other characters. No character adders are required. Support system time, date, running status, camera title screen display, but requires a character stacker.
The camera's unified number recognition supports two encoding modes. When multiple systems have multiple matrices, all cameras can be identified by serial numbering, or the matrix number plus camera number can be used for encoding and recognition. For example, the input of the first station is 1-256, the input of the second station is 257-512, the output of the first station is 1-32, and the output of the second station is 32-64, then the first block can be executed in the digital matrix. The input of the road to the output of the 64th channel can also realize the output of the 512th channel to the 1st channel.
Single encoding mode, when the system has multiple matrices, it can only be the matrix number plus the camera number for encoding recognition. Moreover, it is necessary to continuously perform operations to achieve independent switching operations between different matrices, and the general case of input and output cannot be unified and full cross-switching between the matrices. For example, the input of the first station is 1-256, the input of the second station is 257-512, the output of the first station is 1-32, and the output of the second station is 32-64. Then the first one cannot be executed in the analog matrix. The input of the road to the 64th channel cannot realize the output of the 512th channel to the 1st channel.
The alarm input alarm comes from the network alarm host or the ordinary alarm host transferred through the serial port to the server program of the background alarm host on the PC. It exists independently of the digital matrix of the video input and output, and the whole network unified number is linked with the whole network. It is also convenient to access alarm signals in heterogeneous systems such as 110 through the network. It has 16 channels of alarm input and can be connected to the alarm host. The alarms of each matrix are independent of each other, and the alarm source is limited to a single switch alarm.
The alarm output is the same as the alarm input. The alarm output is a unified numbering mechanism of the whole network. It can link the alarm output across the network, and can easily output alarm signals to other heterogeneous systems through the network, such as mail or SMS. As with the alarm input, the alarms of each matrix are independent of each other and are limited to a single digital alarm output. Fortification and disarming use the principle of who is guarding who will be charged. Some parts of the multi-user defense are not armed. Of course, the lowest layer defaults to receiving all alarm signals and recording, but the selected alarm signals are forwarded to different users.
This approach greatly enhances the management of different alarm sources by managers at all levels. The analog matrix does not support multiple user-specific arming states. The remote DVS solution can't be used to compare rich multi-user alarm processing schemes.
The video linkage alarm alarm input is unified in the whole network, the alarm output is unified in the whole network, the source of the alarm input is extensive, the alarm output is in various forms, and the alarm linkage can also exert its superior characteristics. More typical functions include full-network mobile frame measurement alarm linkage output, and alarm linkage synchronous switching. Only one-matrix alarm linkage switching or output can be realized.
The large screen and the monitor image are switched to each other to adjust the image on the monitor to the large screen for output. The image between the large screen and the monitor can be adjusted to each other. The big screen has obvious advantages in multi-screen, and can watch more than 16 channels of video at the same time. The small screen can conveniently switch the program wheel, so in the special state such as alarm, the multi-channel video is continuously patrolled on the small screen. It can be displayed on the big screen simultaneously by synchronous switching. This can perfectly realize the special functions of the matrix in key monitoring.
The large screen of the analog matrix is ​​generally the image merged by the screen splitter, and the output mode of the large screen appears only after the analog matrix product has been put into the market for many years. It is very difficult to fully exploit the advantages of the large screen.
The video linkage electronic map alarm through the above alarm input, alarm output, linkage three aspects of introduction, the advantage of the digital matrix in the alarm is very obvious, in the electronic map is far more than the single alarm function of the analog matrix multimedia software, The most important thing is that it can report the electronic map remotely on the big screen, and can flexibly exchange video and map window through the main control software, which is impossible to achieve by analog matrix or multimedia software. Generally, only the map display function of a single analog matrix alarm can be realized.
Cascading achieves the interconnection of multiple heterogeneous systems based on the geographical system structure and the maximum program saving wire and communication costs. The front end can be partially concentrated and then cascaded upwards, completely breaking the limitation that the analog matrix is ​​limited by a single chassis. The cascading of multiple matrices can be continuously unified and unified, and can also be completely cross-switched across the entire network, completely achieving seamless splicing. It can be cascaded, but the wiring is cumbersome and the system is unstable. The number of cascades is limited by the physical chassis structure. The physical wiring structure of each chassis must be memorized during operation, and multi-level operation is very troublesome.
Keyboard operation is compatible with RJ45 matrix keyboard operation except network keyboard. RJ45 matrix keyboard operation and operation environment comparison network digital video monitoring system, there are sub-control requirements.

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