Square array Ethereum

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The hardware structure of the backplane switch is used to realize the high-speed point-to-point connection between the circuit boards of the switch. The switching matrix provides a mechanism to forward packets simultaneously on each point-to-point connection between slots
switching matrix (switching board), also known as crossbar chip, is a kind of hardware chip with multiple ultra-high rate interfaces, which is generally used for high-speed data forwarding between data processing chips or high-end switch cross line card
crossbar is called crossbar matrix or crossbar matrix. In the beginning, Ethernet switching was built on the basis of shared bus, which can provide limited switching capacity. On the one hand, it is because of the inevitable internal conflict of shared bus; On the other hand, the load effect of shared bus makes the design of high-speed bus more difficult. With the demand of switch ports for "exclusive bandwidth", this shared bus structure quickly developed into shared memory structure, and later evolved into the most advanced crossbar structure in the instry. The switching matrix (switching network board) of crossbar structure completely broke through the limit of shared bandwidth, and there was no bandwidth bottleneck in the switching network, There will be no blocking e to insufficient bandwidth resources

First, the camera and the hard disk video recorder are connected to the same LAN. After the camera lines are centralized, all the cameras are connected to the video distributor (generally 16 groups of 1 in 2 out video distributors), and two groups of signals are allocated. One group is used to backup data for the hard disk video recorder, one group is used to access the signal matrix, and the matrix output is connected to the monitor. In this way, the image needed can be output to the monitor through matrix switching

extended data:

development history of monitoring:

1. The first generation of traditional analog closed-circuit video monitoring system (CCTV): relying on cameras, cables, video recorders and monitors and other special equipment. For example, a camera outputs video signals through a dedicated coaxial cable. The cable is connected to special analog video equipment, such as video splitter, matrix, switcher, VCR and video monitor

The development of digital matrix is changing with each passing day. In terms of application, performance, function, stability and operation convenience, monitoring digital matrix has obvious advantages compared with traditional analog matrix, The advantages of monitoring digital matrix different from analog matrix are mainly shown in the following 20 aspects:
■ single machine can provide 32tb storage space at most
■ single machine can support 1024 CIF video input and 36 D1 video output
■ four VGA LCD / plasma / DLP output
■ single screen can reach 1280 * 1024,1,4 9 screen arbitrary segmentation
■ support all networked video cross machine switching, including linkage switching, synchronization switching, program switching, alarm linkage switching and other automatic switching functions, as well as manual switching functions
■ remote high-speed ball and cloud mirror control, such as aperture, zoom, Preset position setting and other functions
■ the front section can be locally centralized and then connected to the upper level
■ the cascade of multiple matrices can be connected with a unified number
■ the whole network cross switching can be realized
■ the seamless splicing switching can be realized
■ compared with the project control digital matrix, the traditional analog matrix video / audio input can be either analog signal input or digital signal input. It can directly input analog signal of front-end camera, or digital signal of DVR, DVS, IP camera, etc. The audio and video of digital system appear in pairs, and there is no need to connect the audio function alone. The digital matrix can flexibly adopt centralized or distributed storage according to the network structure, and can also adopt multi-level storage structure to ensure the absolute security of video data. According to the demand, it can realize the mass storage function for more than three months. No history video playback can be remotely replayed to the TV wall, and the operation is very convenient. That is to say, it not only realizes the real-time video of which way the analog matrix wants to see, but also realizes the super function of which way and when it wants to see. No video / audio output can be output to TV wall through analog signal or digital signal. BNC / VGA al output. And video and audio synchronous output, without additional audio mole. Support up to HDMI high-definition digital screen output, maximum display up to 120 inches of large screen at the same time show the advantages of multi-channel high-definition video. Only analog signal output. It can't output directly to the VGA LCD screen. It needs VGA converter or expensive VGA matrix and multi screen splicing TV wall processor. Audio mole should be added in audio output. Local video switching, output group switching, synchronization switching, program switching setting and instruction execution, forward backward switching; Remote high-speed ball and pan tilt control, bright light and dark, far focus, near focus, preset position setting and other functions. All switching functions of analog matrix are fully realized, and various manual or automatic switching functions are optimized, such as mobile video frame test alarm linkage switching and so on. yes. Group switching, synchronization switching, program switching setting and instruction execution, forward backward switching; Remote high-speed ball and pan tilt control, bright light and dark, far focus, near focus, preset position setting and other functions. Group switching and program switching limit can execute 256 groups of group switching, each group supports 512 synchronization, and each synchronization supports 1024 single switching. Support 512 groups of program switching, each program supports 1024 single switching. Alarm linkage supports more than 16 pairs of single alarm switching. Limited by the storage space and input interface of MCU, the general analog matrix supports 16 groups of group switching, each group supports 32 synchronous switching, and each synchronous supports 32 single switching. Support 16 groups of program switching, each program switching support 32 single switching. Alarm linkage only supports one-to-one linkage switching. Remote switching output can remotely perform group switching, synchronous switching, program switching and other switching functions. Up to 64 sub point TV walls are supported to switch all 1000 channels of video from multi-level or multiple monitoring centers in the whole network, and control the high-speed ball at the same time. No remote group switch, synchronous switch, program switch function. DVS mole is built in the networking matrix, which can only be browsed remotely by four-way Ethernet. Due to the limitation of DVS's serial port function, it only supports remote display or control by one user, and there is no way to switch historical video. The main control and sub control functions are not limited by geographical conditions, and can execute the main control and sub control permissions in remote network. The main control and auxiliary control are limited by RJ45 matrix keyboard, and cannot remotely operate and execute the authority of main control and auxiliary control. The image segmentation function supports 1 / 4 / 9 / 16 image segmentation, and supports multiple monitors to split multiple images at the same time. Support multi screen segmentation ring playback, and also support history and real-time video in different windows. Without this function, it needs the character superposition function of the external image divider. The system comes with system time, date, running status, camera title screen display and other characters. No character adder is required. Support system time, date, running status, camera title screen display, but need character overlay. Camera unified number recognition Jiuding digital matrix supports two coding modes. When multiple systems have multiple matrices, all cameras can be identified by unified number, or matrix number plus camera number can be used for coding recognition. For example, the input of the first set is 1-256, the input of the second set is 257-512, the output of the first set is 1-32, and the output of the second set is 32-64. In the Jiuding digital matrix, the output from the first input to the 64 can be executed, and the output from the 512 input to the first set can also be realized. In single coding mode, when the system has multiple matrices, only matrix number plus camera number can be used for coding recognition. Moreover, it is necessary to continuously perform operations to realize the independent switching operation between different matrices. Generally, it is impossible to realize the unified numbering and full cross switching of input and output between various matrices. For example, the input of the first set is 1-256, the input of the second set is 257-512, the output of the first set is 1-32, and the output of the second set is 32-64. In the analog matrix, the output from the first input to the 64 can not be executed, and the output from the 512 input to the first set can not be realized. The alarm input alarm comes from the network alarm host or the common alarm host transferred through the serial port to the PC to form the server program of the background alarm host, which is independent of the Jiuding digital matrix of video input and output. The unified number of the whole network and the linkage switching of the whole network. Through the network, it is also convenient to access the alarm signals in 110 and other heterogeneous systems. It has 16 alarm inputs and can be connected to the alarm host. The alarm of each matrix is 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 in the whole network. It can be linked with the alarm output in the whole network, and it can easily output the alarm signal to other heterogeneous systems through the network, such as e-mail or SMS. Like the alarm input, the alarms of each matrix are independent of each other and are limited to a single switch alarm output. The principle of "who sets up the defense receives the alarm" is adopted for setting up and removing the defense. It supports multi-user, part of which is set up and part of which is not set up. Of course, the default of the lowest layer is to receive all alarm signals and record them, but the selected alarm signals will be forwarded to different users. This way greatly strengthens the management personnel at all levels to deal with different alarm sources. The analog matrix does not support multi-user with different defense States, and the remote DVS scheme can not present more abundant multi-user alarm processing schemes. Video linkage alarm, alarm input unified number of the whole network, alarm output unified number of the whole network, alarm input has a wide range of sources, alarm output in various forms, alarm linkage can play its more superior characteristics. Typical functions include the whole network mobile frame test alarm linkage output, alarm linkage synchronous switching. Only single matrix alarm linkage switching or output can be realized. The image on the monitor can be output on the large screen by switching between the large screen and the monitor image. The images between the large screen and the monitor can be adjusted to each other. The large screen has obvious advantages in multi screen, it can watch more than 16 channels of video at the same time, and the small screen can easily switch the program round, so in the special state of alarm, the multi-channel video on the small screen can be displayed on the large screen at the same time through synchronous switching. In this way, the special function of matrix in key monitoring can be perfectly realized. The large screen of the analog matrix is generally the image merged by the image divider, and the output mode of the large screen is only appeared many years after the analog matrix procts are put into the market, so it is very difficult to give full play to the advantages of the large screen. Video linkage electronic map alarm through the above three aspects of alarm input, alarm output and linkage, the advantages of Jiuding digital matrix in alarm are very obvious. In the aspect of electronic map, it far exceeds the single alarm function of analog matrix multimedia software. The most important thing is that it can report that the electronic map can be displayed on the large screen remotely, And it can exchange the video and map windows flexibly through the main control software, which can not be achieved by analog matrix or multimedia software. The first mock exam can only display the single map matrix alarm. Cascade according to the geographical system structure, the maximum program to save wire and communication costs, realize the interconnection of a variety of heterogeneous systems. The front end can be centralized locally and then connected to the upper level, which completely breaks the limitation that the analog matrix is limited by a single chassis. The cascading of multiple matrices can unify the unified number continuously, and also can realize the real cross switching of the whole network, so as to realize the 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. When operating, we must remember the physical wiring structure of each chassis, multi-level operation is very troublesome. Keyboard operation in addition to the network keyboard, compatible with Jiuding 3D matrix keyboard gs-k101 operation. Compared with the network digital video monitoring system, the matrix keyboard operating environment has the demand of sub control. Multi level network monitoring. Traditional analog closed circuit monitoring system

Model ipv6hf16-48v16 (16 * 1) instrial high definition digital matrix external architecture 3U frame type (customized) supports CPU number 2 Intel Xeon 64 bit processor motherboard server level (7x24 hour operation) memory maximum 16x DIMM memory slot, maximum capacity 128GB, DDR3 1600 Hz non ECC, The standard hard disk of UN buffered memory system is equipped with 60g SSD solid state hard disk operating system Windows 2008 server 64 bit network interface and al network interface, 10m / 100M / 1000m adaptive Ethernet port output ports 16 channels display interface VGA / DVI / HDMI video input 48 channels 300W (2048 * 1536p) video output 16 channels 300W (2048 * 1536p) video wall chassis size w428mm * h133mm * d658mm power supply rated 500W (imported power supply) weight ≤ 20kg