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Transmission cost comparison: Small monitoring system can be directly wired. Most of the cameras are within 200 meters. The cost transmission of the two devices is basically the same. Even if the switch is omitted, the use of HD-SDI system can be said that the cost may be Lower, equal to the original analog monitoring system, front-end cable directly into the center of the DVR and matrix, installation and commissioning is also relatively easy, for the installation of the dome PTZ and other all-round monitoring device operation control is also more convenient. For example, bank teller monitoring, buildings, and small factory schools are typical configuration examples.
The wiring cost of HD-SDI will be higher than that of the IP network system, because the price of the optical transceiver of HD-SDI is still relatively high compared with the price of the optical transceiver of network data, and the utilization rate of the optical transceiver resources in the HD-SDI system is lower than that of the IP network. System, so the cost of fiber optic cable is also higher, so when large and medium-sized systems are built, it is very difficult to use HD-SDI system completely, but it is limited to the defect of image quality and delay of IP network system. The system adopts a converged solution and is effectively integrated by the HD-SDI encoder (DVS) and the IP network system. Some key parts, as well as the dome and pan-tilt points, adopt the HD-SDI format, which can effectively solve the system's budget and system cost. Image quality conflicts.
System Application Transfer Problem HD-SDI video system adopts coaxial cable transmission, so it is similar in structure to the original SD standard analog system. The architecture is exactly the same. If the analog system is used for video transmission, the distance should not exceed 120 meters. When using radio frequency cables commonly used on radio and television, the distance should not exceed 250 meters. For distances beyond 250 meters, consider the use of HD-SDI signal amplifiers. Current amplifiers on the market can achieve about 1000 meters, if the distance can be further Using optical transceivers for transmission over optical fibers;
The main equipment of the back- end equipment HD-SDI signal system is the same as the analog system. It adopts DVR digital video equipment and switching control matrix host. The new high-definition DVR and matrix are compatible with various video signals, such as standard definition analog signals, HD-SDI signals and The IP network video signal greatly facilitates the mixed use of the SD system, the HD-SDI system and the network HD system. Since the HD-SDI signal is not encoded and compressed, the image quality is very good and it is suitable for display on large-scale video walls. Also due to the real-time nature of the HD-SDI signal, it is easy to operate;
Compatibility issues HD-SDI systems currently have some issues to be aware of, such as system compatibility issues. Because HD-SDI systems enter the security industry soon, various hardware manufacturers use different device solutions, different hardware, and test standards are not uniform. Factors, there are some problems with the compatibility of various products on the market. Not all devices are compatible, need to be tested and amended, and some new features of the device are not yet fully matured. The stability needs to be improved. These problems need to be resolved. The industry unified standards, slowly regulate.
Monitoring application and technical core of the financial industry <br> <br> I think the financial system is particularly suitable for use HD-SDI system, first of all, the financial system requires a high-definition and real-time, particularly suitable for use HD-SDI equipment; and Since the bank’s teller surveillance cameras are usually located at a short distance, the HD-SDI signal can be transmitted using the coaxial cable. No additional conversion equipment is required, which greatly reduces the cost of the equipment. There is also a DVR recording host with dual streams. Remote transmission of images online is also very easy.
<br> <br> transport system transportation industry due to the often capture license plates and vehicle identification contour color and so on, is very high image requirements, so using HD-SDI system is also very necessary. 
HD-SDI cameras are compared with traditional high-definition cameras. The traditional HD cameras mainly refer to the network HD. Image quality: Since the image format of the HD-SDI system is the original image that is directly converted into a digital serial port signal, it is output without compression coding. The image data is original and complete, and it is superior to the compressed image of the network in terms of clarity, color, and the like.