In the world of high-definition surveillance system solutions, HDSDI, HDCVI, HDTVI, AHD technology will undoubtedly be more worthy of mention out of. As the nexus, hovering between analog and digital surveillance monitoring, dedicated high-definition monitor them, what kind of their fate? HD-SDI technology grafting difficult, more difficult to survive. For persons engaged in the field of video surveillance for security, HD-SDI technology is not strange, familiar and unusual. In the analog monitor HD monitor phase shift, which was once known as the main trend of future development. The fact verification, it is short-lived, gradually being submerged in the network HD world. Advantages: Lower cost of renovation to ensure high-definition picture quality. HD-SDI solutions on the basis of the original analog SD system on the replacement cost savings. HD from SD turn angle, the original analog standard definition CCTV systems can replace HD-SDI interface front-end and back-end products, to complete the upgrade to high-definition monitor, without the need to replace all the existing transmission network. Analog HD surveillance system is based on the existing analog surveillance system on the SD, do not spend too much time to train, do not need to train the users habits, post maintenance cost of the product will be reduced. These features greatly attracted engineering companies and end users. Safe city construction has been the climax, smart city also emerged in the field of video surveillance images increasingly demanding. Traditional analog SD systems has been difficult to maintain the existing state of existence, the transformation has already started. In addition, some important areas, but also in urgent need of high-definition reconstruction, and the need to ensure security. HD-SDI solutions can meet these needs. Defects: transmission distance is short, high interconnection costs, cable demanding. HD-SDI solution, the transmission distance is short. Just 100 meters with the same cable transmission distance. Facing the current trends in network security monitoring, HD-SDI transmission of non-IP digital signal, to achieve network monitoring also needs to be IP-based digital signal, which would increase costs. Ancillary equipment needs, in order to popularize it must improve its ancillary products. Finally, the higher the quality of the transmission cable, coaxial cable does not meet the national standard if the transmission quality will be a problem in Fig. The original project in terms of the existence of non-standard wiring cable wiring problems. HDCVI megapixels HD system benefits fade. With the same background HD-SDI solutions facing, HDCVI million high-definition HD also committed to addressing the needs of under simulated background. The difference is, HDCVI from Zhejiang Dahua Technology Co., Ltd. released its HD interface standard in line with the food completely independent intellectual property rights. Advantages: cost-effective, easy to operate, safe, reliable, low cost HDCVI products higher cost. HDCVI millions of high-definition picture quality to meet the needs of the majority of users to monitor, entry-level 720P is HDCVI field has been added to the price of traditional analog cameras, so that the high price. In addition to the higher cost, its system architecture is also simple and pure. HDCVI system is plug and play, simple and pure, real-time transmission system without delay. After hardware line connectivity, you can use the system, is one of the most easy to use megapixels HD systems. Also because HDCVI system simple and pure, great stability and reliability of the system is guaranteed. Closed-loop transmission - information security protection. HDCVI system is a closed loop transmission, will not disclose any data, so high security in the financial industry, will have the same closed-loop system using analog transmission. Coaxial line is not reform, Plug and Play - easy renovation project to upgrade. Based HDCVI technology products because not only can use the existing cable 75-3, and the transmission distance can reach more than 500 meters, you can use the original full power lines and other advantages, HDCVI accentuates the strength of powerful applications. Products supporting the whole, many cooperative manufacturers. Current HDCVI system products have been very well equipped, and the front has a 720P, 1080P, and can meet indoor and outdoor surveillance, morphology bolt, hemisphere, ball machine, infrared fill light and non-infrared products have to meet low illumination, wide dynamic product demand. Defects: front end equipment renewal costs, transmission distance is limited. HDCVI up from concept to understand, is based on coaxial cable transmission using analog modulation techniques progressive scan HD video, analog surveillance technology is an upgrade product architecture, which is still analog closed-circuit monitoring system. In addition, HDCVI only responsible for collecting the signal is not responsible for compressed signal, limiting the transfer mode can only be done by a maximum 200w @ 30 frames inevitably limited in HD quality. HDCVI series front-end non-compressed, resulting in large back-end data, the image transmission, although you can use the original part of the analog monitor transmission cables, but the front-end, Optical, backend needs to be replaced. Meanwhile, HDCVI effective transmission distance of about 400 meters, 400 meters above the transmission signal attenuation serious, there is no equipment to provide signal amplification, it is impossible to achieve transport 400 meters above solutions, and scalability in general, can not be integrated intelligence analysis. HD-TVI analog monitor breakthroughs HD-TVI coaxial high-definition video transmission standard that is based on coaxial cable HD video transmission standard, as a new analog HD solutions on the market, its ability to compensate for existing analog HD defects. Advantages: extend the transmission distance and lower costs, less storage capacity TVI can convert digital signals to analog, it will be able to extend the transmission distance, the lower the total cost, and less storage capacity is required. Its up to 300 to 500 meters from the coaxial cable through the transmission. In addition, TVI can be conveyed CVBS 75 ohm analog signals, and the realization of 1,080P and 720P 30fps transmission, these are difficult to achieve with other HD coaxial solutions. Users can even replace their only analog cameras and DVR into TVI cameras and DVR, you can get a new 1080P system, without the knowledge or with any other special spending extra labor costs. Development: vast demand 旳 Asia will be the first to use the technology market. Because in Asia, unstable bandwidth still makes want to establish a reliable IP system integrators headache. On the other hand, there are still many people lack adequate IP knowledge. These two factors hinder the promotion of IP systems in Asia. Thus, in about 50% of Asian and installation industry who prefer to find a solution like TVI so easy to use. Whether customers need a new system, or just a part of the renovation project, they are almost impossible to completely abandon the existing analog system or coaxial cable. Therefore, companies should provide customers with a variety of transfer to all-IP products and methods, including the integration of IP / HD-SDI as well as other products, including TVI, will provide a more practical and cost-effective solutions. AHD cited widespread concern insiders AHD HD field as freshmen security products and technologies, has aroused widespread concern in the industry. Advantages: Low cost, long-distance, without delay, high efficiency, interference AHD with traditional equipment as simple and convenient operation, with ordinary 75-3 class can be done as far as 500 meters coaxial HD lossless transmission, breaking the transmission limits of the existing high-definition video transmission technology, to achieve low-cost, long-distance, no delay, high efficiency, noise immunity and easy to implement megapixels level HD video transmission. AHD followed analog SD transmission ways and means to reduce the complexity of the construction deployment, reduce maintenance costs and complexity of auxiliary and technical requirements for construction workers. Ideal for upgrading the old system, can not change the basis of the original system, based on the SD easily upgrade to HD. In addition, high-definition quality SD prices, so AHD in civil and industrial markets have a very big space for development.
Posted on: Mon, 13 Oct 2014 06:59:05 +0000
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