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Video surveillance has entered the wireless are by guard summer
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Video surveillance has entered the wireless are |
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Business,Electronics,Science & Technology
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According to "cask law",the final image quality will depend on the entire monitoring system weakest link,and this is often the worst part of the transmission system.System designers and installers must actually need to select the appropriate transmission mode,high-quality transmission cables and equipment in accordance with , and then install professional standards in order to achieve the desired transmission effect.Usually the video signal transmission techniques using direct modulation to the baseband frequency ( approximately 8MHz bandwidth) forms , the most common transmission medium is a coaxial cable. Coaxial cable is specifically designed to transmit video signals, the frequency of loss of image distortion , amplitude attenuation images are relatively small , can be very good to complete the task of transmitting video signals . Generally use a dedicated SYV75 ohm coaxial cable series , commonly used models for the SYV75-5 ( without relay its video signal transmission distance is usually 300-500m); When distance, requires the use of SYV75-7, SYV75-9 even SYV75-12 coaxial cable (in the actual project, Thick no relay transmission distance up to 1km above ) ; also by increasing the video amplifier to enhance the video brightness , chroma and synchronizing signals, but also the interference signal line will be amplified , so the loop can not be too many video amplifier series, otherwise saturation phenomenon occurs , resulting in distortion of the image. Wi-Fi access to the rapid development in video surveillance applications, from the practical application of the market can be seen in wireless applications have begun to dominate the video surveillance market . The rapid escalation of wireless technology is the fundamental driving force wireless ip monitoring market developments to leading wireless technology as the basis , combined in many industries rich wireless network planning and project implementation experience, as well as the comprehensive advantages of R & D , services and brands on growing more customers are aware of the importance of wireless video transmission solution , and come to trust these similar APEXIS focus on wireless transmission , operators network coverage , video surveillance applications important brand , particularly those involving safe city monitoring , forest fire monitoring , tunnel monitoring , park area monitoring in many areas , port monitoring , wireless applications have made a lot of demonstrations and representative monitoring applications. In video surveillance applications projects, favored a wireless network obtained naturally has its reasons , the first is a wireless network through a decade of development, technology is very mature , the price is very cheap , wireless product line has been completely transition to the 802.11N standard , Bandwidth -point wireless bridge has been upgraded with several times , can easily meet the high bandwidth requirements of mainstream high-definition video , but the price is still down gradually, ordinary people can also be installed ; followed by video surveillance has gained widespread species in various industries applications, and rapid development to a broader and more in-depth application ; the other is more and more large-scale monitoring system architecture based on the network,all ip monitoring technology and the rapid development of the market to further promote the construction of infrastructure networks. Wireless networks as a part of the network, wired network can not be replaced with a clear advantage,convenient and flexible network construction , low cost , investment protection , use and reliable. It is based on the above three reasons, low- cost wireless ip monitoring market strong demand for ip monitoring into the mainstream , which spawned a huge market for wireless ip monitoring . There is strong demand and good technical support , more and more companies involved in the wireless network video surveillance applications , spawned many companies to promote wireless applications in video surveillance , in addition to numerous manufacturers of wireless products , but also actively doing their own efforts for the wireless surveillance market.
Related Articles -
wireless ip monitoring, network video surveillance,
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