High resolution network surveillance camera have become customers a strong point of the large demand for high-definition surveillance system, then in addition to high-definition network camera provides high-definition picture quality, the ability to support other hardware structure? Network bandwidth is a key issue. Network surveillance camera can handle more data than ordinary hd ip camera stored video files, when the LAN, you must consider the storage and transmission of video files, it must make use of these files are sent The network, of course, use the low-bandwidth network transmission of large volumes of data is a good way of cost savings. With HD monitor network camera market is gradually fiery, security engineering, system integrators more full use of network resources, better management of multi-point monitoring system. Undeniable is insufficient network bandwidth to the video surveillance system to bring some trouble, and the specific implementation of the monitoring system, we have to solve or avoid the bottlenecks of the following five key areas of technology: video compression, image delay, select Send Distributed management and management needs. Monitoring product market there is a great misunderstanding of video compression H.264 video coding is regarded as the best compression technology. In the eyes of most people, H.264 is just a name for the video compression, that it is how to achieve compression and its technology is what many people do not understand. Important is provided by suppliers different compression standards will produce different compression effect, the high-quality image compression using only 1/2 of the bandwidth in the transmission of video images, and the poor quality of the compression technique is not only failed to provide a high-quality image, instead take up all the network bandwidth compression technology can provide a low-bandwidth, high frame rate HD image. Image delay is another important consideration in the direction from the monitoring command center monitoring the big screen point of view, the monitoring system to capture the image, if there is a delay of more than one seconds, then the back-end management it is difficult to capture the trigger alarm people information, if able to do real-time video transmission, the administrator will be able to quickly control the PTZ find the suspect. Return video surveillance camera captured from the image center, the best time of the delay should be less than 100ms, HD-SDI monitoring network camera able to do so, but the IPC optimum delay time has been able to control between 200 ~ 300ms. Who choose to send data, most of the DVR or NVR can achieve this function. It is not so much motion detection, than it is a part of the intelligent monitoring system, end network camera does not trigger any event, the network at this time for the "idle" state, once a moving object through the network before work, the benefits of doing so is not only saving hard disk storage space to save network resources. The Distributed Management significance of the monitoring system administrator does not need mobile network surveillance camera and monitoring center data back and forth, connected to the need to network and NVR using broadband to transfer data between them. Advantage for large-scale monitoring systems, distributed network video management, monitoring point video server connected to the Internet via broadband, video information will be collected on to the central server, forwarding the video to all levels of users from a central server, thus the unified management of the various points. Distributed network video management with distributed monitoring, centralized management, relying on the Internet for a digitized, networked surveillance systems. As monitoring system administrator, you need to know what level the user is able to grasp what kind of data information. Equally or based on a distributed monitoring system, through the central service platform can do individual users can enjoy limited, various business users can only see their own video surveillance, enterprise different levels of users can only see their own jurisdiction video surveillance point of information, the monitoring of different levels have different operating priority. Administrators point for each segment, they must learn how to use the shared resources, without taking up the main bandwidth resources. Network video surveillance as an important trend for the future monitoring market, able to be fully rational utilization of network resources, network camera select high frame rate is actually better to collect important image information.
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