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  • Five technical resolution low bandwidth networks transmit high-definition video


        The high resolution IP surveillance cameras become customers a big demand for high-definition monitor support points, then in addition to IP cameras provide high-definition picture quality, the ability to support other hardware structure? Of course, the network bandwidth is a key issue.
        The network camera can handle more data than ordinary high-definition surveillance cameras, when a large number of video file information is stored within the LAN, it is necessary to recognize the limitations of the current environment to bring you; if you want to send these files out, you can The use of the network, of course, the wise, you will use low-bandwidth transmission of data, this is a good way to save capital.
        With high-definition video surveillance camera market gradually popular, security engineering, system integrators more full use of network resources and better management of the application of multi-point monitoring system. It is undeniable that insufficient network bandwidth to the video surveillance system to bring some trouble monitoring system, how to avoid the following five key areas to bring the technology bottleneck: video compression, image delay, select Send, distributed management and management needs.
        Video Compression
        Monitoring there are a lot of misunderstanding, the market for 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, and that it is how to achieve what compression its technology, many people do not understand.
        Importantly, the view from different vendors to provide the compression standard and you have completed the task, you should be aware of what is genuine. The high quality image compression used in the transmission of video images, a bandwidth of 1/2, while the poor compression techniques not only failed to provide a high-quality image, is occupied bandwidth. Compression technology can provide high-definition images to high frame rate of your low-bandwidth.
        Image lag
        Another important consideration in the direction of image lag. If you can do real-time video transmission from monitoring command center or to monitor large-screen point of view, the monitoring system when in grasping afraid image, if there is a delay of more than one seconds, then the back-end management it is difficult to capture information to trigger an alarm; administrators can quickly control the PTZ find the suspect.
        Monitor cameras from image capture to return the video center, the best time of the delay should be less than 100ms, HD-SDI security surveillance cameras able to do so, but the IPC optimum delay time has long been hovering between 200 ~ 300ms.
        Select Send
        Can control the function for data transmission is selected, most of the DVR or NVR. If you say that it is the motion detection, as it is part of the intelligent monitoring. -End monitoring does not trigger any event, the network at this time for the "idle" state, once a moving object through the network only by "non-essential" r "busy", the benefits of doing so is to save the hard disk storage space save network resources.
        Distributed Management
        Distributed management of its significance is that you do not need to "move" back and forth data surveillance cameras and monitoring center, connected only need to network and NVR using broadband to transfer data between them.
        For large-scale monitoring systems, distributed network video management advantages. Centralized monitoring point video server via a broadband connected to the Internet, will be collected to the video information to a central server, forwarding the video to all levels of users from a central server, in order to achieve 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.
        Management needs
        As a monitoring system administrator, you have to know what level the user is able to grasp what kind of data information. Equally or based on a distributed monitoring system, through a central service platform can do individual users can enjoy limited. Each enterprise users can only see their own video surveillance; enterprises in different levels of users can only see their own under video surveillance, and different levels of monitoring have different operational priorities.
        Administrators point for each segment, they must learn how to use the shared resources, without taking up the main bandwidth resources. Network monitoring as an important trend for the future monitoring market, able to be fully rational utilization of network resources, high frame rate camera is actually more important image information collected.

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