In the transmission and storage , systems integrators through cost inputs can be solved ; displaying and managing HD manufacturers need to spend some effort to improve the underlying hardware and software ; 's effect in improving night vision , investment is relatively small , and it is most likely to be able to allow the user satisfaction improvement solution.
Compared with standard-definition video surveillance , high-definition network surveillance advantages are clear , but through two years of marketing , will inevitably encounter the following types of questions:
1 , storage
On a question referred to the problem of huge data flows , data aggregation to the center, or if each node is stored on the central inlet pressure of bandwidth and storage capacity is a major challenge.
Solution:
Currently only done IPSAN and invested heavily on the storage medium , IPSAN best use of embedded architecture , much less plug boards , high stability, but the drawback is poor compatibility moment, secondary development less flexible . NVR products on the market are mostly based on X86 architecture , which is the server plus array card , install the application software, servers and disk arrays combo, compatibility is better. If you use IPSAN way , you need to use storage media enterprise-class hard drive , so as to play a IPSAN in the data storage speed and security benefits . For some small systems, does not require too long if you save time , while the data security requirements are not too high , can use the market mainstream server to complete the storage function.
2, the transmission
HD network camera 720P or 1080P generally will choose a solution , if you want to achieve the desired image effect , we need 2 ~ 8M network bandwidth , if a system were to have a few hundred points , and that the flow of data across the network will be quite large , and the video stream is a real-time data streams , will continue to cause network-related switching equipment constant pressure , which requires adequate network planning in doing homework .
Solution:
As costs continue to reduce the optical cable , fiber optic local area network can add switches to form high-performance high-speed network , Gigabit to the desktop is a very easy thing . With the popularity of broadband networks , especially this year, has just launched the " triple play" , the rate of households have reached tens of megabytes to hundreds of megabytes, Copper light eventually brought us cheap high speed internet . For remote for high-definition video transmission is already not too long time.
3 , the management of
Many manufacturers or according to the traditional definition of thinking to do analog cameras HD IP Camera , bought ready-made hardware solutions , using the MPEG4 standard algorithms provided by third parties , only provides a network interface for a simple look digitize the back platform as how to camera hardware, and data flow management , as he did those underlying core algorithms and technologies simply can not achieve .
Solution:
Choose possible hardware interface with a rich front-end devices, such as alarms , SD card, intercom , audio, 485 , etc., in a project scenario Party can request for flexible combinations , no longer need a separate additional customization features. Software should have a variety of access methods, such as WEB, client , a large platform that can provide the SDK can be very flexible , and third-party software for docking. Function modules to complete as much as possible , such as the police, streaming media, storage services, etc. , can be directly used in the project .
4, the display of
Many HD manufacturers just focus on the front-end network camera pixels , without a corresponding development of high-definition video decoder , only around a PC screen to watch high-definition images , high-definition images can not be independent in the large displayed on the screen .
Solution:
For high-definition screen TV wall, we have developed a high-definition decoder , the front-end transmission over the HD graphics for effective reduction connected to large screen high-definition input interface, high-definition picture perfect to show on the screen above .
5 , the night side
In the case of day -lit , high-definition is very easy, once applied in low light or night surveillance when needed , HD became powerless it. Since most of the high-definition network camera using CMOS sensor, which is less sensitive to light , if not with infrared light , in the night is dark, and we monitor most of the time period you want to prevent precisely at night , so will make the high expectations of high-definition video systems became a decoration.
Solution:
Our night vision surveillance has accumulated a wealth of experience , depending on the field environments provide different solutions. Programs such as infrared light , IR CUT technology, illumination chips.
Summary:
In our HD products frenzy behind , it should be more calm to analyze which of the five practical problems , every problem that how to solve this is to many manufacturers rarely consider that their concerns are often confined to a certain product itself, as long as the pixels high , that is, high-definition , and is a high-end system solutions . The solutions provided only viable theory , you can not really go to the actual project implementation . Some even will only have a 1.3 megapixel front-end , through software processing , shocked to upgrade to 300 million or even 4 million pixels.
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