Seven elements of network camera selection

2023-08-04 04:08:25

At present, the third-generation network video surveillance system represented by network cameras and network video servers has made great progress, and its share in the global market has increased rapidly. Gradually, it has been widely used in projects around the country. The â€œSafe Cityâ€ in the country, The â€œGlobal Eyesâ€ project is setting off the climax of online video applications. Network video vendors have mushroomed rapidly across the country, and there have been a large number of online video surveillance product brands on the market. Other IT vendors or traditional industries have also joined the competition in the online video industry and have launched their own network video products and solutions. Program.

In the face of numerous network video surveillance products on the market, how engineering and end-users choose products and solutions has always been a headache. It is hoped that by analyzing the key elements of the selection of network cameras in network video surveillance systems, it can be given to contractors. And some end-user suggestions, choose the right product and solution.

Operating System Need a stable operating system, no doubt embedded Linux operating system is a great choice. Currently, most of the network cameras on the market are embedded operating systems and use Linux2:6 or higher kernels. Linux is free software and open source, low cost, high security, and strong portability. It has always been the first network video operating system. Selection is currently one aspect of judging the quality of webcam.

Audio and Video Compression Format Network Camera Compression Format The methods have their own characteristics. The difference in the compression format directly determines the image quality and bandwidth occupancy. The current mainstream compression format is H.264. H.264 brings image compression technology to a higher stage and can provide high-quality image transmission at a lower bandwidth. This advantage is very suitable for a large number of domestic operators and a relatively limited access network/backbone bandwidth. . With the same picture quality, H.264 saves an average of 64% of the transport stream compared to the previous-generation encoding standard MPEG2, and saves an average of 39% of the transport stream compared to MPEG4ASP. Many IPTV service providers around the world use H.264 as the codec format standard, including Belgium Telecom, Netherlands KPN, ADC Telecom Thailand, and China Telecom. For system integrators and end users, we need to pay attention to the fact that although many vendors on the market today claim that their network cameras are H.264 compression formats, they are not necessarily standard H.264. Standard H.264 image compression format images can be played through standard streaming media playback software and can be connected to multi-brand surveillance systems. H.264 image stream has a relatively low bandwidth, and it can be imagined that the audio and video synchronization signals can be transmitted well in a 3G network.

Rich product external interface network cameras also need to have a wealth of external interfaces, to provide more value-added features, such as providing external alarm input and output interfaces; two-way audio interfaces: analog video output interface; supports MiniSD memory card Support POE power supply: RS485 PTZ control interface. The rich interface can meet the special needs of industry users, and bring unexpected surprises to system integrators and users to meet specific functions.

Completely Open SDK Development Kit At present, many network video vendors on the market can provide SDK development kits, but many manufacturers SDK SDK is relatively poor compatibility, SDK SDKs are often only compatible with the latest version of the product, can not be compatible with previous versions of hardware products, and even different network cameras There are different SDK development kits. At present, this situation is common in some network video surveillance vendors. Therefore, before the development of system integrators, an SDK SDK for network cameras must be evaluated. It is also necessary to understand the network camera vendors' involvement in network monitoring. , need to understand technical support capabilities.

Product security management mechanism network video products generally need to be connected to a local area network or even the Internet for remote access, so that the security of the network camera is especially high demand. Currently, the network camera security management mechanism on the market only has a multi-level user name and password protection function, allowing authorized users to access and modify the configuration of the network camera. Only with such a security protection mechanism is not enough, generally also need to have IP address filtering, HTTPS data encryption algorithm, for network cameras that support wireless transmission, also need to have DES/3DES and other functions. Some network video vendors in the market have perfect log management functions. The login user's IP information, operation records, etc. are recorded in detail for system query. Several of the security management mechanisms we mentioned here are mainly for the front-end network cameras, and for the entire network video surveillance system, other parts need to be implemented in conjunction with security management mechanisms. For example, the network transmission department needs to increase the corresponding firewall software and hardware, and the back-end management software industry needs to provide corresponding network security management mechanisms, etc., to strengthen the use of personnel security management transactions to prevent security management password leakage and other events. Only in this way can the security of the entire network video surveillance system be guaranteed.

Remote upgrade and maintenance products for online video, the upgrade of maintenance is a very important thing, a good network video products can provide a variety of firmware upgrade options such as FTP, HTTP, batch management software tools Upgrading firmware and other methods, flexible and various upgrade methods can bring many conveniences to customers, and can be flexibly managed according to their own preferences. For network video products, how to maintain the product after a fault is also a very important issue. Whether the product error system is alarmed or not, whether the product has a heartbeat mechanism, and the initiative to send device information to the platform management software is also a very important aspect.

A sound system supporting software tools for a good network video products, also need to provide customers with the tools to manage a small supporting software, such as easy to find the IP address management software, firmware upgrade management software, Storage capacity calculation management software, PDA handheld computer on-site debugging network camera management software, etc., through a variety of management software to the customer's special application brings convenience. Through these details, you can observe the degree of specialization of a company's network video surveillance products.

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