seven elements of Selection the network camera

seven elements of Selection the network camera

Currently, network camera, network video server as the representative of the third generation of network video surveillance system has made great progress, the rapid increase in the global market share, gradually widely available around the project, the country's "Green City" "Global Eye" project is set off the climax of the network video applications. Network video vendors have sprung up across the country rapidly increasing, the market appeared a large number of network video surveillance products brand, other IT vendors or traditional industries also joined the competition in the online video industry, have launched their own network video products and solutions programs. The face of the market, many network video surveillance products, contractors and end-users how to choose products and to solve the program has been a troublesome issue, analysis of the Selection key elements of IP Camera network video surveillance system, you can give Contractors some suggestions and end-users to choose their own products and solutions.
Now combined with Viagra, as the dot-com Technology Co., Ltd. Shenzhen network video products, focusing on the front-end network camera selection need to pay attention to the analysis of the matters.
Operating system
Network video surveillance system is generally used for long-distance, large-scale monitoring, monitoring equipment needs to run continuously for a long time, which particularly high demands on the stability of the front-end equipment, stable network camera needs a stable operating system, no doubt embedded Linux operating system is an excellent choice. HD IP Camera on the market are mostly embedded operating system, the use of more than Linux2: 6 kernel, Linux is free software and open source, low-cost, high security, portability, has been the first of the operating system as a network video a choice is to determine the pros and cons of a webcam.
Audio and video compression formats
Network camera compression format, the market mainstream image compression format H.264, MPEG-4, M-JPEG, JPEG, MPEG-2, etc., each compression method has its own characteristics, compression formats the different directly determine the image quality and bandwidth consumption, the current mainstream compression format H.264. H.264 image compression techniques to a higher stage, can provide high-quality image transmission in lower bandwidth, the advantage is ideal for large domestic carriers, the access network / backbone network bandwidth is relatively limited conditions . The same quality H.264 coding standard than the previous generation MPEG2 average savings of 64% of the transport stream, rather than MPEG4 ASP average savings of 39% of the transport stream. Many of the world's IPTV service operators will be standard H.264 codec format, including Belgacom, the Netherlands KPN, Thailand ADC Telecommunications, China Telecom and so on. For system integrators and end-users, we need to note that, although currently on the market a lot of vendors claim their own HD IP Camera H.264 compression format, but not necessarily the H.264 standard. Standard H.264 image compression format image by standard streaming media player software to play, you can access the monitoring system of multi-brand. H.264 image stream occupied bandwidth is relatively low, it is conceivable in the 3G network, the transmission of audio and video sync signal.
The external interface of the product
Network camera also need to have a wealth of external interface to provide customers with more value-added features, such as external alarm input and output interfaces; bidirectional audio interface: analog video output interface; supports MiniSD card storage; support POE power supply: RS485 PTZ control interface. Rich interface to meet the special needs of industrial users, system integrators and users an unexpected surprise to meet a lot of features.
Completely open SDK development kit
Network cameras, must be able to provide completely open SDK development kit SDK development kit directly determine the flexibility and stability of the system management platform software. At present, most of the network video market vendors can provide the SDK, but many manufacturers relatively poor compatibility SDK development kit SDK development kit can often only be compatible with the latest version of the product is not compatible with previous versions of hardware products, and even different IP Camera There are different SDK development kit. In just getting started in network video surveillance manufacturers more common for systems integrators, before development, the need for network camera SDK development kit to do an assessment of the current situation also need to know the network camera manufacturers involved in network monitoring life requires an understanding of the technical support capabilities.
Product safety management mechanism
Network video products generally need to be connected in a local area network or even the Internet for remote access, particularly high demands on the network camera security. Security management mechanism of the network cameras on the market just has a multi-level user name and password protection feature that allows authorized users to access and modify the configuration on the IP Camera. Only with this security mechanism is not enough, the general also need to have IP address filtering and HTTPS data encryption algorithm for wireless transmission network camera, with DES/3DES function. Part of the network video market vendors has a complete log management capabilities, the logged-on user IP information, operating records are detailed records of system query. We mentioned here several security management mechanism for the front-end HD IP Camera, and for the entire network video surveillance system, you also need other parts with the implementation of security management mechanism. Such as network transport sector requires a corresponding increase in the firewall hardware and software, the backstage management software industry need to provide the appropriate network security management mechanism, strengthen the safety management transactions for the use of personnel, to prevent the occurrence of safety management password disclosure event. The only way to guarantee the security of the entire network video surveillance system.
Remote upgrade and maintenance
For network video, product upgrades and maintenance is also a very important thing, a good network video products can provide a variety of firmware upgrade approach, such as FTP, HTTP, tool management software bulk upgrade firmware, flexible upgrade can bring a lot of convenience to the customer, according to their preferences for flexible management. How to maintain a very important issue for network video products, after the failure of the product, whether the error system alarm, whether the product is a heartbeat mechanism, take the initiative to send the device to the platform management software is also a very important aspect.
Complete system supporting tools
For a good network video products also need to provide customers with supporting tools management software, such as IP address settings to find the management software, firmware upgrade management software, storage capacity calculations management software, PDA Pocket PC on-site commissioning network camera management software, through a variety of management software to the customer's specific application use. These details can be observed degree of specialization of a company network video surveillance products.
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