Perfect Integration of digital video monitoring and Wireless Networks

The development of wireless network technology leads to the maturity of wireless video technology. For the digital information age, the perfect combination of digital video monitoring and wireless network technology will certainly produce more powerful technologies.

Video Monitoring is an intuitive and convenient way to record detailed information and provides real-time monitoring for monitoring operators. Video surveillance has become a necessary means in public security, enterprise security, land security, and even community and home security fields. The specific application industries and fields include: public security, transportation, finance, public enterprises, enterprise production, commerce, large stadiums, gymnasiums, customs, national defense, border defense, residential communities, etc.

Currently, the video monitoring system is transforming from analog video monitoring to digital video monitoring. Using analog video monitoring, or upgrading from analog video monitoring to digital monitoring and wired connection, this is the initial phase of the monitoring system transformation process. Using Digital Video Monitoring and wireless connection will quickly accelerate the transformation process of video monitoring.

During the transformation from analog video monitoring to digital video monitoring, you can consider using digital wireless video monitoring to solve the following problems:

● Wireless networks provide more efficient and flexible network bearer methods for video monitoring. Compared with traditional wired networks, wireless network can be used for wireless monitoring in areas where wired networks are originally inconvenient to deploy or cannot be deployed. For the sake of environmental beauty, it is increasingly important to use wireless cabling instead of Wired cabling.

● The price is valid. This can save a lot of cable network deployment costs. Compared with traditional cabling, including pole cabling or trench cabling, the prices are comparable. The Wireless Mesh Network (WiMesh) technology used here is different from the ordinary Wireless LAN, the ordinary Wireless LAN also requires a lot of network wiring, and the Wireless Mesh Network (WiMesh) only a small amount of network wiring is required.

● Digital video surveillance devices can convert image information into IP-based video streams. With advanced network technology, they can achieve communications from the LAN to the WAN or even the world. This allows the monitoring administrator to perform various monitoring operations anywhere on the network. At the same time, two-way video communication can be achieved.

Set up a wireless video front-end device that supports WLAN access in the wireless mesh coverage area (for example, an IP camera that supports WLAN or an IP video server and a simulated camera ). The collected IP video signals are sent back to the monitoring and processing platform of the network center through the wireless mesh network. Generally, the network center rack supports multi-channel network video recorders and large-capacity storage systems for monitoring video recordings and storage, and provides real-time monitoring images for one or more network monitoring terminals, remote monitoring and management can also be achieved from remote video monitoring terminals through secure network connections (such as VPN.

Typical deployment modes of Wireless Video Monitoring

The following are typical IP video system units used in wireless monitoring networks:

● IP camera

An IP camera is an integrated video front-end device that integrates analog video image acquisition and digital video image processing functions. It can convert analog video signals to digital signals in standard format (generally using M-JPEG or MPEG 4) and directly provide IP network interfaces. Through the WLAN wireless bridge, you can easily turn the IP camera into a wireless video front-end device that supports wireless transmission.

● IP Video Server

An IP Video Server is usually used to connect to a simulated camera. It can convert analog video signals to digital signals in a standard format (generally using M-JPEG or MPEG 4) and directly provide IP network interfaces. Through the WLAN wireless bridge, the IP Video Server can be easily converted into a wireless video front-end device that supports wireless transmission.

Using an IP video server, you can freely select the analog camera type. You can purchase analog cameras with different prices and performance to meet your needs.

● WLAN wireless bridge

The WLAN wireless bridge can be used to convert IP video devices (such as IP cameras and IP Video Servers) with wired network interfaces to extend the wireless network transmission capability. The WLAN wireless bridge Adapter should generally support the conversion from the Ethernet interface to the 802.11b/g wireless LAN interface, which can meet the long-term fault-free work (the average working time of the WLAN should be no less than 10,000 hours ); at the same time, an external antenna interface should be provided to meet the external expansion antenna needs under different installation conditions. Some manufacturers such as Nortel's wireless mesh network can support wireless video terminal devices based on 802.11b/g wireless LAN standards.

● Network video recorder

Network recorders are based on dedicated high-speed video image processing hardware and large-capacity digital storage systems (such as hard disk arrays or tape drives) for high-speed processing and storage of video stream information returned by multiple IP video front-end devices. The network monitoring terminal can be located in the same location as the network video recorder (such as the Network Monitoring Center), or remotely log on to the network video recorder through a secure network connection (such as VPN, implement remote monitoring management. Network video recorders can have a variety of different models based on different application and capacity requirements. They generally have different specifications that support 4, 8, 12, 16, 32, or even 50 video recordings.

● DVR software management and monitoring terminal

The DVR software management and monitoring terminal is a Monitoring Management Terminal and software video recorder based on the PC platform. It is usually suitable for video recording in small video monitoring networks. In addition, the DVR software management and monitoring terminal can be used as a network monitoring terminal for real-time monitoring and browsing and related monitoring and processing.