What is network video The server

    Network video server （DVS,digital video server)， Also known as digital video encoder, it is a professional network transmission equipment for compressing and processing audio and video data. It consists of audio and video compression codec chip, input and output channels, network interface, audio and video interface RS485 serial interface control, protocol interface control, system software management and other components are mainly used to provide video compression or decompression functions, complete image data acquisition or restoration, etc. At present, the popular MPEG-4 or H.264 based image data compression transmits data through the Internet network and processes audio data.

After the development in recent years, it has gradually developed from single function video transmission to WIFI network, local SD card storage, or USB storage or IDE hard disk storage; The transmission channel has gradually developed from the original single channel to an integrated system of single channel D1, two channel HD1, four channel CIF and multi channel compatible multi menu operation and management. 　

At present, Network video server The communication mode of "" has also gradually developed from the original simple wired network to the compatibility of wired and wireless WIFI (802.11a bg communication protocol), and the wireless transmission distance has also developed from the original tens of meters (30-100 meters) to the current tens of kilometers (30-50 kilometers).  

　　 Network video server And simulation video camera Connected together, a digital camera, also known as an IP camera, is an intermediate product in the transition from an analog camera to an IP camera. Some network video servers have the storage function. This kind of product is similar to the Digital Video Recorder (DVR) has been very close to each other in terms of functions, with a trend of gradual integration.