Network video surveillance – at home in the network

Network-based or IP video surveillance cameras compress the video signal and transmit it via network (LAN or WLAN). The data is saved to the PC or network recorder which is connected and is decompressed and transmitted to the monitor for display. A considerable advantage of the IP technology can be found in the higher resolutions into the megapixel area. Furthermore, existing IT technology can be used for transmission and analysis of the surveillance images, making it an inexpensive solution. 


IP video surveillance components

  1. Just like analog cameras, the picture information contained in the light hitting the lens is recorded. When using cameras with a megapixel resolution, make sure the lenses used are of adequately good quality.
  2. The cameras generate the actual picture information via the image sensor, correct the image, compress the data and forward them to the network using the integrated web server.
  3. The signals are transmitted via LAN cables or WLAN. Using “power over ethernet”, the power can even be supplied directly by the LAN cable. 
  4. The recorder saves the image data on the hard disk drive and processes them for display on a monitor.
  5. The compressed streams are decompressed for display. A PC with the appropriate software or a special network video recorder can be used to do so.

What is compression?

The compression of video data reduces the size of the video data so that – in comparison to non-compressed video formats – data transmission is much faster and less memory space is needed for storage. The higher the compression, the more data can be stored or transmitted via the network.

Read more about the technology used and different compression types in our FAQ on video surveillance.

Questions & answers

Security glossary