Video surveillance delivers unprecedented abilities to monitor and manage the risks of today’s business environments. These easy to use systems are successfully working to help reduce theft, workplace violence, and fraudulent workman’s compensation claims.
Analog System : Cameras on an analog CCTV system send their video in the traditional base band format over coax cabling back to a digital video recorder (DVR). Here, video is digitized and stored on hard drives. Most modern DVRs are a network device, and as such can be accessed remotely from the LAN, or with the proper configuration, from across a WAN or the internet. Video is kept on hard drives, typically on a FIFO basis so there is always a rolling video archive of the past X days. So, despite the fact that video is being transmitted from the cameras in an analog format, live and recorded video is still available over the network.
IP Video System : IP video cameras broadcast their video as a digital stream over an IP network. Like an analog system, video is recorded on hard drives, but since the video is an IP stream straight from the camera, there is more flexibility as to how and where that video is recorded. The DVR is replaced with an NVR (network video recorder), which in some cases is just software since it doesn’t need to convert analog to digital. Video footage can then be stored on new or existing network RAID drives as directed by the NVR software.
And the biggest factors driving interest in IP video systems is the high resolution that they can offer. Analog cameras max out on resolution at about 680 TVL which equates to roughly 0.6 mega pixels. High end IP cameras on the other hand, are currently available at resolutions above 5 mega pixels. This high resolution in turn gives users the ability to zoom in on video after the fact, and still have usable video.
Another benefit to IP video is that it is much more compatible with wireless. Wireless analog systems are available, but they either have to convert to IP anyway and broadcast over the 802.11 IP network (which adds cost for encoders), or they get crammed onto the over saturated regulated frequencies and often encounter interference.
Wireless security camera systems: it take away the worry of video cables running around your property all you need is a power source. Using the latest digital technology, some wireless CCTV cameras offer an improved transmission range of up to 200m. Although these cameras are often easier to install and move around than wired ones.
Video Analytics (Management): Video Analytics, also referred to as Video Content Analysis (VCA), is a generic term used to describe computerized processing and analysis of video streams. Computer analysis of video is currently implemented in a variety of fields and industries; however the term “Video Analytics” is typically associated with analysis of video streams captured by surveillance systems. Video Analytics applications can perform a variety of tasks ranging from real-time analysis of video for immediate detection of events of interest, to analysis of pre-recorded video for the purpose of extracting events and data from the recorded video (also known as forensic analysis).