There are two types of security cameras systems, Analog and IP
(sometimes refered to as network cameras). Here is a very basic
explanation of how they work and what the major difference is
between analog surveillance systems an IP camera systems. Analog
surveillance systems: Most security cameras on the market today
are standard analog security cameras connected directly to a
digital video recorder. The cameras is this type of system
consist of a lens, DSP chip (digital signal processing chip) and
a housing. The cameras are simply the window used by the DVR
(digital video recorder) to see. The cameras are connected to
the DVR using transmission cables. There are many types of
cables, but they will all have a connection directly to the DVR.
The DVR is the heart of this system. The security digital video
recorder receives the video from the camera, compresses it and
stores it on a hard drive to be retrieved later. Most DVRs also
convert the analog video to digital format and are able to
stream that video over t