Video Recorder Unit

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 Video Recorder

A video recorder is an essential device in a CCTV system. Initially, analog video recorders with VHS tapes were used for this, and with the advancement of technology, digital video recorders are used today. Well, let's see what a Digital Video Recorder (DVR) is.

Video in a DVR is recorded on a hard disk. DVRs are manufactured according to the number of cameras they can fit. (eg - 4 Channel DVR, 8-channel, 16-channel, 32-channel). And there are mainly 2 types of DVR.

1. PC-based DVR

2. Stand-alone DVR

Any desktop computer can easily be turned into a PC-based DVR. But PC-based DVR is not very popular. Therefore stand-alone DVR is widely used.

Stand alone DVR 

Front view of a stand-alone DVR


Rear view of a DVR and accessories


 

 DVRs have many different features and below are some of them.

1. Remote viewing - This allows the DVR to be accessed remotely via the Internet (Remote logging). It can be viewed and controlled remotely from the cameras in this DVR from a computer or smartphone anywhere in the world.

2. Motion detection - Some DVRs can detect motion. That way, the DVR can be set to record only when that movement occurs or to emit an alarm signal if necessary.

3. Alarm in/Alarm out - The DVR can provide signals from outside sensors and devices that provide signals from the outside can also be installed (eg - when a door is opened, an alarm signal can be set to operate). 

4. PTZ camera control - PTZ-type cameras can be handled.



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