CCTV - Recording equipment

As with CCTV cameras, video recording has been changing rapidly over recent years. Rather than video tapes, analogue camera images are now recorded on digital video recorders (DVR). A DVR can vary from a memory card, which plugs into a camera and can be removed for viewing images on a PC, to a multi-channel networked device with built in data storage and links to external digital storage for long term retention of recordings. These DVRs can be on a network so enabling multiple authorised users to view/control images from any location with a suitable internet connection.

To take things a step further, IP video cameras connect directly to a network and a network video recorder (NVR) collects and stores data streams from these cameras.

As an alternative to an NVR, you can also use software installed on a PC or Server to record IP camera images. When all components are on a suitable network, viewing and controlling the system can be achieved from any location with suitable internet connection.

Because digital data is now being used, some DVRs and NVRs can have optional modules for video analytics.

These include: -

Automatic number plate recognition (ANPR - recording number plates or checking number plates against a database list and triggering relays to open car park barriers).

Trip wire detection (Recording or alarm generation when an object passes a defined line across the image)

Object movement (areas can be highlighted so that an alarm is generated if an object is removed or something is left too long. i.e. to protect museum pieces or monitor storage areas)

Counting trip wire (to count people or vehicles crossing a line drawn on the image in either direction)

Datasheets

 

Dedicated Micros SD Advanced Hybrid Analogue + IP DVR

Dedicated Micros Analytics Product brief

 

Samsung SRD-1650D DVR datasheet

 

Axis Camera Station software datasheet,