Page 270 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

I/O connection for tilt pan zoom (PTZ) camera
Event notification from security devices
Notification for connectivity issues
DVR Software Features:
Image capture by the user or triggered by an event

Set resolution of recording by the user or by an event
H.264 Video compression for higher resolution at lower bandwidth
Video analytics such as dwell time, the direction of movement, and motion tracking
Alarm, event, and time search functions
Multi-channel audio recordings

Archived footage
DVRs are limited to the physical number of input channels and are not upgradable. This makes them best
suited for small businesses or home security systems. Network Video Recording (NVR) is a cloud-based video
surveillance recording solution that can be upgraded at any time. Analog limitations mean DVR record is much
lower quality than a network solution and also the video is always stored locally versus in the cloud.
How Do DVR Security Systems Work?

[Digital video recorders] connect to analog cameras via coaxial cables and contain internal hard drives and
encoding software; this means all footage is processed and stored locally. Let’s look at the main features to get a
better sense of how these systems work.
Connects Directly to Cameras: As DVR systems don’t operate wirelessly, each camera must be connected
individually to the device using cables.
Operates on a Closed Circuit: DVR camera systems aren’t connected to a network in the same way that other
modern surveillance systems are; they operate like conventional CCTV solutions.
Captures Analog Pictures: Digital video recorders are primarily intended to be used with analog cameras, though
companies with existing systems can easily upgrade and replace this hardware with better quality versions as
needed.

Processes Video Data at the Recorder: DVR systems use an encoder, which ensures the images captured by a
camera are recorded and sent to an enterprise’s chosen storage destination.
Stores Footage on a Hard Drive: DVR systems rely entirely on on-premises data storage, meaning they must be
configured to a server or PC.
Pros and Cons of DVR Security Systems:
Though DVR video surveillance seems outdated because—unlike other technological solutions—it doesn’t require
an internet connection, these security camera systems have still evolved throughout the years. And as with any
technological device, DVR camera systems come with their own set of benefits and challenges.
Benefits of DVR Camera Systems:

Cost-Effective Set Up: Compared to NVR, cloud, and hybrid cloud systems, DVRs are an affordable security
solution for small businesses. Costs do vary depending on the number of cameras required and whether or not
professional help is needed for installation, but there are initial savings due to the fact that DVR systems integrate
with lower quality cameras.
Secure Connections: Since no internet connection is needed in order for analog DVR camera systems to work,
they can be set up almost anywhere, including remote locations—provided there’s a power source. This lack
of network connectivity also helps to eliminate the risk of security systems being hacked, making for a secure
surveillance solution.
Instant Access: DVR systems are hardwired—they connect directly to CCTV cameras. This means video is
instantly stored on a hard drive and is easily accessible. So long as surveillance staff are onsite, they can watch
footage as soon as it’s been recorded.

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CITS : E & H - Electronics Mechanic - Lesson 146 - 154