Digital video
recorder
(DVR) is a
consumer electronics device
or application software that
records video in a digital
format to a disk drive, USB
flash drive, SD memory card
or other local or networked
mass storage device.
Digital video recorders
configured for physical
security applications record
video signals from closed
circuit television cameras for
detection and documentation
purposes. Many are designed
to record audio as well.
DVRs have evolved into
devices that are feature rich
and provide services that
exceed the simple recording
of video images that was
previously done through
VCRs.
- A DVR CCTV system
provides a multitude of
advanced functions over
VCR technology including
video searches by event,
time, date and camera.
- There is also much
more control over quality and
frame rate allowing disk
space usage to be optimized
and the DVR can also be set
to overwrite the oldest
security footage should the
disk become full.
- In some DVR security
systems remote access to
security footage using a PC
can also be achieved by
connecting the DVR to a LAN
network or the internet.
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