People looking to install security cameras in their home or business
have many options when selecting a camera system to install.
Traditionally, most security cameras have been CCTV (Closed Circuit
Television) style cameras which transmit video over an analog coaxial
video cable. These cameras generally have a digital image sensor and
then convert the video to an analog video signal to transmit over a
coaxial RG59 video cable and plug into a Standalone DVR or PC-Based DVR
with a BNC style connector. DVRs or PC-Based DVRs would then convert the
video from an analog signal to a digital signal once again for storage
onto a hard drive. In the last few years, a new style of security camera
has become popular for many installations. These newer style IP
security cameras have changed the way that many people look at the way
security camera systems are planned and installed. IP security cameras
contain a digital image sensor similar to the traditional CCTV cameras,
however instead of converting the video immediately to an analog signal
for transmission to a DVR, these new IP cameras compress the video using
their embedded video processing chips and then transmit the cameras
over a standard network cable back to a PC with NVR (Network Video
Recorder) software. Many home and business owners are confused by
conflicting stories about each type of system, making it difficult to
choose a system that will work well for their instance.
Each type
of system has benefits that should not be overlooked when selecting a
system to suit your needs. Traditional CCTV cameras are much less
expensive than most of the IP cameras on the market, and are completely
interchangeable. Almost every traditional CCTV camera transmits the same
format video, so cameras from one system, even an older VCR based
system can even be plugged into a newer DVR. Despite many
misconceptions, most recent traditional CCTV DVR systems also provide
access over the internet, many even from PDA cell phones. When properly
planned, these systems can deliver great picture quality and the ability
to keep watch of your home or business over the internet with minimal
impact to your budget. Newer IP camera NVR systems offer newer
technology which can in many cases deliver higher quality video
recording (sometimes higher than HDTV resolutions). These IP camera
systems can allow home or business owners to achieve great views for the
security of their business with fewer cameras in many cases. These
cameras require only a single network cable to run to each camera,
lowering the difficulty and cost of cabling in many cases however IP
camera systems in general are usually not a lower cost, as the cameras
are generally more expensive. Many of these systems even support the
higher definition megapixel IP cameras, delivering 4-22 times the
resolution of a traditional security camera. These NVR systems also
usually offer remote viewing capabilities over the internet so that your
IP cameras can be viewed from anywhere. Because IP camera NVR systems
are still in their infancy in the industry, each camera communicates
differently, so the NVR system that is chosen must be programmed to
accept each brand, make and model of IP camera, otherwise it would not
function with the NVR. These limitations can make it difficult to expand
IP camera systems unless the added cameras match the list of supported
cameras.
Many home and business owners have been led to believe
that they need to purchase an IP camera system in order to view their
cameras over the internet, however both types of systems are remotely
viewable. Others may want the lower budget traditional systems, but do
not want to limit their ability to expand their system in the future to
include IP security cameras. That is why many PC-Based DVR systems like
our Alnet Systems PC based systems can operate in a Hybrid DVR /NVR
arrangement. These systems provide a compromise between budget and
future expansion, allowing users to create a system with some
traditional CCTV cameras and some IP security cameras. The Hybrid
systems usually consist of a PC with a PCI or PCIe DVR card installed to
provide inputs for the number of traditional CCTV cameras as well as a
license for added IP security cameras. With this type of system, all of
the cameras can be viewed on the PC screen and recorded together onto
the hard drive. These analog CCTV and IP cameras can then also be viewed
remotely together over the internet from a PC, Laptop, BlackBerry,
Android PDA phone, iPhone, iPad and many other cell phones as well.
With
hybrid capable security camera DVR systems like our Alnet Systems DVR
cards, home and business owners can start out with analog security
cameras alone, and simply add license later for added IP cameras or
additional cards for more traditional CCTV cameras. The ability to
expand the system slowly and use both newer and older technology
together make hybrid systems a great choice to help meet budgetary
requirements and still deliver desired features and picture quality.
When building your next security camera system, consider finding a
system that will allow both lower budget and higher definition IP
cameras together.
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