Quality CCTV & Burglar Alarm At Affordable Prices
CCTV Manchester UK
Telephone: 0161 480 9380
Quick Quote: 07870565644
CCTV House
6 Rectory Old Gardens
Wilmslow Rd SK8 1BX
info@aaacctv.co.uk
Our Service:
At AAA CCTV Manchester We supply and fit the best quality equipments at
affordable prices
below is some information for you to decide the best suited cctv system for
your particular requirement.
CCTV DVRs are based on computer technology and as such they record images on
an internal hard drive. With these recorders you do not need to change tapes
or video cassettes and as all the recording are done on the HD video images
are always as good as day one.
DVRs normally come with three different specification which obviously
affects the price.
if you are only interested in local onsite viewing, then you can go for the
cheaper Jpeg DVRs. these DVR product good image and different makes have
different features which of course is reflected in the price again. , for
example , some have remote control, on some you can back up your CCTV
evidence and video images on USB memory sticks, some have CD writer, some
you can only make copies of your recording via connection to a pc or
ordinary home DVD recorder, and so on.
If your intention are to view the cctv images over the internet from home or
another pc then you will need to go for a Mpeg4 or H264 compression DVR.
These offer better compression rate which in turn offer faster movement of
images over internet. These CCTV DVRs normally come with more features for
back up, etc and of course this is reflected in their price which is higher
than Jpeg DVRs. These CCTV DVRs specially H264 compression ones enables you
to record more video images on a smaller size hard drive than Jpeg DVR,
Basically, given a certain size of hard drive, Mpeg4 offer twice the
recording length of Jpeg and H264 offers twice the recording length of
Mpeg4. Therefore a H264 CCTV DVR offers you four times the recording time of
a Jpeg recorder.
CCD V Cmos: The image quality of CCTV cameras are determined by the quality
of the internal electronics and image sensors. there are Cmos sensor cameras
which are very cheap and the image quality is really terrible with lots of
colour bleed and unclear images. There are also CCD cameras which produce
much better colour definition and image quality, apart from the unbranded
CCD cameras , there are cameras that have sensors made by Sharp , Panasonic
and Sony. Cameras That have Sony Sensors seem to produce the best image
quality and are more expensive than Panasonic or Sharp. BUT you must be
aware that there are some Supposedly Sony CCD cameras that are NOT Sony at
all, in other words they are FAKE!!. Therefore you must always buy your CCTV
Cameras from Reputable and accredited Supplier.
TV LINES: another factor affecting CCTV cameras both in Cmos Format and CCD
is the TV Lines.
(this is the number of horizontal lines that that produce images. CCTV
cameras come in 380 TVL, 420 TVL, 480 TVL, 520 TVL and 540 TVL. The higher
the TVL the more expensive is the camera. However the higher the TVL
does not necessarily means better quality images this is due to the fact
that monitor or TVs need only 380 TVL anyway so a 420 TVL camera is more
than enough for a good image quality . BUT it must be mentioned that one
advantage of high TVL camera is that the higher the TVL the better
definition in the dark or deem condition. So for example in a night club a
520 TVL camera is more suited than 420 TVL. Under for example
fluorescent lights 420 TVL camera is more than sufficient, so you don't need
to pay more to get 540TVL cameras.
AAA CCTV Greater Manchester
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