What is AHD CCTV?

AHD (Analogue High Definition) CCTV is the new standard format or CCTV surveillance equipment which was released in 2015 which typically uses coaxial cable with BNC connections. As you may know traditional analogue CCTV equipment worked on TV Lines (TVL) to determine the capture and output resolution up to a maximum resolution of WD1/960H (960x576 pixels).

However the newer AHD format allows much greater resolutions, at the time of writing this article, up to full HD at 1920x1080 pixels or 2.4MP. A 720p AHD camera is roughly equivalent to a 1000TVL analogue camera. The upper limits of AHD have yet to be fully revealed, but for now up to 1080p is a significant improvement over the original analogue format.

Is AHD compatible with analogue equipment?

Yes it is! The beauty of this advancement in surveillance technology is that AHD cameras are compatible with analogue DVRs and vice-versa. Also AHD still uses the same cables with BNC connectors for video transmission; whether you have coaxial or a CAT5e cable set up currently, the new cameras will easily replace those older cameras without any issues.

How does AHD compare to IP cameras?

Talking purely about video quality; IP technology will always have superiority over coaxial based systems such as analogue, AHD, HD-SDI, TVI or CVI purely because of the way IP technology transmits data. IP cameras can also reach much higher resolutions than AHD with some of the cameras we supply reaching up to 2048x1536 pixels, and use network cable such as CAT5e, CAT6 and so on to transmit their footage and with any purely digital connection it either delivers a perfect image or no image. Of course, you can have lag with data connections and drops in frames but this generally only happens on extremely long or complex networks.

IP systems also have much more advanced networking functions available, such as being able to find each camera individually on the network and the cameras can even be powered via the network cable with POE.

How does AHD compare to TVI (Turbo)?

TVI technology is still a relatively new player in CCTV, and the most famous TVI range currently on the market is Hikvision Turbo range, and other manufacturers have been releasing their own ranges. TVI video quality offers purely 1080p video output and our honest comparison of AHD to TVI is that TVI video quality is superior. The way TVI technology processes images is much more true to life than AHDs capture quality. Beyond that, there isn’t a great deal of difference between the two, except you may find that TVI uses just a little bit more hard drive space for the level of detail it picks up.

Price Differences

IP CCTV is still relatively expensive; TVI still lies in the mid-high range but AHD CCTV on the other hand is very reasonably priced and there is very minimal price difference between AHD and traditional analogue. So if you are looking to get a HD CCTV system at a sensible price then AHD CCTV might be the choice for you.

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