AHD stands for Analog High Definition and it is a higher definition version of the typical analog CCTV systems. AHD is one of the competing technologies available now that can transmit up to 1080p video using existing coaxial cabling. This technology is a good option for users looking to transition their system from analog to high definition. However, it is important to note that analog system are quickly being phased out and replaced with more technologically advanced systems like IP.
High definition analog systems transmit video via standard Coaxial cable for up to 500 meters with no latencies. The cabling is the same as HD-CVI systems. Also like CVI systems, AHD is able to obtain 720p and 1080p resolutions. This high resolution picture is what makes AHD systems so much more popular than the older analog systems. Typical analog is only able to reach a resolution of 960h which is much grainier than 720p or 1080p.
While the cabling and resolution is quite similar to an HD-CVI system, AHD is often less expensive. Also, it is able to support the Analog matrix and video divider which CVI cannot. As the lower resolution analog systems are being phased out many users will be transitioning to high definition systems. AHD is a good place to start. When using Analog High Definition surveillance cameras you must also have an AHD compatible DVR. Before upgrading your cameras to HD, make sure your DVR is compatible.
However, it is important to note that the industry is continuing to push into IP, Ultra HD systems and leave HD-over-Coax systems behind. Coaxial cable can be difficult to replace which makes upgrading or changing and HD-over-Coax system difficult and time consuming. IP systems have fewer cabling issues and many are able to obtain up to a 12mp resolution image. The ease of installation and incredible picture quality makes IP a favorite for many installers and industry insiders.
For customers looking to make the transition from analog to IP, Analog High Definition is a good starting point. It is only slightly more expensive than low resolution analog but it offers a much better picture quality. In the near future we do expect to see AHD completely replace analog as the industry continues to evolve into higher resolution territory.
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