When it comes to ensuring that you can record audio as well as video through your surveillance system, there’s a new kid on the block. The new HD-CVI standard is rapidly becoming incredibly popular because of its affordability, its ease of use, and its ability to support audio as well as video recording – all over one coaxial cable. Here’s what you need to know about HD-CVI cameras and how to add audio to your surveillance system.


Low Cost, High Adaptability


High Definition Composite Video Interface, or HD-CVI represents the height of analog technology. That’s right – HD-CVI cameras are not digital cameras. However, they do offer full HD video that passes, uncompressed, over a simple coaxial cable line – the same line that goes into the back of your set-top box or your television at home.


HD-CVI offers the ultimate in cost-effectiveness, as these cameras are only nominally more expensive than older, traditional analog CCTV cameras. These cameras offer much longer ranges than digital cameras, either those linked by Ethernet or IP cameras running off a wireless network; HD-CVI cameras can be as far as 1500 feet away from the receiver thanks to their resilient cable solution. In fact, these cameras run on the same coaxial connection as these older cameras, it’s a snap to upgrade an existing surveillance system with these newer security cameras as the single coax cable carries video and power at the same time. Additionally, you can use pan-tilt-zoom (PTZ) motorized HD-CVI cameras with a single coax connection as well, as instructions can be transmitted over the line as well.


Setting Your Security System for Audio


Of course, coaxial cable also carries audio signals in addition. This makes HD-CVI camera systems the ultimate in both video and audio surveillance in any number of situations. However, just because you have the ability to send audio back and forth (that’s right, you can send audio both ways over coax to a speaker system), you’ll need to have the rest of your equipment prepped and ready as well.


First you will need to ensure that the HD-CVI cameras you’re buying for your new system or you’re using to upgrade an existing analog CCTV security camera system come equipped with a microphone or a microphone and speaker. However, with the popularity of HD-CVI security cameras growing like wildfire it is unlikely to be much of a challenge to find the camera model you need. The second step could prove more problematic, as you might need to upgrade your DVR system; if your current security DVR supports coaxial audio input, you don’t have anything to worry about, but if your DVR doesn’t have that capability you’ll need to ensure you find a new one that will be compatible. Again, with the rise of the HD-CVI standard there is an abundance of security DVR systems to choose from if you do need to upgrade, which makes it relatively easy to pick the right DVR for the job.