CCTV SERIES—ANALOG AND IP CAMERA SYSTEMS

Have you ever seen a crime drama movie or TV show where a bunch of police are gathered around surveillance footage and suddenly one of them says: “Wait! Zoom in on that guy! Enhance the image!” and then suddenly, miraculously, the grainy and blurry footage of what might be vaguely a human becomes a precise, crystal clear vision of the culprit? They identify the perp, bring him in, and case closed.

Well, that’s total fiction. In reality, that grainy footage from that analog security camera is only going to get blurrier and grainier when you zoom in for a closer look. But all is not lost! We are indeed living in the future, and IP cameras are the wave of it. No longer does security camera footage have to consist of the poor quality, narrowly focused images we’re used to seeing on analog CCTV.

However, it comes at a cost. Not some metaphorical cost, like “your soul” or something, but an actual monetary cost. So you have to ask yourself…Should you hop on the IP train? Well, that’s why we’re here: to give you the run down so you can decide for yourself if the upgrade is worth it.

What’s an IP Camera and how is it Different from Analog?

IP stands for Internet Protocol, and basically refers to a digital video camera that can send and receive data via a computer network, as opposed to sending a feed to a Digital Video Recorder (DVR). This is advantageous for a lot of reasons:

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• Picture Quality: The best analog surveillance camera still can’t hold a candle to the worst IP camera when it comes to the resolution of the image it captures. At best, an analog camera can manage the equivalent of less than half a megapixel, whereas a Megapixel camera wouldn’t be much good if it didn’t produce an image of at least ONE of the things it’s named after. Many IP cameras we stock are available in 2, or 4mp configurations, which is far better quality than you could hope to achieve with a traditional CCTV camera. Additionally, IP cameras capture a much wider field of view than comparable analog cameras, meaning a single IP camera is potentially able to do the job of three to four of the old school cams.
• Video Analytics: This is a fancy term that basically means you can set your network to flag “events” that occur in the cameras’ field of vision. This could be anything from motion detection to missing objects to tampering with the camera itself. Instead of poring over hours of footage, your network can tell you exactly when these events occurred and point you right to them.
• Flexibility and Scalability: In a traditional analog DVR set-up, each camera must be connected directly to the DVR. IP cameras can circumvent this through the use of switches, which allow cameras in close proximity to each other to be connected to a single switch, which then runs a single wire to the NVR (Network Video Recorder—we will discuss this next week). This reduces the number of cabling runs, which makes it ultimately less labor-intensive, and also allows you to connect more cameras because you’re no longer limited by the number of ports on your DVR. On top of that, using a PoE (Power over Ethernet) switch allows your Cat 5e or Cat 6 cable to run the signal AND provide power to your camera, eliminating the need for a separate power supply.

Wait, What’s PoE?

Edgar Allen Poe was a 19th century writer generally known for his macabre short stories – just kidding, that’s obviously not the right Poe. The PoE we’re concerned with is an acronym for “Power over Ethernet” and refers to a system that passes electrical power along with data on an Ethernet cable. As we mentioned, this bundles power and data together and removes the necessity of a separate power source, which just adds more cables. A POE switch also allows you to rig more cameras together to the same NVR. These switches can provide several ports for connecting cameras, and then those PoEs in turn can be connected to a single NVR in a “tree” style configuration, provided your switch is able to handle the power and network traffic. A similar amount of cameras would require additional DVRs in an analog set-up, and that means more cables, and more work.