Analog Security Camera
Analog security cameras may be somewhat overshadowed by the more technologically advanced IP cameras of today, but there is still a strong market for them because they offer a very cost-effective method of video surveillance. If you find yourself torn between an analog and IP security system, then here are the key aspects of analog security cameras worth considering.
What is an Analog Security Camera?
Analog security cameras produce analog output (coax cable) but nowadays they send information to a Digital Video Recorder (DVR), which converts and records the captured data in digital format. Analog differs from digital cameras (IP cameras) in that analog cameras require the DVR to process the footage, but IP cameras process the video footage before sending it to the NVR.
Many people in the surveillance industry expected analog CCTV to die out when the high megapixel resolution of IP cameras gained popularity. But this was never the case, as many people found the more difficult installation and higher prices didn’t justify a better resolution.
Traditional analog cameras aren’t capable of providing the high resolutions that IP cameras create. In fact analog cameras measure resolution in a different way entirely. Standard analog cameras measure resolution by TV lines (TVL). Most analog cameras have a TVL range of 420 to 700. 220 TVL is considered the lowest range, with 600 and over providing the sharpest resolution. Once the camera captures the image, it is then sent through a coax cable to the DVR. At the DVR the images are converted from their analog signal into a digital format, which can be more easily stored and distributed.
Modern analog cameras are capable of providing 720p HD footage. These cameras still use the standard coax cabling and DVRs, allowing you to introduce them into your existing analog system (you will need an HD DVR).
Previously only newer IP cameras were capable of high definition (HD). Now HD analog cameras are available and are an ideal choice for individuals who would benefit from HD quality video but may not require the more advanced features of IP cameras that drive their prices up.
Advantages of Analog Security Cameras
- Analog cameras are a cheaper alternative to IP cameras, making them a great option if you have a lower budget.
- Their footage can also be uploaded to the Internet through the DVR.
- If you require a low number of security cameras then analog is often a wise choice.
Disadvantages of Analog Security Cameras
- A lot of cabling may be required if many cameras are used.
- It isn’t possible to leverage on an existing IT network infrastructure like digital cameras connect to NVRs.
- Analog cameras struggle with long distance applications.