Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as banks, stores, and other areas where security is needed.

Types Of CCTV Cameras:

  • Bullet Type Cameras are designed for capturing images in a fixed area. These cameras are recognized by their thin and cylindrical design. There are also classifications of Ultra Bullet distinguished by their smaller size and cheaper price.
  • Dome Cameras, named after the shape of their housing is designed for in-store installations. It works in two ways as it is unobtrusive but visible, thus, it warns people that the area is protected by a CCTV network and gives comfort to its clients for its security.
  • Discreet Cameras are cameras in disguise, they could look like a fan or any other thing that would not seem suspicious in the area.

  • Infrared Cameras are designed for evening lookouts. It captures images with the help of its infrared lighting surrounding its lens.
  • Varifocal Cameras are designed to allow zooming in and out without losing focus on the image.
  • Network Cameras allow transmission of images through the internet or a local LAN with controlled bandwidth.
  • Wireless cameras are cameras that may or may not be connected to the internet. These cameras use signalling devices to transmit images from camera to viewing area.
  • PTZ Cameras or pan-tilt-zoom are cameras that can be moved. There are variations of these cameras that are programmable and are manually controllable. This allows viewers to have more freedom and control of viewing things.

Side by side comparison: IP camera and HD over Analog:

Camera Resolution

HD over analog has both 1.3 megapixels (720p) and 2 megapixels (1080p) resolutions. These are the lowest HD resolutions available, but for most businesses and for most people, these are enough for great quality videos and photos from their security camera.

On the other hand, IP camera systems go beyond 1080 pixels. Also, there are now IP cameras that have 12 or more megapixels. More than this, compared to an HD over an analogue camera with the same resolution, an IP camera often has crisper images and much truer colours.

Frame Rates

Be sure to get a camera that allows you to record videos at 30 frames per second. This is the fps value that gives you real-time recording. There are no problems with HD over analogue cameras that record at 30 fps, but you must pay close attention to cameras with more than 2 megapixels as they might have fewer fps.


HD over analogue makes use of traditional RG59 cables that enable it to transmit videos up to 1,600 feet without loss of quality. Meanwhile, IP cameras use Cat5e or Cat6 network cable and run for only 328 feet.

Power Supply

HD over analogue needs a separate power supply or distribution box. With IP cameras, on the other hand, you have the option to use Power over Ethernet, where power is supplied from the same network cable that it uses to transmit surveillance photos and videos. Otherwise, it would need its own power supply as well.


Generally, HDCVI cameras cost less than an IP camera. Even with the more affordable IP cameras coming out all the time, these are still more expensive than a comparable IP camera. What’s more, the HDCVI DVRs are generally cheaper than IP camera NVRS.

But take into consideration that cables for an IP camera system are generally cheaper than cables used for HDCVI systems.