CCTV Cameras

“Invasion of privacy” may come to mind when CCTV cameras are mentioned. Well, here is another angle to it. You can monitor your own CCTV security system or let a security company do it for you. In case of a perimeter invasion or burglary at your home, the police can easily identify the perpetrators and bring them to justice. CCTV cameras may also be able to provide substantial proof to the authorities and assist them in recovering stolen property.

Here are some relevant statistics for you:

  • With 2000 CCTV cameras already operational, the city government of Chicago has installed an additional 250 CCTV cameras.

  • The National Centre for Education Statistics estimated that sixty four percent of public schools use CCTV cameras to monitor schools as a security and safety measure.

You may see CCTV cameras on public buildings or landmarks, but did you know that you can use them for your own personal security as well. Mentioned below are some of the types of CCTV cameras available in the market, 

Types of Closed Circuit Television (CCTV) Cameras

CCTV cameras can be rotary or fixed and are broadly categorized into two types;

  • Analogue CCTV cameras

    An analogue CCTV camera records directly to a video tape recorder. In order to run continuously, the recording tape runs at a very slow speed. The tape normally operates at four frames per second.

  • Digital CCTV cameras

    Unlike analogue, digital CCTV cameras do not need a video capture card to operate. These cameras make use of a digital signal which is directly saved to a computer. This digital signal is a compressed 5:1. Furthermore, DVD quality of this signal can be achieved if it is compressed even further.

An important point to note here is that it is actually the Digital Video Recorder DVR that stores the video. The new compression industry standard is H.264 Compression DVR. It stores three times longer videos as compared to the previous models.

Components of a CCTV Security System

CCTV security system consists of different components. These include:

  • CCTV Camera – Used for video surveillance and acts as the input device to the system

  • CCTV MonitorThis device receives signals and reproduces pictures or videos captured by the CCTV camera

  • Main Power Supply – The primary electrical supply unit

  • Backup Power Supply – Backup power supply comes in handy in case of a power outage

  • Coaxial cables – These cables are used to connect several CCTV cameras to one video recorder, video switcher or CCTV monitor. You only need these cables if you want to install more than one

  • Video Recorder – Transforms and records signals sent by a CCTV camera in the form of a video

  • Video Switcher – Switches the video mode between different CCTV cameras

How to Install CCTV Camera:

Installing a CCTV camera at home or at your place of business just won’t cut it. You need to take care of a few other things.

  1. Find the right location for your cameras. Identify your assets and choke points (entry & exits)

  2. Get help the first time around. There is no harm in DIYing, however if you haven’t done this before, it’s better to get some professional help.
  3. Select the right equipment. Get help if you are confused. A professional can help you decide if you really need ‘motion detecting with object masking’ or you are just wasting your money.

  4. Your Digital Video Recorder DVR is your black box. Keep it in a safe place.

  5. You can also view your CCTV feed on your laptop. Provided you have High Speed Internet.

In the end make sure you check your CCTV feed frequently. This will keep you informed and will help sleep well at night.



Q:How cctv cameras can assist when there is fire?

A:CCTV cameras can detect smoke and prevent fires, when they are included in a smoke detection system. CCTV smoke detection system is based on sophisticated computer analysis of the video image. The system makes use of advanced image processing technology and detection processes to identify characteristics of smoke patterns. Some CCTV smoke detection systems are so accurate that they can also differentiate between steam and smoke.

Q:What is better for a CCTV surveillance system? Analog or Digital?

A:Although, it depends on individual preference of the user, a digital camera in CCTV surveillance system seems to have an edge over the analog one. Digital cameras have the capability to produce better quality images and they work better in larger networks. Some major benefits of using digital cameras include wide range networking, two-way audio communication, no separate power cable, and recording and storage capability.

Q:How can I transmit cctv cameras video wirelessly?

A:If you wish to transfer your CCTV camera video wirelessly, you would need a wireless security camera system, as it is designed to transfer videos wirelessly. In addition, WIFI bridge cameras can also help you transmit videos by using video servers that connect to a central digital video recorder or network video recorder.

Q:How do CCTV cameras work technically?

A:There are different types of CCTV cameras and they vary in terms of their operation. However, the basic components of a CCTV system are the same. These components include a camera, a camera lens, and a CCTV monitor. The images collected with a camera are sent to the CCTV monitor and are videotaped by a video recorder. The lens in CCTV determines how much detail can be captured.

Q:When setting up a CCTV surveillance system and connecting power supply which is positive wire?

A:The general convention for connecting power supply in CCTV surveillance camera is that the red wire is a positive wire, while the black one is for the ground. If you are not sure about the correct wire, you can use a multi-meter for wiring. Most low voltage electronics do not get damaged by reverse voltage, so if you connect the wires and camera doesn't work, you can always often reverse the wires.

Q:Can we use a fiber optics cable for a CCTV camera network?

A:Yes, you can make use of a fiber optics cable for your CCTV camera network. There are a number of reasons why fiber optics cable is preferred by users. Fiber optics is immune to interference and is much more secure than a wireless network. It can also be used to for long distances and has a large bandwidth capability.

Q:About buying the best cctv dvr for my new Home,any opinion?

A:There is no one-size-fits-all CCTV digital video recorder, as each home or business has different requirements. First, you would need to see how many cameras you require. You will also need to decide where to mount those cameras, indoors or outdoors, and what will be your lighting needs. After considering all such aspects, you can decide on a CCTV DVR that best suits your requirements.

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