CCTV CAMERA
A CCTV camera, which stands for Closed-Circuit Television camera, is a video camera used for surveillance and monitoring purposes. The “closed-circuit” part of the name signifies that the video signals are transmitted to a specific, limited set of monitors and recording devices, rather than being broadcast publicly like regular television.
How Does a CCTV System Work ?
NVR VS. DVR
Components of a CCTV System
A complete CCTV system includes several essential components that work together:
- The Camera: The “eye” of the system that captures the video. There are many different types to suit various needs.
- The Lens: Determines the field of view (how wide or narrow the scene is) and how much light the camera can gather.
- The Recording Device (DVR/NVR): The “brain” of the system that stores and manages the video footage.
- Storage Drive: A hard disk drive (HDD) inside the DVR/NVR where the video is saved.
- Monitor: A screen used to view the live or recorded footage.
- Cables and Connectors: Used to transmit video signals and power to the cameras in a wired system.
- Power Supply: To provide electricity to the cameras and the recording device.
CCTV Camera Type
- Bullet Cameras: Long and visible, they are a good crime deterrent for outdoor areas.
- Dome Cameras: Discreet and protected by a dome, it’s hard to see where they are pointing.
- Turret Cameras: Easy to aim and offer clear night vision with less glare.
- PTZ Cameras: Can be remotely controlled to look around and zoom in on details.
- IP Cameras: Digital cameras that connect to a network for high-quality video and smart features.
- Wireless Cameras: Easy to set up with no video cables, but they still need a power source.
Popular & Reliable CCTV Brands in Malaysia
- Hikvision & Dahua: Offering a wide range of products from basic to professional, with strong AI features and wide support in Malaysia.
- Ezviz & Imou: The user-friendly home brands , ideal for simple wireless setups controlled by a smartphone app
- Axis Communications: A premium, expensive brand known for high quality and security, used for major commercial or government projects.
Frequently Asked Question
Which is better: a wired or wireless camera?
- Wired (usually with PoE – Power over Ethernet): More reliable and stable as they aren’t affected by Wi-Fi issues. They offer the best image quality and a single cable can provide both power and data. The installation is more complex.
- Wireless: Much easier to install as they don’t need a video cable. However, they still require a power source and a strong, stable Wi-Fi signal to work effectively. They are great for simple home setups.
What resolution do I actually need?
- 1080p (2MP): Good for general surveillance of rooms or small yards.
- 4MP or 5MP: The sweet spot for most users. It provides clear, detailed images, allowing you to zoom in on faces or license plates with better clarity.
- 4K (8MP): Excellent for covering large areas like car parks or for situations where you need to capture fine details from a distance.
Is it legal to install CCTV cameras at my business ?
Yes, it is legal. However, you must comply with the Personal Data Protection Act (PDPA) 2010 and you to place a visible sign stating that the area is under CCTV surveillance.
How many days of recording can I store?
This depends on three things: the size of your recorder’s hard drive (e.g., 1TB, 2TB), the number of cameras you have, and your recording settings (resolution and whether you record 24/7 or only on motion). A typical 4-camera system on a 1TB hard drive can store about 1-2 weeks of continuous footage.
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