What is CCTV? CCTV camera system includes what?

Not only you but also people who have worked in the field of camera for a long time have heard a lot about CCTV related terms such as CCTV camera, CCTV system . So do you know what CCTV stands for? Or is CCTV Camera? The following article will answer the above questions for you.

CCTV concept and CCTV Camera

1. CCTV is an acronym for Closed Circuit Televison, translated into Vietnamese as CCTV. This is a separate video system, personal or private, as you wish and it must be closed. Those are 2 very important factors.
2. A CCTV system is a system that transmits video data to a monitor so that those who can access the system can view it. In other words, this is the CCTV system or surveillance camera.
3. CCTV camera also means surveillance camera or CCTV. Whether it is CCTV or CCTV Camera, it refers to surveillance camera systems made to monitor activities where users need to observe. This system needs a camera eye, power cord, cable, jack, storage device to create an analog camera system, or a complete ip camera system.

CCTV camera also means surveillance camera or CCTV.

What is the CCTV system special?

1. CCTV system provides true video images in real time.
2. Can store for users to review what happened before.
3. This helps users can use that data to meet many different things such as security investigations, theft investigations, .

What does CCTV include?

To work, the entire camera will have to include: 1 or more camera eyes, wires, signal wires. network cable, Jack BNC, recorder, hard drive, . connected together.

What types of CCTV are there?

In terms of movement

For the motion of the camera we divide the CCTV (CCTV) into two categories: Static Camera and Dynamic Camera.

1. Static cameras are fixed cameras, not capable of rotating themselves, only used to observe a fixed position.
2. Dynamic camera has the ability to rotate or rotate when there is a controller used to view a large, extensive area.

Dynamic camera is a camera capable of self-scanning, it is also known as PTZ (Pan Pit Zoom) camera translated into Vietnamese as the Camera with the ability to rotate, tilt and zoom. This type of camera is of high quality and the price is also very high

In terms of integrated technology

The camera has built-in infrared to help you see at night in low light conditions called infrared camera. The camera does not support night vision infrared lights called normal cameras.

The camera can also recognize faces, detect motion, alert burglar, this is called a smart camera. Currently on the market, most cameras are integrated with these smart features.

In terms of signal

1. Analog Camera: is the type of camera that transmits video image data on a coaxial cable and takes it to the data recorder, then sends the image on the screen.
2. IP Camera : A type of camera that uses the Internet to transmit image signals, in which the IP Wifi line is without coaxial cables and does not need to use hard drives and recorders.

In terms of shape

1. Body camera: The most common type of camera, the camera with a tripod, long body.
2. Camera Dome: Usually a circular camera, held up to observe.
3. Desktop camera: It is not a body, not a dome, it is on a table called a desktop camera.

In terms of use

In terms of use, most cameras have the same meaning as a CCTV such as: CCTV, security camera, surveillance camera, network surveillance camera, mobile phone surveillance, anti-theft camera, burglar alarm camera, .

The principle of operation of CCTV system

CFA - a color filter (a set of optical filters that form a color signal) provides analog to digital converter (AFE), and the formed digital signal is transmitted directly to the chip. Through the chip and amplifier the video signals are generated.

Image signals from CCD-> AFE-> Nextchip-> Amplify -> Video out

V-Driver is responsible for brightness and horizontal scan formation of CCD.

IRIS drive controls the lens to synchronize the external signal.

RS485 microprocessor control control such as IR lighting control, replacement control for OSD control keys, .

1. Flash memory contains chip driver software, which can be accessed via the control keys to replace a number of settings.
2. I / O chip Interface input and output as interface with the console output control signals led signals
   motion alarm.
3. A modern processor has a lot of functions, here are some key features:
4. BLC - exposure compensation, "BLC" is a function that allows the camera to obtain high quality images even when the camera is directed to a light source or in the context of brightly lit areas. The impact of this function leads to the inversion of the most prominent parts of the frame. Dark images will appear.
5. The WDR function (the image will be proportional to the brightness and darkness) allows you to organize both the light and shadow areas with the best quality. The microprocessor will quickly divide into two parts, including the dark and light areas of a scene. Each component is treated individually (the dark part becomes light remains the same or slightly reduced in clarity), then the two parts are combined in the frame. It turns out high quality images with a dark area and light handling. In addition to brightness and automatically adjusts image contrast.
6. DNR (Digital Noise Reduction): Reduces color noise in low light environments.
7. AGC: Video automatically rises to the standard.
8. SENS-UP: Allows viewing at very low light.
9. Day / Night mode: Ban mode for black and white only and combination with IR illumination from an external sensor.
10. Ability to localize areas in videos. From 4 to 12 depending on the chip. Motion detection + adjusts sensitivity and position in frame motion detection.
11. DIS (Digital Image Stabilization): digital image stabilization system.