What is CCTV and what does CCTV mean

CCTV. closed circuit television (cctv)

An image communication system. The signal is transmitted from the source point only to a specific television set that is pre-arranged to communicate with the source point. It is widely used for a large number of different types of surveillance work, education, video conferencing, etc.

CCTV is the opposite of television open circuit television broadcasting.

There are two kinds of broadcasting: wireless broadcasting and cable broadcasting, the open circuit broadcasting of television stations is equivalent to wireless broadcasting (the user obtains the TV signal from the antenna), and the closed-circuit television is equivalent to cable broadcasting (cable television mode: the television signal is transmitted from the satellite transmission terminal to the designated user through a cable). It transmits the TV signal through a wire.

CCTV generally refers to television used other than radio, such as industrial television, military television, medical television, underwater television, etc.

In its simplest form, CCTV uses a single camera to send the shooting signal to the monitor through the TV cable, or it can send the shooting signal to multiple monitors through the multi-channel distribution amplifier.

The application of CCTV is extremely wide and is expanding at an unprecedented rate, and it can be said that in all sectors of the national economy, wherever modern technology is used, CCTV is indispensable.

CCTV monitoring system (example) is an important part of the security technology prevention system, is an advanced, strong ability to prevent a comprehensive system, it can be through the remote control camera and its auxiliary equipment (lens, PTZ, etc.) directly monitor all the situation of the place, at the same time can also be linked with other security technology prevention systems such as anti-theft alarm system, so that its prevention ability is more powerful. The technical requirements of the CCTV monitoring system are mainly: the clarity of the camera, the transmission bandwidth of the system, the signal-to-noise ratio of the signal, the standard of the TV signal, the camera, etc.

CCTV is relative to open circuit TV, and the signal source (RF signal) is a closed ** circuit. The open-circuit signal is the wireless transmission of the TV signal using only microwave technology. CCTV is also known as cable television.

It is different from the general public channel, the signal in the CCTV system is only transmitted between a limited number of display terminals, and is not open to the public. CCTV is mainly used for security surveillance, industrial process surveillance, etc.

The main features of CCTV are:

1.Closed system. CCTV systems are closed systems, and signals are only transmitted between a limited number of display devices, and are not transmitted or made public, which improves the confidentiality of the system.

2.Wired or wireless transmission. CCTV can be transmitted through coaxial cable, optical fiber and other wired methods, or through Changhe wireless way, which is more flexible.

3.Directed Reception. CCTV can only be received by specific display terminals, and ordinary TV sets or other devices cannot directly receive CCTV signals.

4.Safe and stable. The CCTV system has a high level of security, is not susceptible to interference from external signals, and the signal transmission is stable and will not be easily interrupted.

5.Independent control. The CCTV system has independent image acquisition, transmission and control functions, which can be centrally controlled and managed by the system administrator.

The CCTV system is mainly composed of image acquisition equipment (camera), image transmission equipment (transmission cable), image control and processing equipment (encoder, decoder, etc.), image display equipment (monitor), etc. It is widely used in traffic monitoring, social security prevention, industrial production monitoring and other fields, and is one of the most important means of monitoring.

Corresponding to closed-circuit television, there is also an open television system, which is open to the public, and everyone can use the TV to directly receive and improve its signals, such as commercial electrical channels. Both systems have their own characteristics and should be selected according to actual needs.

Summary. Closed-circuit television (CCTV) is a system that uses a camera to capture images and transmit them to a specific monitor or recording device. This type of system is typically used for security surveillance, traffic surveillance, and other occasions where real-time monitoring is required.

Unlike public television broadcasting, CCTV signals are closed and can only be on devices connected to the system**.

Closed-circuit television (CCTV) is a system that uses a camera to capture images and transmit them to a specific monitor or recorder. This type of system is typically used for security surveillance, traffic surveillance, and other occasions where real-time monitoring is required. Unlike public television broadcasting, CCTV signals are sealed and can only be connected to the system** on the equipment.

Closed-circuit television (English: closed-circuit television, referred to as CCTV) refers to a television system that transmits in a specific area and only in a fixed circuit device. CCTV is often used in areas that require monitoring, such as public places such as Silver Spine calls, casinos, airports, military sideline bases, campuses, police stations, and convenience stores.

It can be understood as surveillance cameras.

CCTV is the opposite of television open circuit television broadcasting.

There are two kinds of broadcasting: wireless broadcasting and virtual cable broadcasting, and the open circuit broadcasting of television stations is quite famous for pure wireless broadcasting (the user obtains the TV signal from the antenna), and the closed-circuit television is equivalent to cable broadcasting (cable television mode: the television signal is transmitted from the transmission end of the satellite to the designated user through the cable). It transmits the TV signal through a wire.

The use of CCTV

In the commercial sector, CCTV systems can be used to notice other areas from one control room. For example, in some places where it is not suitable for people to monitor in person, you can install a CCTV system to continuously record or follow the instructions to monitor only certain events.

Early CCTV systems used videotapes as storage**, and in recent years, they have switched to single or multiple hard disks for storage**, saving the inconvenience of replacing videotapes and saving, and if higher recording capacity and response speed are required, disk array cards are also used to enhance video storage capabilities.

The CCTV industry has developed to a new form, which is to use digital video recorders to record a large number of videos clearly, keep them for many years, and analyze or other operations on the preserved.