Basic Information About CCTV

19 Feb

Introduction to CCTV

CCTV, which stands for Closed-Circuit Television, is a video surveillance system that transmits signals over a private network rather than a public broadcast. This means that the footage captured by CCTV cameras is only accessible to authorized viewers, unlike broadcast television that anyone with a TV can tune into.

CCTV systems are commonly used for security purposes in a variety of settings, including homes, businesses, schools, and public spaces. They can be used to detect crime, monitor activity, and provide evidence in the event of an incident.

Here are the basic components of a CCTV system:

Cameras: These capture the video footage. They come in a variety of types, including:
- Bullet cameras: These are small and versatile, making them suitable for a wide range of applications.
- Dome cameras: These are vandal-resistant and offer a 360-degree view, making them ideal for high-security areas.
- PTZ cameras: These can pan, tilt, and zoom, allowing you to focus on specific areas of interest.
Recording device: This stores the video footage captured by the cameras. There are three main types of recording devices:
- Digital Video Recorders (DVRs): These use hard disk drives to store footage.
- Network Video Recorders (NVRs): These store footage on a network storage device.
- Hybrid Video Recorders (XVRs): A security device that combines the capabilities of both a Digital Video Recorder (DVR) and a Network Video Recorder (NVR). This means it can record and manage video footage from both analog and IP cameras, offering greater flexibility and scalability for your security system.
Monitor: This displays the live video feed from the cameras. You can also use a monitor to review recorded footage.
Cables: These connect the cameras, recording device, and monitor.

How CCTV Works

A CCTV system works by capturing video footage with the cameras and transmitting it to a video recorder, also known as an XVR or NVR, or a local server that records the video footage and presents it on a monitor or other connected devices, such as a mobile phone or PC.

Benefits of CCTV

There are many benefits of using a CCTV system, including:

Deter crime: The presence of CCTV cameras can deter criminals from breaking into your home or business.
Monitor activity: You can use CCTV to monitor activity in your home or business, even when you're not there.
Provide evidence: If a crime does occur, CCTV footage can provide valuable evidence to help law enforcement identify and apprehend the criminals.
Improve safety: CCTV can help to improve safety in your home or business by deterring crime and providing evidence in the event of an incident.

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Video Streams of IP Cameras

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Wide Dynamic Range

WDR technology plays a vital role in ensuring IP cameras perform effectively in real-world scenarios with diverse lighting conditions. By offering a wider dynamic range, they capture clearer and more informative images and videos, enhancing security, monitoring, and various other applications.

Video Encoding

Video encoding is the process of taking raw video data and compressing it into a smaller, manageable file while maintaining acceptable visual quality. This is crucial for efficient storage, transmission, and streaming of videos.

Night vision/IR Technology

Night vision technology in CCTV cameras, also known as Infrared (IR) technology, allows them to capture clear images and videos even in low-light conditions or complete darkness. This is crucial for security and surveillance applications when natural light might be insufficient. Night vision technology has evolved significantly since its inception, starting from early image intensifiers to more advanced thermal imaging systems.

On-Screen Display

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Hard Disk Drive

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High-Defination Multimedia Interface

HDMI stands for High-Definition Multimedia Interface. It is a digital interface that transmits uncompressed video data and compressed or uncompressed digital audio data from a source device, such as a display controller to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for analog video standards.

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IPC IR light constantly on

we must check the camera's cable connection and power source. Normally, a problem comes from the wire trying to break toward the middle but not completely broken. The RJ45 jack is rusted(due to dew and water). The PoE and the power supply may not work properly. For this, we have to change the cable or we can check by removing the camera and connecting it to a shorter wire. We can also test it by changing the switch's port and the power adapter.

Samari IT Solution Pvt. Ltd. - Uniview Authorized National Distributor in Nepal