Surveillance System or called Closed Circuit Television System functions to control all activities visually (audio visual) in certain areas installed by a device in the form of a camera. Which function can directly supervise, and observe and record events in a particular place, room or area, this tool consists of: a camera, digital video recorder, and a monitor that is integrated in a network system online or commonly also implemented manually internally . The goal of everyone using CCTV is to monitor large areas and maybe far from a location that is difficult to control and reach at the same time.
Part of the Surveillance system:
A. Camera (CCTV)
The camera functions to capture or take pictures and convert into electrical signals. installed in the areas / places to be observed. In its function the camera can be categorized according to needs and desires such as: standard, dome, pin hole. Technologically, the type of camera in its use is wireless, outdoor or indoor, and there is also a function that can be moved (pan, tilt, zoom / PTZ).
From the quality of the camera can be determined by several things such as:
Image sensor is: the part that functions to capture the image, the higher the resolution and sensitivity (illumination) the better the quality. Image sensors that are often used measure 0.25 “, 1.3”, 0.5 “and 1”. The ability to process signals on the controller such as automatic gain control, white balance, etc.
The lens functions to direct the image to the sensor image, the range and extent of the area that the image wants to take is called focus.
B. Digital Video Recorder (DVR)
CCTV technology using Digital Video Recorder is a technology that can be accessed / seen from various places that already have a good computer network and online has a high ability to access it and has been set up to make it easier for users to be able to remotely image data sent
The function of the multiplexer is to adjust the display and recording of images from the camera to a monitor and VCR.
DVR has the ability as a multiplexer and VCR, with digital computer technology now all data is changed and processed in digital form, DVR technology is now based on personal computers (PCs) with specifications in the market today.
MPEG-4 DVR SYSTEM CONFIGURATION DIAGRAM
Digital Video Recorder consists of 2 types:
• Standalone DVR
Stand alone serves as a recording device and a tool for dividing the display on the monitor layer or adjusting the display. For its advantages, when compared to a DVR Card, the usage is more practical because it does not require additional PCs, Software Installation, this system has several disadvantages that are not designed for use. as a WEB Based system, the Futures are still limited when compared to DVR Cards, and for the capacity is very limited because of the constraints of this system is the hard drive slot as data storage.
• DVR Card
As a liaison between PC and CCTV equipped with software which the software has a function as a recording device, display control device, and PTZ camera drive device, and can also function as a remote viewing system via LAN, WAN, Internet, etc. Referring to this software system can be developed for use on WEB Based.
C. Media Supporting DVR
Controller: a tool for selecting which camera to view on the monitor, or it can also set all cameras displayed on the monitor, adjust the conditions / quality of certain camera images such as brightness, recording time, frames per second, recording model.
Recorder: a tool for recording, storing data, playing back, deleting old data, backing up old data to a CD, DVD, or other hard drive. DVR Card Tools: change the analog camera data to be stored in digital media such as a computer and can be viewed by results or monitored via a computer device.
D. CCTV with Basic IP Camera
IP Based Camera is a camera that already has an IP Address so that it can function as a computer that is on a LAN network. This type of camera can stand
itself without Caed or the help of other tools to be integrated in digital computer media (HDD), this type of camera has a smaller type of storage (MPEG4). And can
accessed anywhere as long as the LAN network or the parent computer server is connected to the Internet and has a Public IP so that the existing Internet Browser can be viewed.
Availability of LAN access network, UTP / Network cable usage, availability of HUB and repeaters every 100-150M It is a requirement that must be
prepared outside the stability of the network data transfer.
, CCTV with Basic IP Camera support for 3G
CCTV with IP, is an IP Camera that has the latest technology above from the existing IP camera technology, some existing IP cameras still use the DVR Card as a liaison between the PC and CCTV, Infinity IP Cam is an overview of the IP Camera that will developing in the future. In marketing, Infinity no longer markets the DVR Card as a link to the monitor, even the software for the monitor is free when using 16 channels. This CCTV is very easy to install because it does not need to form a new network, but simply using an existing network, this CCTV is enough to use an ordinary UTP cable that is connected from the camera to the nearest Switch in the TCP / IP network.
In accordance with the class this camera is different from the others in addition to this simple camera is small and light so it does not require large, futuristic space and does not easily rust or heat. which is connected to the nearest switch, for the software to be downloaded, it can then be operated. This camera can be accessed by 20 users simultaneously.
The ease and advantage of this camera if the computer is used as monitoring is damaged, just a user replaces with a notebook on the same network, in contrast to other IP cameras that still use DVR cards and monitoring software, which if damage occurs must move the DVR Card and reinstall the monitoring software on the computer. or even have to wait for experts,
In the process of sending image data on a network to the monitor, this camera only requires very small bandwidth so that it does not cause the network to feel slow, even though there are simultaneously 5-6 cameras displayed on a monitor, this is because the process of sending images to the monitor do one at a time on a cable network so that it does not require large bandwidth.