There are different types of CCTV cameras. In general CCTV is a camera that can produce images or recordings for surveillance purposes in public places, such as in supermarkets, schools, factories, warehouses and so on. Due to reliable image processing performance, CCTV cameras can also be used in banks and transport systems that require high definition images. The inventor of the CCTV camera is Marie Van Brittan Brown. A CCTV camera can produce images or recordings for various needs such as surveillance and security of a location. CCTV Jakarta cameras can be either a video camera, or a digital camera. Video cameras work by sending analog or digital signals to storage media such as video tape recorders or computer hard drives.
CCTV Jakarta analog
Types of analogue CCTV cameras can directly record analog signals as images to video tape recorders. If an analog signal is recorded on a tape recorder, then the recording must be run at a very slow speed to operate continuously. In order for a single three-hour recording tape to run for 24 hours it is usually set at about four frames per second. Analog signals can also be converted into digital signals to allow recordings to be stored on a computer hard drive. For that type of analog CCTV cameras must be installed directly to the video capture card on the computer that will convert the analog signal to digital. This card has a relatively cheap price but the resulting digital signal is generally in the form of MPEG compression so that video recordings can be stored continuously.
Another way to store CCTV recordings is on non-analog media ie using a digital video recorder (DVR – Digital Video Recorder). Special DVRs for the use of CCTV cameras generally require relatively easy maintenance with simple settings. Some types of DVRs also allow digital broadcasting of video signals to function like network cameras. If the device can broadcast video but not record it then it is called video server. An effective video server to create a video signal from a cctv analog camera into a network TV.
Digital CCTV Jakarta
CCTV Digital cameras do not require video capture cards because they work using digital signals that can be stored directly to a computer hard drive. Storing uncompressed digital recordings will take up a large amount of hard drive space in your computer. This type of multi-megapixel digital CCTV camera can capture video images at resolutions up to 11 Megapixels. In contrast to analog cameras, high-resolution image quality can be obtained with the latest CCTV camera types. Due to a much higher resolution then it can be used on a large area which usually requires some analog camera.
Network CCTV Jakarta
In a network CCTV camera there is a network adapter, power supply, CPU, encoder and image sensor. Types of network CCTV cameras (IP cameras) can be analog or digital video cameras that have IP addresses capable of broadcasting video and even audio. Network cameras do not require analog signal output so the resolution is higher than ordinary analog camera CCTV. Analog CCTV cameras generally produce videos with PAL resolution of 768 × 576 pixels or NTSC 720 × 480 pixels. While the network camera has a VGA resolution of 640 × 480 pixels, SVGA 800 × 600 pixels or quad-VGA 1280 × 960 pixels. An analog or digital camera connected to a video server can function as a network camera. But for the size of the resulting image will depend on the lens and image sensor on the type of CCTV camera. Types of network CCTV cameras or IP cameras can be used as cheap surveillance solutions. Network CCTV requires only one network camera, multiple Ethernet cables and one computer. But the installation of a complete digital CCTV Camera requires network cameras, DVRs, and computers equipped with special software and CCTV monitors.