CCTV monitoring system Key technologies

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CCTV monitoring system Key technologies

As in the case of television , video surveillance systems have moved from the analog to digital TV , improving transmission quality.
Classic analogue CCTV system consists of a set of cameras and a device called a registrar . The cameras provide images in the best case , a standard PAL (768×576 pixels ) . In systems during installation, often used hybrid cable with two conductors of 0.5 mm2 and coaxial components.

Almost all registrars provide access via Ethernet and the Internet, or via a web browser and client software , pay attention to one very useful function of analog video . Analog video images can be easily converted into a signal identical to the terrestrial television signal . Video image is converted and can be connected to a home antenna so that the video will be available on any TV set on the specified channel .

IP- technology

IP-based video surveillance enjoy all the benefits of IP-based technologies . In the home, all the video transmission can occur through a local area network LAN. Some cameras IP, support PPOE ( Power over Ethernet cable) – in this case does not require a separate power cable. The integration of IP-based video surveillance is possible with other protocols .

IP- camera , encode and transmit a data stream over a network in accordance with the protocol. Many household appliances , such as televisions, can decode the data stream and display the image.

IP-TV system integration of multimedia systems , supports a VCR or other playback device . When displaying video codecs often used H.264 and MPEG- 4 , a protocol in real-time streams (RTSP).