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About HD Cables
HD CCTV system is not yet fully developed and the following cables are useful in the field. Coaxial Cable Coaxial cable with BNC connectors, 75 ohm impedance, the same type used in analog video ...  
About SDI & SMPTE
SDI (Serial Digital Interface) is a format for transmitting video over cable, being standardized by SMPTE (Society of Motion Picture and Television Engineers). These standards are especially used fo...  
What is HDTV?
High definition television (HDTV) has much more number of lines of resolution and produces better quality image by about 2 to 5 times than standard television. Resolution is defined as number of hor...  
Image Compression Technology and the Speed
Video Image Compression Technology is the core of web cameras because the compressed video file size should be small enough to run fast through a network line of the Internet or LAN. Another main ...  
About Network Lines for CCTV Transmission
The technology in this field enables us to use the Internet or intranet line as a video transmission method. DSL and T-1 are for the Internet connection and LAN (or WAN) is for intranet. ...  
About IP Address
IP, Internet Protocol, Address works as a website address on the network. When it is assigned to a Network DVR, a Video Server, or a Web Camera, you can open it over the network. Public IP...  
What is Web Camera?
Web Camera (Web Camera Server, or Network Camera) is a CCTV Camera with built-in network video server so that you can connect it to a network line such as DSL or T-1 for the Internet or LAN. ...  
Types of Monitors
B/W Monitor and Color Monitor In the past, 9 to 12 inch (diagonal) B/W monitors were widely used in the field. These days, many people are looking for 14 inches for color monitor and 17 inche...  
About Video Switcher
Video Switcher is a combiner to combine multiple cameras and to show them on a monitor screen one by one, manually or automatically. When it works on automatic sequential mode, you can program the dwe...  
About Quad Splitter
Quad Splitter is a combiner to combine up to 4 cameras and to show them on a monitor screen split into 4 at the same time. Usually, it also has built-in switcher which can display the pictures one ...