nner reads the light and dark areas of an image and converts the light into a coded signal. scanning The process of analyzing the brightness and colors of an image, using a camera or other collection device, Glossary of Terms according to a predetermined pattern. In monitors, the number of scanning lines per frame gives an indication of the quality of the picture transmitted and displayed. Super CIF. A standard video exchange format made up of a square of four CIF images. SCIF specifies 576 lines, each of which contains 704 pixels. Also known as 4CIF. screen Devices that emit or reflect light to a viewer. Examples include the silver sheets of beaded vinyl upon which motion pictures or slides are projected, conventional CRTs, LCD displays, and conventional televisions. See Session Description Protocol. SECAM Sequential Couleur Avec Memoire. The color television system that offers 625 scan lines and 25 interlaced frames per second. It was developed after NTSC and PAL and is used in France, the former Soviet Union, the former Eastern bloc countries and parts of the Middle East. Two versions of SECAM exist: horizontal SECAM and vertical SECAM. In this system, frequency modulation is used to encode the chrominance signal. Security policy An information security policy as an explicit set of prescribed practices that fosters protection of the enterprise network and of information assets. security video Video systems that are used to observe the events in a distant location, nearly always in a receive-only arrangement. Many such systems are slow-scan and use inexpensive cameras to capture images. The video signal. Typically not digitized or compressed. serial communication Used to connect computers with modems, printers and networks. Networks based on serial communication typically use the EIA's RS-232-C interface in which the pins that carry the electrical signal are arranged in a pattern that is understood by both the sending and receiving device. serial interface Refers to data being transferred between a computer and