Glossary:

ATIS Telecom Glossary

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chromaticity diagram

A two-dimensional Cartesian plot that depicts the multidimensional subjective relationship among colors perceived by the normal human visual system (eyes and nervous system, including the brain) when additively stimulated by (two or more; usually three) discrete monochromatic visible sources (wavelengths).
Note: The familiar CIE chromaticity diagram depicts perceived colors plotted as a function of the normalized relative intensity of a… (Read More →)

chrominance

The difference between a color and a specified reference color having a specified chromaticity and an equal luminance. [After Laurin]

chrominance signal

In color television, that signal or portion of the composite signal that bears the color information.

Chronic Trunk

Trunk: A trunk experiencing a much higher then normal rate of failure or switching irregularities, over a period of time, with resulting high incidence of test O. K. or no trouble found.

CIDR

Classless Inter-Domain Routing

CIE

Abbreviation for Commission International de l'Eclairage (International Commission on Illumination). An international standards-setting organization, based in Vienna, Austria, which is concerned with the development of (a) color-matching systems, (b) recommended practices and standards concerning the properties and applications of light, and (c) methods of measurement pertaining thereto.

CIM

Common Information Model

cinepak

A software file-compression scheme for video on low-power central processing units (CPUs), and typically operating with 320 x 240 pixels at 15 frames per second. [After Silicon]

cipher

1. Any cryptographic system in which arbitrary symbols, or groups of symbols, represent units of plain text or in which units of plain text are rearranged, or both. [INFOSEC-99]
2. The result of using a cipher.
Note: An example of a cipher is an enciphered message or text.

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