Glossary:

ATIS Telecom Glossary

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articulation index

A measure of the intelligibility of voice signals, expressed as a percentage of speech units that are understood by the listener when heard out of context.
Note: The articulation index is affected by noise, interference, and distortion.

articulation score (AS)

A subjective measure of the intelligibility of a voice system in terms of the percentage of words correctly understood over a channel perturbed by interference.
Note: Articulation scores have been experimentally obtained as functions of varying word content, bandwidth, audio signal-to-noise ratio and the experience of the talkers and listeners involved.

artifact

In facsimile or television, a defect or distortion of the image, introduced along the sequence from origination and image capture to final display.
Note 1: Artifacts may arise from the overload of channel capacity by excess signal bandwidth.
Note 2: In general, artifacts may result from (a) sampling effects in temporal, spatial, or frequency domains, (b) processing by the transfer… (Read More →)

artificial intelligence (AI)

The capability of a device to perform functions that are normally associated with human intelligence, such as reasoning and optimization through experience.
Note: AI is the branch of computer science that attempts to approximate the results of human reasoning by organizing and manipulating factual and heuristic knowledge. Areas of AI activity include expert systems, natural language understanding, speech recognition, vision,… (Read More →)

artificial transmission line

A four-terminal electrical network, i. e. an electrical circuit, that has the characteristic impedance, transmission time delay, phase shift, and/or other parameter(s) of a real transmission line and therefore can be used to simulate a real transmission line in one or more of these respects. Synonym [loosely] art line.

ASAP

Agile Service Assembly Process

ASC

Agile Service Creation

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