aliasing

a·li·as·ing

noun

Visible or audible distortion introduced into digital information, such as images or audio signals, caused when a continuous line or transition is not smoothly captured or represented because of the low resolution or sampling rate of a digital medium.
The appearance of jagged distortions in curves and diagonal lines in computer graphics.

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Jagged distortions in curves and diagonal lines in computer graphics caused by limited or diminished screen resolution.
Compare antialiasing
Distortion in a reproduced sound wave caused by a low sampling rate during the recording of the sound signal as digital information.

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Verb

Present participle of alias.

Noun

(plural aliasings)

(signal processing, graphics, sound recording) Distortion caused by a low sampling rate, as Moire effect or stair-stepped edges.

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aliasing - Computer Definition

A phenomenon that occurs when different analog continuous signals overlap and become indistinguishable. If the sampling of the analog waveform is too infrequent (less than half the highest frequency present), the digitally encoded signal cannot reliably be decoded faithfully. Rather, it can be reconstructed as an alias of the true signal. Aliasing is a major concern in the digital encoding of analog audio and video signals. Aliasing in video signals results in artifacts in video images that can manifest as jagged blockings or a tiling effect. See also analog, digital, encoding, PCM, and waveform.

Webster's New World Telecom Dictionary Copyright © 2010 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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(1) See alias.

(2) In computer graphics, aliasing is the stair-stepped appearance of diagonal lines when there are not enough pixels in the image or on screen to represent them realistically. Also called "stair-stepping" and "jaggies." See anti-aliasing.

Low and High Resolutions

A low-resolution image showing the stair-stepping is on the left. The higher-resolution version is on the right.

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aliasing

aliasing - Computer Definition

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WORDS NEAR aliasing IN THE DICTIONARY

aliasing

aliasing - Computer Definition

Also Mentioned In

WORDS NEAR aliasing IN THE DICTIONARY

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