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Aliasing

In digital signal processing, aliasing is a phenomenon in which a reconstructed signal from samples of the original signal contains low frequency components that are not present in the original one. This is caused when, in the original signal, there are components at frequency exceeding a certain frequency called Nyquist frequency, f s / 2 {\textstyle…

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Overview

Description

Bandlimited functions

Bandpass signals

Sampling sinusoidal functions

Historical usage

Angular aliasing

More examples

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Map overview Semantic statistics

Aliasing

Nodes74
Edges73
Triples67
Avg. degree1.97
Density0.027027
Components1

How this topic connects Entity context

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Aliasing

Top relations

related to Historical usage · 16
Aliasing → Bell Laboratories, Blackman, Dover, Historically, IF, In, John Tukey, LO, RF, Richard Hamming, Stumpf, That, The, This, Tukey, When
related to Sample frequency · 9
Aliasing → But, Most, Nyquist, Shannon, That, The, These, When, Whittaker
related to Audio example · 8
Aliasing → A4, A5, A6, Fourier, Hz, Nyquist, Six, The
related to Bandpass signals · 6
Aliasing → Filter, Nyquist, See Sampling, Some, Sometimes, Undersampling
related to Bandlimited functions · 5
Aliasing → Actual, Fourier, Functions, If, Some
is a · 4
Aliasing → major concern in the sampling of video and audio signals, moiré pattern observed in a poorly pixelized image of a brick wall, phenomenon in which a reconstructed signal from samples of the original signal contains low frequency components that are not present in the original one, special case of MSAA where pixel samples are collected over multiple frames
related to Description · 4
Aliasing → An, If, Spatial, When
related to External links · 4
Aliasing → La Vida Leica, Primer, Tektronix Application EngineerAnti-Aliasing Filter, YouTube
related to Folding · 4
Aliasing → Fig, Folding, No, The
related to Sampling sinusoidal functions · 4
Aliasing → Fourier, Sinusoids, Understanding, When

Important terminology Word statistics

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Important terminology

frequency signal sampling samples sampled reconstruction frequencies signals original components displaystyle nyquist rate called lower digital anti-aliasing sinusoids alias time

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Aliasingis aphenomenon in which a reconstructed signal from samples of the original signal contains low frequency components that are not present in the original one0.90text
Aliasingis aspecial case of MSAA where pixel samples are collected over multiple frames0.90text
Aliasingis amoiré pattern observed in a poorly pixelized image of a brick wall0.90text
Aliasingis amajor concern in the sampling of video and audio signals0.90text
posters with lenticular printinginstance ofas in 3D displays or wave field synthesis of sound.This aliasing is visible in images0.80text
Aliasingrelated to Angular aliasingSpatial0.60section
Aliasingrelated to Audio exampleThe0.60section
Aliasingrelated to Audio exampleSix0.60section
Aliasingrelated to Audio exampleHz0.60section
Aliasingrelated to Audio exampleA40.60section
Aliasingrelated to Audio exampleA50.60section
Aliasingrelated to Audio exampleA60.60section

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