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aliasing

Swedish translation: Vikningseffekt

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:aliasing
Swedish translation:Vikningseffekt

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18:54 Dec 26, 2008
English to Swedish translations [PRO]
Tech/Engineering - Telecom(munications)
Additional field(s): Electronics / Elect Eng
English term or phrase: aliasing
Definition from ATIS Telecom Glossary 2007:
In any technology or process involving (a) sampling a signal, e.g., an electrical signal or (a series of images of) a moving subject; (b) processing, storing, or transmitting representations of the samples; and (c) replicating the original signal from the representations: the production of artifacts as a result of sampling at intervals too great to permit faithful replication of the original signal.

Example sentence(s):
  • Digital alias-free signal processing (DASP) is a technique for overcoming the problems of aliasing at extended frequency ranges. Based on non-uniform or randomised sampling techniques and the development of novel algorithms, it creates the capacity to suppress potential aliasing crucial for high frequency applications and to reduce the complexity of designs. Wiley
  • An example of aliasing can be seen in old movies, especially when watching wagon wheels on old Western films. Recall that occasionally the wheels appeared as if they going in reverse, even as the wagon would speed up. This phenomenon occurs as the rate of the wagon wheel's spokes spinning approaches the rate of the sampler (the camera operating at about 30 frames per second). National Instruments
  • The term aliasing refers to the distortion that occurs when a continuous time signal has frequencies larger than half of the sampling rate. The process of aliasing describes the phenomenon in which components of the signal at high frequencies are mistaken for components at lower frequencies. Sampling and Aliasing
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Vikningseffekt
Definition:
Störning vid digital ljud- eller bildbehandling. Uppstår när samplingsfrekvensen är för låg i förhållande till signalens högsta frekvens. (Se Nyquists lag.) De högsta frekvenserna återges då som låga frekvenser när signalen återskapas. (Frekvensen "viks ner".) I bildbehandling kan vikning märkas som moiréeffekter eller som den klassiska effekten i filmer när vagnshjul tycks rulla baklänges. I ljud märks vikning som brus eller andra störande ljud. - Blockighet i digitala bilder och tecken (trappstegsformade konturer) är en form av vikning.
Selected response from:

Maria Dellqvist (née Ahlfors) (X)
Sweden
Grading comment
4 KudoZ points were awarded for this answer



Summary of translations provided
5 +2Vikningseffekt
Maria Dellqvist (née Ahlfors) (X)


  

Translations offered


7 days   confidence: Answerer confidence 5/5 peer agreement (net): +2
Vikningseffekt


Definition from Computer Sweden:
Störning vid digital ljud- eller bildbehandling. Uppstår när samplingsfrekvensen är för låg i förhållande till signalens högsta frekvens. (Se Nyquists lag.) De högsta frekvenserna återges då som låga frekvenser när signalen återskapas. (Frekvensen "viks ner".) I bildbehandling kan vikning märkas som moiréeffekter eller som den klassiska effekten i filmer när vagnshjul tycks rulla baklänges. I ljud märks vikning som brus eller andra störande ljud. - Blockighet i digitala bilder och tecken (trappstegsformade konturer) är en form av vikning.

Example sentence(s):
  • Av olika anledningar är det vanligt att signalbehandling/filtrering av tidskontinuerliga signaler utförs genom att filtrera (eller kanske bara studera frekvensegenskaperna för) en samplad version av den tidskontinuerliga signalen. I den här uppgiftsomgången skall ni studera vikningseffekter vid sampling samt frekvensegenskaper för några olika typer av tidsdiskreta filter. - Linköpings Universitet  
  • Distorsionseffekt som uppkommer när samplingsfrekvensen är för lågt satt, varvid blandning sker med den analoga signalen. Kallas även överlappning eller aliasing. - Sveriges Radio  
Maria Dellqvist (née Ahlfors) (X)
Sweden
Local time: 17:41
Native speaker of: Swedish
PRO pts in category: 4

Votes in favor of/against selecting this as the best translation of the term asked
Yes  Jonas Frizell
4 days
  -> Tack Jonas!
Yes  Henrik Brameus
79 days
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