aliasing

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14:58 Nov 24, 2009
English to Norwegian 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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Summary of translations provided
4aliasing
Bjørnar Magnussen


  

Translations offered


3 days 20 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
aliasing


Definition from snl:
aliasing – telekommunikasjon, det at et tidskontinuerlig signal samples med for lav samplingsrate (se sampling) slik at signalet ikke entydig kan føres tilbake til sin tidskontinuerlige form. Årsaken er at forskjellige frekvenskomponenter kan gi samme samplede signal. Aliasing unngås ved at samplingraten er minst dobbelt så høy som frekvensen for den høyeste spektralkomponenten i signalet. I standard PCM-systemer for telefoni begrenses talesignalet oppad til 3400 Hz, og det samples 8000 ganger per sekund.

Example sentence(s):
  • Når vi undersampler, kan aliasing oppstå. Ved aliasing rekonstuerer man ”feil signal”. - uio  
Bjørnar Magnussen
Local time: 17:51
Native speaker of: Native in NorwegianNorwegian
PRO pts in category: 42
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