Aliasing

Sampling and Aliasing

ECE 5660 Spring 2006 Utah State University Sampling and Aliasing 0 0.5 1 1.5 2 2.5 3-1-0.5 0 0.5 1 time (seconds) amplitude You can zoom in and use the time axis to measure the period of the sinusoid.

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Anti-Aliasing Filter, Group Delay and Phase Match

4633 Old Ironsides Drive, Suite 304, Santa Clara, CA 95054 Copyright © 2009 Crystal Instruments. All rights reserved . Page 1 Anti-Aliasing Filter, Group Delay and Phase Match James Zhuge, Ph.D. Anti-Aliasing Filter and the Use of Sigma-Delta Converters The anti-aliasing filter is an important ...

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A Directionally Adaptive Edge Anti-Aliasing Filter

A Directionally Adaptive Edge Anti-Aliasing Filter Konstantine Iourcha JasonC. Yang y Advanced Micro Devices, Inc. Andrew Pomianowsk i z Figure1: Steps of the Directionally Adaptive Edge Anti-Aliasing Filter algorithm.

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The basics of anti-aliasing: using switched-capacitor filters ...

Maxim > App Notes > Amplifier and comparator circuits Filter circuits (analog) Keywords: Anti-aliasing, switch capacitor, A/D, Analog to Digital, A to D Apr 12, 2005 APPLICATION NOTE 3494 The basics of anti-aliasing: using switched-capacitor filters Abstract: Aliasing due to unwanted, spurious ...

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Experimental investigation of aliasing in the assessment of ...

header for SPIE use Experimental investigation of aliasing in the assessment of sampled images Joseph van der Gracht *a, Gary W. Euliss **b and Victor Paul Pauca ***c a HoloSpex, Inc.; b Applied Photonics, Inc., c Duke University ABSTRACT Many visible and infrared sampled imaging systems suffer ...

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A Test for Aliasing Using Bispectral Analysis

A Test for Aliasing Using Bispectral Analysis MELVIN J. HlNlCH and MURRAY A. WOLINSKY* Aliasing is a signal-confounding problem that arises when a continuous-time signal is sampled at a rate slower than twice the highest frequency component of a Fourier series representation of the signal.

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Sampling and Aliasing: An Interactive and On-Line Virtual ...

Sampling and Aliasing: An Interactive and On-Line Virtual Experiment ("What we 'see' is not what it is!")

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CT filtration aliasing artifacts - Medical Imaging, IEEE ...

IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. IO, NO. I, MARCH 1991 Correspondence CT Filtration Aliasing Artifacts Carl R. Crawford Abstract-In a continuous implementation of filtered backprojection for computerized tomography (CT), projections are filtered prior to hackprojection.

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frequency domain explanation using Fourier Transforms

Aliasing comes in several forms: SPATIAL ALIASING, IN PICTURES moire patterns arise in image warping & texture mapping jaggie s arise in rendering TEMPORAL ALIASING, IN AUDIO when resampling an audio signal at a lower sampling frequency, e.g. 50KHz (50,000 samples per second) to 10KHz TEMPORAL ...

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Random Decimation in Anti-Aliasing

Random Decimation in Anti-Aliasing By: Zsolt Papay Tech University of Budapest (TUB) Dept of Telecommunication Budapest, Hungary Purpose: To present a "one-button" experiment for exploring a technique, used in all of the AGILENT 546xx series oscilloscopes, which is remarkably effective against ...

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