Summary: AMERICAN UNIVERSITY OF BEIRUT
FACULTY OF ENGINEERING AND ARCHITECTURE
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
EECE691C Digital Signal Processing Laboratory Week 3
Digitization of Signals Pre-lab
1 Overview and Goals
As you should have discovered by now, digital signal processing is the analysis of signals
using a digital computer. In order for that to be possible, signals should be in digital
form, i.e. a sequence of numbers. Sometimes, signals are digital in nature, such as when
temperature measurements are taken periodically. However, most often signals are
continuous (analog) and have to be digitized before processing.
This digitization usually involves 2 stages: sampling, i.e. the measurement at
discretely spaced time intervals, and quantization, i.e. the transformation of the
measurements into finite-precision numbers, such that they can be represented in
computer memory. This week, we will investigate these processes. The major highlights
are as follows:
Synthesis of sinusoidal signals, and aliasing of sinusoids.
Generation of digital music, and study of aliasing in audio.
Digital images and anti-aliasing of computer graphics.
Quantization effects in audio signals.