DIGITAL SIGNAL PROCESSING

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DIGITAL SIGNAL PROCESSING

• ?.????????? ????????

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What is a Digital Signal Processing?

• Entertainments
• Digital Audio Video system such as TV, CD
  player, DVD Player etc.
• Communications
• Mobile telephone, Data optimize for
  computer networking (Data compression etc.)
• Automatically operation
• Assembly packing system, Robotics etc.

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Some Example
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DSP hierarchy
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Contents

• Introduction Complex number
  reminding
• Sinusoids signal
• Spectrum representation
• Sampling Aliasing
• FIR Filter

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Text books

• DSP First A multimedia approach
• James H. McClellan
• Fundamental of Digital Signal Processing
• Hud
• Fundamental of Digital Signal Processing
• A. Lasakul

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Files downloadhttp//www.kmitl.ac.th/dslabs
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1D 2D Signal
Amplitude
x
1D signal (Audio signal)
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1D 2D Signal
y
x
2D signal (Image signal)
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1. Introduction
x(t)
xn
1D Analog Signal
1D Digital Signal
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1.3 Thinking about system
xn
yn
x(t)
y(t)
DSP (Discrete-time system)
Output
Input
D/A Converter
A/D Converter
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Discrete-time system
DSP (Discrete-time system)
xn
Yn
hn
hn
Yn xn
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Yn xn xn
Yn
xn
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????????????????????
Yn xn ?

• ???????????????????? ? ???????????????????
  ??? yn ?????????????????????????????? ????
• ????????????????????????????????????? (Low pass,
  High pass, Band pass)
• ?????????????????? (Signal Generator)
• ????????????????? (Signal Equalization)
• ????????????????????????????????????????

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Convolutions
Yn xn ?
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Contents

• Introduction Complex number
  reminding
• Sinusoids signal
• Spectrum representation
• Sampling Aliasing
• FIR Filter

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Score

• Home work 30 ??? 40
• Test final 60 ??? 70