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BTC304 1 What is DSP?
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  • 1. BTC304: Digital Signal & Image Data Processing Lecture 1: What is DSP? Martin Uren
  • 2. DSP Lectures  What is DSP?  ADC & DAC  FIR & IIR Filters  Interpolation  Motion Estimation  Comb Filtering  Oversampling  Sub-band Filters  Revision 2
  • 3. What is DSP?  Definitions:  “Changing or analysing information that is measured as discrete sequences of numbers” (www.bores.com/courses/intro/index.htm)  “The manipulation of digital signals in order to extract useful information from them” (Real-Time Digital Signal Processing, Nasser Kehtarnavaz, Newnes, 2005, ISBN 0750678305)  “The process of taking a signal and performing an algorithm on that signal to analyze, modify, or better identify that signal” (Getting Started with DSP, Dennis Kertis, Texas Instruments) 3
  • 4. DSP Concept Analogue World 4 www.drawingcoach.com
  • 5. DSP Concept ADC Analogue World 5 www.drawingcoach.com
  • 6. DSP Concept ADC DAC Analogue World 6 www.drawingcoach.com
  • 7. DSP Concept ADC DSP DAC Analogue World 7 www.drawingcoach.com
  • 8. DSP Concept  Signals come from the real world ADC & DAC - next lecture Real-time processing - only have the time between samples for processing Signals are discrete - information between discrete samples is lost Mathematical operations - typically multiplying & adding 8
  • 9. DSP Advantages Versatile Repeatable Simple 9
  • 10. DSP Applications  List some general applications of DSP 10
  • 11. DSP Applications  List some general applications of DSP  Filtering  Spectrum Analysis  Synthesis  Data Compression  Error Processing 11
  • 12. DSP Broadcast Applications  List some applications in the area of broadcast technology 12
  • 13. DSP Broadcast Applications  List some applications in the area of broadcast technology  MPEG coders & decoders  SFX  Audio mixing  Telecoms  Gigabit Ethernet 13
  • 14. BTC304: Digital Signal & Image Data Processing Next Lecture: ADC & DAC Martin Uren