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lecture8 - Lecture Outline (Week 4, lecture 2) Digitizing...

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Lecture Outline (Week 4, lecture 2) Digitizing Analog Signals Reading: Text 1 section 1.3.1. Supplementary text2 section 2.4. Material covered: 1. To Digitize or Not to Digitize When did the digital revolution begin? From analog computing to digital computing (Pascal/Babbage/Turing). From analog communication to digital communication (Nyquist/Shannon) From analog media to digital media (CD, DVD, HDTV, digital camera) Why digitize? Information are often digital to start with (e.g. text, data) Digital information can be reproduced (transmitted or stored) distortion free. They are not subject to progressive degradation each time they are transmitted or stored. Digital information is much easier and cheaper to process with integrated circuits. Digital signal processing allows extraction of relevant information in an analog signal, leading to significant reduction in volume of data, i.e. saved bandwidth and storage. DSP enhances our cognitive understanding of data.
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lecture8 - Lecture Outline (Week 4, lecture 2) Digitizing...

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