Yes Key is to add redundancy to signal Encoder adds redundancy appropriate for

Yes key is to add redundancy to signal encoder adds

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Yes: Key is to add redundancy to signal. Encoder adds redundancy appropriate for channel. Decoder exploits and then removes redundancy.
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The Meaning of Information For years, telegraph messages were “compressed” by leaving certain words out, or sending key words that stood for longer messages, since costs were determined by the number of words sent. Yet people could easily read these abbreviated messages, since they supplied these predictable words, such “a” and “the.” For Shannon, information is symbols that contain unpredictable news, like our sentence, “only infrmatn esentil to understandn mst b tranmitd.” The predictable symbols that we can leave out, which Shannon calls redundancy, are not really news.
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The Meaning of Information Another example is coin flipping. Each time we flip a coin, we can transmit which way it lands, “heads” or “tails,” by transmitting a code of “zero” or “one.” But what if the coin has two “heads” and everyone knows it? Since there is no uncertainty concerning the outcome of a flip, no message need be sent at all.
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Outline of the Course Probability and statistics Entropy, relative entropy, and mutual information Data compression Gambling Channel capacity
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Grading Policy Class attendance (x 0.1) Midterm examination (x 0.3) Final examination (x 0.6)
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THANK YOU!
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  • Fall '18
  • Phuong Hanh DU

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