rec1 - CS 177 Programming with Multimedia Objects...

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CS 177 Programming with Multimedia Objects Recitation
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Course Policy On Course Website
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How Computer Works
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What Computers Understand? Computers can only understand Encoding of numbers. So what is the meaning of Encoding ?
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Figure 3 (pag. 8) of the textbook The reasoning is: hardware produces (patterns of) voltages (variations of electric current). It’s enough to distinguish btw the presence of a current and its absence. 1 represents the presence of a current, o its absence. So, a bit (or binary digit) can represent the presence or the absence of the current.
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Example 1: Emoticons What if you want to tell a friend your emotion by texting them on your mobile phone (without texting a long message)? You can use emoticons… Emoticons are an encoding of emotions: :) I’m happy, I like it :( I’m unhappy, I dislike it :’( You are using a combination of symbols (parenthesis, punctuation symbols), that you normally you use in writing, to represent your emotions.
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rec1 - CS 177 Programming with Multimedia Objects...

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