Digital_Information - Digital Representation of Information...

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Digital Representation of Information HAdm 174 - Microcomputing
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Lecture Roadmap Using Computers/Security Digital Representation of Information Database Hardware Software Networks Internet / Web
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Encoding with Symbols A B C D E F
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Encoding with Symbols A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 Using 6 symbols, in combinations of 2, we can represent 36 characters (6 2 ) First Component Second Component
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Encoding with Symbols 1 0 0 1 1 0 1 0 M 1 1 0 0 0 0 1 0 a 1 1 1 0 0 1 0 0 r 1 1 0 1 0 1 1 0 k M A R K Using 6 Symbols (combinations of 2) Using 2 Symbols (combinations of 8)
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Encoding with Symbols How many different combinations are possible with 3 die? 3 die @ 6 sides each 6 3 = 6 x 6 x 6 = 216
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Data Representation TRUE FALSE 1 0
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What is a Bit? 0 One bit is the smallest element of computer memory… …it is a tiny electrical switch that can be turned on or off.
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What is a Bit? 1 One bit is the smallest element of computer memory… …it is a tiny electrical switch that can be turned on or off.
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Stringing Bits Together 0 1 0 0 0 1 1 0 1 1 1 bit = 2 bits =
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Stringing Bits Together 3 bits = 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 2 3 = 8
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8 Bits = 1 Byte 2 8 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 256
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Bits and Capacity 0 10 20 30 40 50 60 70 1 2 3 4 5 6 # of Bits Capacity Demo: Bits and Capacity
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Numeric Representation 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 1 0 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 0 1 2 3 4 5 6 7 8 9 10 11 255
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Comparing Data Types Represented as a numeric: (1 byte) 200 1 0 0 1 0 0 0 1 Are there other ways that something that “looks” like 200 could be represented digitally? As it turns out, yes; there are several different ways.
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Symbol Representation 8-Bit Code = 2 8 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 256 characters ASCII Symbol A B C D E F G H I J K 1 0 0 0 0 0 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 1 0 0 0 1 0 0 1 0 0 0 1 0 1 1 0 0 0 1 1 0 1 0 0 0 1 1 1 1 0 0 1 0 0 0 1 0 0 1 0 0 1 1 0 0 1 0 1 0 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 Link: ASCII Table
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Symbol Representation
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