Unit 3 Data Representation

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  • Created by: mdampare
  • Created on: 21-11-23 12:37
Binary and Hexadecimal
Topic 1
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Which numbers are stored in one bit?
0 + 1
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How many bits are there in a nibble and a byte?
Nibble = 4 bits, byte = 8 bits
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What are the units after a kilobyte?
megabyte, gigabyte, terabyte
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What is zero as an 8 bit binary number?
0000 0000
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What is 255 in binary?
1111 1111
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What is 39 as an 8 bit binary number?
0010 0111
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Images
Topic 2
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What are some image file formats?
PNG, JPG, GIF, BMP, TIFF
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What is image resolution?
The concentration of pixels within a specific area
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Changing the colour dept of an image will...
affect the number of colours it can display
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Sound
Topic 3
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Difference between analogue and digital signals?
Analogue sound signals are continuous, digital signals are discrete
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What is sound sampling?
The number of samples taken per second, in Hertz (Hz)
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Formula for file size (bits)?
sampling rate x resolution x duration
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What is lossless compression?
Formats able to reduce file size but don't lose any information.
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What is lossy compression?
Removes sound that we can't hear easily
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Compression
Topic 4
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What is compression?
Algorithms which reduce size
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Other cards in this set

Card 2

Front

Which numbers are stored in one bit?

Back

0 + 1

Card 3

Front

How many bits are there in a nibble and a byte?

Back

Preview of the front of card 3

Card 4

Front

What are the units after a kilobyte?

Back

Preview of the front of card 4

Card 5

Front

What is zero as an 8 bit binary number?

Back

Preview of the front of card 5
View more cards

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