1.2 text, sound and images Flashcards

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1
Q

how does a computer represent text

A

text converted to binary to be processed by computer

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2
Q

unicode vs ASCII

A
  • unicode allow greater range of characters and symbols
  • unicode require more bits per character
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3
Q

how does computer represent sound

A

sound wave sampled (convert analogue wave into digital signal). processed by computer

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4
Q

what is sample rate and resolution in sound file, what effect does increase have

A

sample rate: number of samples taken a second

sample resolution: number of bits per sample

increase file size and accuracy of recording

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5
Q

what is an image

A

series of pixels that are converted to binary, which is processed by a computer

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6
Q

what is resolution and colour depth in image, how does increase affect

A

resolution: number of pixels in image
colour depth: number of bits used to represent each colour

file size and image quality increase

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7
Q

]

A
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