IGCSE [CS01] Data Representation

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ASCII code

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A character set for all the characters on a standard keyboard and control codes.

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Audio compression

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A method used to reduce the size of a sound file.

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Bandwidth

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The maximum rate of transfer of data across a network, measured in kilobits per second (kbps) or megabits per second (Mbps).

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Binary number system

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A number system based on 2 and can only use the values 0 and 1.

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Bit

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The basic computing element that is either 0 or 1 and is formed from the phrase Binary digit.

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Bit depth

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The number of bits used to represent the colours of a pixel.

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Bitmap image

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An image made up of pixels.

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Character set

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A list of characters that have been defined by computer hardware and software.

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Colour depth

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The number of bits used to represent the colours of a pixel.

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Compression

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The reduction of the size of a file by removing repeated or redundant pieces of data; this can be lossy or lossless.