Data Representation 0.0 / 5 ? ComputingRepresenting dataGCSEOCR Created by: PollyMunroCreated on: 27-03-19 14:48 Binary A base-2 counting system made of 1s and 0s 1 of 18 Denery A base-10 number system 2 of 18 Hexadecimal A base-16 number system using numbers 0-9 and letters A-F 3 of 18 Check Digit A digit added to a string of digits which is used to check if all the digits have been entered and read correctly 4 of 18 Character Set A group of characters that a computer recognises from their binary representation 5 of 18 ASCII A 7-bit character set consisting of 128 characters 6 of 18 Unicode A large character set that attempts to include all possible characters that may be written 7 of 18 Pixel Small dots that make up a bitmap image 8 of 18 Metadata Extra data stored in a file which gives information about the file’s properties 9 of 18 Colour Depth The number of bits used for each pixel in an image file 10 of 18 Resolution The density of pixels in an image, often measured in dpi 11 of 18 Sampling The process of converting analogue signals to digital data 12 of 18 Sampling Intervals The time between each sample 13 of 18 Sample Size The total number of bits available for each audio sample 14 of 18 Bit Rate The number of bits used per second of sampled audio 15 of 18 Sampling Frequency The number of audio samples that are taken per second 16 of 18 Lossy Compression Permanently removing data from a file to decrease the file size 17 of 18 Lossless Compression Temporarily removing data from a file to decrease the file size 18 of 18
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