Edexcel GCSE Computer Science 2020

2.3.2: understand the need for data compression and methods of compressing data (lossless, lossy)

Keywords:
Data
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KeywordDefinition
data compressionalgorithm that reduces the number of bits needed to store data
jpglossy compression algorithm used for images
lossless compressioncompression algorithm which can be reversed without any loss of quality or data
lossy compressioncompression algorithm which cannot be reversed without losing some of the original quality or data
mp3lossy compression algorithm used for sound
run length encodinga form of lossless compression that represents each value and the number of times it repeats in order to attempt to reduce the size of a representation of data
ziplossless compression algorithm used for any type of data
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