OCR GCSE Computer Science · J277
Paper 1
Revise: Types of CompressionLossy compression permanently removes some data to reduce file size. It is suitable for images, audio and video when some reduction in quality is acceptable.
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GCSE Computer Science · key term
A method of reducing file size by permanently removing some of the original data. The exact original data cannot be recovered from the compressed file.
Used by OCR
Paper 1
Revise: Types of CompressionLossy compression permanently removes some data to reduce file size. It is suitable for images, audio and video when some reduction in quality is acceptable.
Lossy compression does not necessarily produce an obvious change in appearance or sound, but some original data is still permanently lost.
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