This introduction covers The Travel Packing Problem within Compression for GCSE Computer Science. Revise Compression in Memory & Storage for GCSE Computer Science with 15 exam-style questions and 16 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 1 of 11 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 1 of 11
Practice
15 questions
Recall
16 flashcards
The Travel Packing Problem
You're packing for a trip. Lossless packing: You vacuum-seal clothes to remove air - they're smaller but unfold perfectly. Lossy packing: You leave your winter coat home and pack a thin jacket instead - much lighter, but not quite the same. Lossless compression is like vacuum-sealing - you can get the exact original back. Lossy compression is like leaving stuff behind - the result is good enough but some detail is permanently gone. Photos, music, videos = usually lossy (you won't notice). Documents, programs, medical scans = always lossless (need exact original)!