KwickClips Computer Systems · 43 sec · free
What does RLE store for each run?
Short answer. A count and a value.
Does lossless compression lose data?
No, the exact file comes back.
Run length encoding
| Data | RLE |
|---|---|
| WWWWWWBBB | 6W 3B |
| AAAAAAAA | 8A |
Remember
| Lossless: exact copy back |
| RLE: count and value |
Can a file shrink and lose nothing? Yes. Use run length encoding. It stores each run as a count and a value. Six W and three B. Eight A. Remember. Lossless gives the exact file back. RLE stores count and value.
This clip is from the full lesson: Data Compression: Lossy and Lossless — 5 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Cambridge IGCSE Grade 9 Computer Science (0478), Cambridge IGCSE Grade 10 Computer Science (0478), Edexcel GCSE GCSE Computer Science (1CP2)
More KwickClips from this lesson
What does compression do to a file?39 sec
Can lossy removed data be brought back?42 sec
Can you use lossy compression for an app?42 secVoice-over is AI-generated; the script is written and checked by Kajal Ma'am. Confirm anything you plan around against your official board document. We never ask for a password or an OTP.