Year 10 - Computing
The need for compression
Data compression
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will be introduced to the concept of data compression and why it is needed. The will compare lossy and lossless compression methods and their typical uses. They will have the opportunity to compression methods such as run length encoding (RLE) and Huffman coding.
Lesson Summary
You will learn to describe why data compression is used and explain its advantages.
Key Notes
- Compression reduces file sizes, making storage and transmission more efficient.
- Compressed files load faster on websites and take less time to send or receive.
- Commonly compressed files include images, videos, audio, and documents.
Vocabulary To Learn
- compression: the process of reducing file size
- bandwidth: the maximum amount of data that can be transferred over a communication channel
- latency: the time delay between a signal being sent and a signal being received
Common Mistakes To Avoid
- Compression is only useful for pictures or photos.
3 Quick Questions (With Answers)
1. Describe the system or process from this lesson in clear steps.
Compression reduces file sizes, making storage and transmission more efficient. Compressed files load faster on websites and take less time to send or receive.
2. Define this computing term and give one practical example. 'compression'
the process of reducing file size. Add one real device or system example to prove understanding.
3. Correct this common computing misconception.
Mistake: Compression is only useful for pictures or photos. Correction: Compression applies to many types of files such as MP3 for audio, MP4 for video, ZIP for grouped files.
More Lessons In This Unit
Browse all guides in the Year 10 Computing guide library.