Overview
This lecture covers the fundamentals of data representation and data transmission, and guides students to create a short, creative video explaining these concepts.
Data Representation
- Data representation is how computers store and use information like numbers, text, and images using binary code (0s and 1s).
- Binary numbers form the basic language of computers.
- Digital images are represented by pixels, while digital audio uses sampling to convert sound into data.
Data Transmission
- Data transmission involves sending information between devices using wired or wireless communication.
- Serial transmission sends bits one after another along a single wire, suitable for long distances.
- Parallel transmission sends multiple bits simultaneously on separate wires, which is faster but may have timing issues.
- Three data transmission modes: simplex (one direction only), half-duplex (two-way, one at a time), and full-duplex (two-way, simultaneously).
Creative Video Tips
- Use analogies, such as comparing binary to a light switch (on/off).
- Visual aids like animations or drawings help illustrate concepts.
- Roleplay or props (e.g., flashcards with 0s and 1s) make explanations engaging.
- Add text overlays or background music to enhance clarity and interest.
Activity Instructions
- Research data representation and transmission concepts.
- Write a concise script following the provided outline.
- Plan scenes with a storyboard.
- Record and edit a 1-minute video, using creative elements.
- Submit the finished video for assessment.
Marking Scheme Overview
- Content accuracy (8 marks): Clear explanation of concepts.
- Clarity and conciseness (4 marks): Information is brief and well-presented.
- Creativity and engagement (4 marks): Use of creative methods.
- Presentation skills (2 marks): Clear speech and delivery.
- Technical quality (2 marks): Good video and audio.
Key Terms & Definitions
- Data Representation — How computers store and use information using binary (0s and 1s).
- Binary — The computer's language using only two digits, 0 and 1.
- Serial Transmission — Bits sent one after another along a single wire.
- Parallel Transmission — Multiple bits sent at the same time on separate wires.
- Simplex — Data transmission in one direction only.
- Half-Duplex — Data transmission in both directions, but not at the same time.
- Full-Duplex — Data transmission in both directions at the same time.
Action Items / Next Steps
- Research data representation and transmission.
- Write a script and storyboard for your 1-minute video.
- Film, edit, and submit your video for assessment.