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Memory & StorageHigh Exam FrequencyOCR

Images & Sound

Revise Images & Sound in Memory & Storage for GCSE Computer Science with 18 exam-style questions and 16 flashcards. This is a high-frequency exam topic, so students should expect to explain it clearly under timed conditions.

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1

The Digital Camera Trick

Introduction2

Image and Sound Data Representation

Diagram3

Deep Dive: Digitizing the Analog World

Deep Dive4

Image Representation - Bitmap Graphics

Key Facts5

Image File Size Calculation

Key Facts6

Bitmap vs Vector Graphics

Key Facts7

Sound Representation - Digital Audio

Key Facts8

Sound File Size Calculation

Key Facts9

Real-World Example: Why Music Files Are Big

Deep Dive10

Exam Tips - Images & Sound

Exam Tips11

Quick Reference - Images & Sound

Key Facts

Sample Flashcards

Sample Questions

What does colour depth refer to in a digital image?

  • A. The number of pixels in the image
  • B. The number of bits used to represent each pixel's colour
  • C. The physical dimensions of the image in centimetres
  • D. The number of samples taken per second
1 markfoundation

Explain the effect of increasing colour depth on a digital image. Refer to both file size and image quality in your answer.

3 marksstandard

18

exam-style questions

16

revision flashcards

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