Memory & StorageKey Facts
Quick Reference - Images & Sound
Part of Images & Sound — GCSE Computer Science
This key facts covers Quick Reference - Images & Sound within Images & Sound for GCSE Computer Science. Revise Images & Sound in Memory & Storage for GCSE Computer Science with 18 exam-style questions and 16 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 11 of 11 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 11 of 11
Practice
18 questions
Recall
16 flashcards
Quick Reference - Images & Sound
Image Formula:
File Size (bytes) = Width × Height × Color Depth ÷ 8
Sound Formula:
File Size (bytes) = Sample Rate × Bit Depth × Duration × Channels ÷ 8
Common Values to Know:
- Image: 24-bit color depth = True Color (16.7M colors)
- Sound: CD quality = 44,100 Hz, 16-bit, stereo
- Sound: Stereo = 2 channels, Mono = 1 channel
- HD resolution: 1920×1080 pixels
Quality Trade-offs:
- Higher resolution: More pixels = better detail but larger file
- Higher color depth: More colors = better quality but larger file
- Higher sample rate: More samples = better sound but larger file
- Higher bit depth: More detail = better audio but larger file