1.2 Multimedia – Graphics, Sound

Understand how the data for a bitmapped image are encoded.

Use and understand the terms pixel, file header, image resolution, screen resolution and colour depth / bit depth.

Taught in: Resolution and the file header, Bitmaps: pixels and colour depth · 13 questions

Carry out calculations to estimate the file size of a bitmap image.

Taught in: Estimating bitmap file size · 6 questions

Understand how changing elements of a bitmap image affects the image quality and the file size.

Use the terms image resolution and colour depth / bit depth.

Taught in: Resolution, colour depth and quality · 6 questions

Understand how the data for a vector graphic are encoded.

Use the terms drawing object, property and drawing list.

Taught in: Vector graphics: drawing objects and the drawing list · 6 questions

Justify the choice of a bitmap image or a vector graphic for a given task.

Taught in: Bitmap or vector? Choosing for the job · 6 questions

Understand how sound is represented and encoded.

Use the terms sampling, sampling rate, sampling resolution, analogue data and digital data.

Taught in: Sampling sound: analogue to digital · 7 questions

Understand the impact of changing the sampling rate and the sampling resolution.

Including the impact on file size and on accuracy.