a single element of an image on a computer screen

a binary digit, the basic unit of data within a computer system that has the value 0 or 1

a colour model used to represent and create colours by combining three colours of light: red, green and blue

the strength of a colour, shown by the value of each element (red, green or blue)

Representing images with binary data

Computing

File size of digital images

Manipulating digital images

Representing sound with binary data

Editing sound

File size and compression

In this unit, pupils will focus on digital media such as images and sounds, and discover the binary digits that lie beneath these types of media. They will explore how images and sound can be manipulated and consider the link between quality of images and sound and the resulting file size.

Data representation: images and sound

total amount of pixels an image contains based on its width and height expressed in pixels

the number of bits used to represent the colour of each pixel, which is also known as bit depth

a measure of how much binary data a file contains

changing the width and height of the image in pixels

the text description you give to the AI tool to tell it what kind of image you want it to create

a tool or effect that can be applied to an image to change its appearance

the measurement of a sound wave at a point in time

the number of samples captured per second

the number of bits used to store each sample, which determines how accurately the sample is represented

a single stream of audio used to reproduce sound

a visual representation of a sound file, showing how the amplitude of sound varies over time

produces the same sound in both left and right speakers/headphones

presents sound separately for the left and right speakers/headphones

a method where data is permanently lost during the compression process and must be approximated when the file is decompressed

a method of compression where no data is permanently lost during the process

Data representation: images and sound

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