Representations - Going Audiovisual

This unit introduces students to the binary digits that lie beneath the images and sounds of the digital media that is all around them.  

Just like in the previous unit, where students examined characters and numbers, the ideas that students need to understand are not really new to them. You will draw on familiar examples of composing images out of individual elements, mixing elementary colours to produce new ones, and taking samples of analogue signals to illustrate these ideas and bring them together in a coherent narrative.

The unit also has a significant practical aspect using editing software for both images and sound (detailed worksheets are included for GIMP and Audacity).  Students  manipulate images and sounds to gain an understanding of the underlying principles of digital representation.  

The unit resources include a useful learning graph (.jpg file) to show how the unit content is sequenced - see this link https://blog.teachcomputing.org/approaches-to-developing-progression  for an explanation.

This unit builds on the Year 8 unit, ‘Representations: from clay to silicon’.

 

 

Resources

Representations - Going Audiovisual Overview

This resource provides a unit overview for the Year 9 ‘Representations - Going audiovisual' unit of work. It gives a clear overview of objectives to be covered within each session and a learning graph to show the range of skills being developed...

Lesson 1 - Binary Mosaic

Digital pictures are formed out of individual pixels (picture elements), just like the Greek and Roman mosaics are formed out of individual pieces of glass or stone. However, unlike their ancient counterparts, the elements in digital mosaics are aligned in rows and columns, with the colour of each element...

Lesson 2 - A Splash Of Colour

In the early days of personal computers, graphics were displayed in a range of different resolutions and colour depths, depending on the hardware available. Nowadays, while resolution is still being increased, there is no mention of colour depth or the number of possible colours available. We have used 24 or 32...

Lesson 3 - Collage

After introducing students to the ideas behind digital image representation, it’s now time for a hands-on approach. In this lesson, students will use appropriate software to perform a range of image manipulation functions and complete specific...

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