AC9TDI8K03
Years 7 to 8
Technologies
AC9TDI8K03 | Years 7 to 8 Digital Technologies: Data representation
Content Descriptor
Content descriptor investigate how digital systems represent text, image and audio data using integers
Strand
Knowledge and understanding
Substrand
Data representation
This content descriptor sets out learning for Years 7 to 8 Digital Technologies. Use it to plan lessons and assessment with the Australian Curriculum v9.
Elaborations
- • Elaboration explaining how digital systems represent text as a sequence of individual characters numbered using the Unicode character set, for example upper-case and lower-case letters, punctuation and emoji
- • Elaboration explaining how digital systems represent audio using whole numbers for the amplitude of the soundwave at a given sampling rate, for example -32,768 to 32,767 for 16-bit audio at 44,100 Hz
- • Elaboration explaining how digital systems represent bitmap images (for example PNG and JPEG) as the colour of each pixel in separate red, green and blue (RGB) channels ranging from 0 to 255, and represent Scalable Vector graphics (SVG) using the geometry of lines and shapes
- • Elaboration investigating how a digital system converts audio data to integers as it records, stores and outputs sound, for example using the Welcome to Country app to understand the local history and Traditional Owners of the lands which students learn on to inform the programming of an Acknowledgement of Country in a local First Nations Australian language
Plan a lesson from this content description.
Start freeAchievement standard statements this supports
- Students acquire, interpret and model data with spreadsheets and represent data with integers and binary.See it on the standard page →
- They acquire, interpret and model with spreadsheets and represent data with integers and binary.See it on the standard page →
Read the full Years 7 to 8 Digital Technologies achievement standard
Read the full Years 7 to 8 Technologies (all subjects) achievement standard