Digital Technologies / Levels 7 and 8 / Data and Information
Content description
Investigate how digital systems represent text, image and sound data in binary
Elaborations
explaining that characters in text correspond to numbers defined by the character set, for example ‘A’ corresponds to 65 in the ASCII and Unicode character sets
recognising that Unicode attempts to represent the written symbols of every language; and using Unicode charts to look up characters from Asian writing systems
investigating the different representation of bitmap and vector graphics and its consequences, for example pixelation in magnified bitmap and vector images
investigating how colours are represented in images and videos, for example manipulating red, green and blue (RGB) colours in an image editor
converting between decimal and 8-bit (1 byte) unsigned binary, covering whole numbers typically used for characters and RGB, for example 65 in decimal is 01000001 in 8-bit binary
explaining ways media elements are presented, for example the difference between embedded and linked media elements
