ACTDIK024

Investigate how digital systems represent text, image and audio 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 (Skills: Literacy, Information and Communication Technology (ICT) Capability, Critical and Creative Thinking)
• recognising that Unicode attempts to represent the written symbols of every language; and using Unicode charts to look up characters from Asian writing systems (Skills: Literacy, Information and Communication Technology (ICT) Capability, Critical and Creative Thinking, Intercultural Understanding)
• investigating the different representation of bitmap and vector graphics and its consequences, for example pixelation in magnified bitmap and vector images (Skills: Literacy, Information and Communication Technology (ICT) Capability, Critical and Creative Thinking)
• investigating how colours are represented in images and videos, for example manipulating red, green and blue (RGB) colours in an image editor (Skills: Literacy, Information and Communication Technology (ICT) Capability, Critical and Creative Thinking)
• 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 (Skills: Numeracy, Information and Communication Technology (ICT) Capability, Critical and Creative Thinking)
• explaining ways media elements are presented, for example the difference between embedded and linked media elements (Skills: Literacy, Information and Communication Technology (ICT) Capability, Critical and Creative Thinking)

(View this topic on www.australiancurriculum.edu.au )