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Digital technologies / Year 7 and 8 / Digital Technologies Knowledge and Understanding
Curriculum content descriptions
Investigate how digital systems represent text, image and audio data in binary (ACTDIK024)
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
General capabilities
ScOT terms
Indices, Data encoding, Binary numeral system, Computer files