Data Representation

Binary

Denary

Hexadecimal

Convert from Binary to Denary

Convert from Denary to Binary

Convert from Hexadecimal to Binary

Convert from Binary to Hexadecimal

Convert from Denary to Hexadecimal

Convert from Hexadecimal to Denary

Why do computers use binary?

Why do programmers use Hexadecimal?

ASCII

Unicode

Estimate the size of a text file

Raster (bitmap) graphics

Pixel

Resolution

Colour Depth

Metadata in Image Files

Estimate the size of an image file (uncompressed)

Lossy Compression

Lossless Compression

Storing Sound as binary

Sample Rate

Sample interval

Bit Rate

Bit Depth

Digital to Analogue Converter (DAC)

Analogue to Digital Converter (ADC)

Compression

Audio Metadata

Estimating the file size of audio files (uncompressed)