Equations, Vocabs And Compression

Amount of memory allocated per sample

The number of sound samples taken per second

Number of bits needed to represent each possible colour

Number of pixels that make up an image

Image resolution (number of pixels) multiplied by the colour depth

When you compress a file using lossy compression you lose part of it - gets rid of unnecessary data - image - reduces colour depth - audio - reduces sample rate and resolution - video - both

If you compress something using lossless compression you lose nothing. It is reversible - in text you use RLE (run length encoding)

RLE is run length coding it is used to shorten/compress images and pictures using the ASCII code

Number of pixels horizontally multiplied by the number of pixels vertically

A dot or square on a screen which displays colour , it consists of 3 colours, red, blue, and green. All other colour are made from these three colours

Colour depth = file size divided by image resolution

A continuous sound

It is a discrete sound

Bits

ASCII code is all the keyboard characters represented in a computer using a 7-bit , the Unicode is the ASCII code’s extension meaning rather than only one language the Unicode can do multiple

Audio file size = sampling rate multiplied by sample resolution multiplied by the audio length