Always another way

Computing

Images can be represented as sequences of colour samples, encoded in binary. What are these images called? (Tick 2 boxes)

Sounds can be represented as sequences of sound samples, encoded in binary. What are these sounds called?

Images can be represented as collections of geometrical shapes (each with its own attributes). What are these images called?

Music can be represented as a sequence of musical notes (with information on how to play them). What is an example of this called?

What is a procedure that reduces the size of a representation called?