Digital Media

Digital Data is a form of electronic media where data is stored in digital (as opposed to analog) form. If you look at the technical aspect then it can refer to the technical aspect of storage and transmission.


How many forms digital forms surrond us?

• computers
• mobile devices
• vide game consoles
• projectors
• television
• & radio

What number system is digital data based on?
Digital data is based on the binary number system which uses the numbers 0 or 1. Everything in the computer is that used by strings which are made up of these two numbers.


What is a bit?
A bit is a binary digit which is represented by a '0' or a '1'.


What is a byte?
A byte is a sequence of 8 bits ( enough to represent one character of alphanumeric data). These are processed as a single unit of information.


What is a sampling rate?
A sampling rate, sample rate or sampling frequency defines the number of samples per second (or per other unit) taken from a continour signal to make a discrete signal.

How does depth colour affect the appearance of if an image?
Colour depth is a term used to describe the maximum number of colours present in an image.

The chosen colour depth effects the final size of the image as well as deciding the clarity of the image. More colour means makes the image look more realistic and detailed.

As you can see from the image above you can conclude that the more colour depth present in the images the better clarity can be viewed.

A sampling rate effects video but not still media. Why?
A sampling rate only effects video because in this the "samples" are actually moving which means you have something to time for its sample rate because samples are going at a particular speed. Also you can set the samples at a particular speed because something will be moving. However in a still image there is nothing to time or set a speed at because still images dont move.