Data Representation - Intro to Data Communication

Text, Image, Audio, and Video can all be used to represent data. All data sent across the transmission media is entirely in binary format (0s and 1s).

1. Text - 

If a text contains a number (1, 2, 3, 4,...), it is transformed to binary format using Decimal-to-binary conversion.

If the text contains an English alphabet (a, b, c,...) or an English word (table, chair, if, else,...), it is translated into decimal form numbers using the ASCII format. The ASCII is an abbreviation for the American Standard Code for Information Interchange.

2. Image -

If an image is the data, then we can also convert t into a binary format. Image is a collection of Pixels (Picture Element). 

For simplicity, we take a normal image of Red, Blue, and Green color. Also, we take three bits of Red, Blue, Green in which the range goes from 0 to 1. 

000 - White

001 - Green

010 - Blue

100 - Red

111 - Black 

So, the image formed is 

                              

Note - for simplicity, we did not take 110, 101, 011

3. Audio/Video - 

Audio and Video are a continuous quantity. It is not discrete. That's why we can change it into an analog signal or digital signal. In a digital signal, we write 0s and 1s.