Analogue and digital data
- Analogue: a continuous representation of data. Between any two points of data are infinitely more values.
- Digital: a discrete representation of data. Information is separated into separate elements and between two values are no other values.
The advantages of digital data: simplicity of storage, complex operations, not affected by component aging or temperatures, lossless transport, possibility to encrypt or compress.
Transistors can only store two values: 0 or 1, this is the source of binary code. These values are called binary digits: BITs
The advantages of binary data: technical simplicity makes it easier and cheaper to create fast processors and memory. A distorted or corrupted binary signal can also be restored through the use of margins and criterium values: any value close to 0 becomes 0; a value close to 1 becomes 1. If a is value entirely between the two, this will generate an error. This is called a silly bit.