Binary coding schemes

1. The alphabetic data, alphanumeric data, numeric data, symbols, sound data and video data, are
represented as combination of bits in the computer.
2. The bits are grouped in a fixed size, such as 8 bits, 6 bits or 4 bits. A code is made by combining bits of definite size.
3. Binary coding scheme are representing the data such as alphabets , digit 0-9, and symbols in a standard code.
4. A combinations of a bits are represent a unique symbols in a data.
5. The standard code enables any programmer use the same combination of bits to represent a symbol in the data.

These most commonly used schemes are :-
1. EBCDIC ( Extended Binary Coded Decimal Interchange code).
2. ASCII ( American Standard Code for Information Interchange).
3. Unicode.

Extended Binary Coded Decimal Interchange code


1. EBCDIC uses 8 bits ( 4 bits for zone , 4 bits for digit ) to represent a symbol in the data.
2. EBCDIC allows 2^8= 256 combinations of bits.
3. 256 unique symbols are represented using EBCDIC code. It represents a decimal no. ( 0-9), small alphabets ( a-z), capital alphabets ( A-Z), special characters and control characters ( printable and non-printable).

American Standard Code for Information Interchange