Baudot code, invented by Émile Baudot in the 1870s, was an early form of character encoding used for telegraphy. It was the predecessor of the widely used teletype code, International Telegraph Alphabet No. 2 (ITA2), which was later replaced by ASCII. Baudot code used five bits to represent each character of the alphabet, transmitted over a communication channel like a telegraph line or radio signal by asynchronous serial communication.
The code was originally designed with groups of five “on” and “off” signals of equal length, which was more efficient than the Morse system. This made it easier to transmit messages and resulted in a saving of time and resources. Each group of five signals represented a single character and offered 32 possible combinations. However, modern versions of the Baudot code feature groups of seven or eight signals instead of five.
Émilie Baudot invented the original 5-bit code called International Telegraph Alphabet No. 1 (ITA1) in 1870. The code was later improved by Donald Murray in 1901 to minimize wear and tear on machines. Murray assigned the frequently used symbols and letters to codes with fewer punched holes, resulting in the newer version, International Telegraph Alphabet No. 2 (ITA2). ITA2 was widely used until ASCII codes became popular in 1963 due to their system being simpler and faster.
What is the Baudot Code used for?
Baudot code was used for telegraphy communication in the past. Nowadays, it is considered to be a historical invention since more efficient ways of communication like ASCII codes have replaced it.
What is an International Telegraph Alphabet?
International Telegraph Alphabet was a term used for telegraph signals that consisted of dots and dashes for communication. Baudot code was invented to make this system more efficient.
Who invented Baudot Code and when?
Baudot code was invented by Émile Baudot in the 1870s.
The Bottom Line
Baudot code was an early system of character encoding for telegraphy invented by Émile Baudot that used groups of five signals to represent each character of the alphabet. Donald Murray later improved upon the code to minimize wear and tear on machines. Although it is considered a historical invention today, it played an important role in the evolution of communication systems.