Glossary definition of Baud

Also known as: Bd

Baud (Bd) was the traditional unit used to measure signalling speed or modulation rate on a communications channel, and it was first used to measure the speed of telegraph transmissions.

The Baud was named after a French engineer, Jean-Maurice-Emile Baudot, and one Baud is equal to one signal change per second.

Baud is often confused with the bit rate or Bits per Second (bps), and the two terms are sometimes used interchangeably. However, Bauds and bits are not always the same thing, as more than one bit may be transferred in one Baud.

Nowadays Bits Per Second (bps) is used instead of Baud, because it is a more accurate measurement of the actual data transfer rate, and the Baud is best avoided.