Difference between bit rate and baud rate?

Difference between bit rate and baud rate.

The differences between bit rate and baud rate:

- Bit rate is measured as number of data bits transmitted / second in communication channel.
- Baud rate is measured as number of times a signal state is changed in a communication channel.

One change of state can transmit one bit or less than one bit which depends on modulation technique used. The bit and baud rate have the connection:
bps = baud / second x the number of bits / per baud