What is the difference between bits per second and baud?

Question

Data transfer

A little dull.
Baud per second is the number of characters per second, bits per second, and so it is clear.
Do I understand correctly that for a frame of 8 bytes with a parity bit and 2 stop bits at 9600 baud, the bit rate will be 9600 * (1+8+1+2) = 115200?

Answer 1

"Baud per second" does not exist. Baud is already the number of bits per second, regardless of their value (data or channel control).
If one frame consists of 8 data bits, 1 parity bit and 2 stop bits, while your channel speed is 9600 baud, then to find how many bytes per second you can transfer, you do not need to multiply, but divide: 9600 / ( 8+1+2)=872,(72) bytes per second.
If, on the contrary, you need to find out the minimum baud rate of the channel (i.e. the total number of bits per second, counting the overhead bits), then in your example it is calculated as follows:
- 1000 samples in half a second is 2000 samples per second
- each sample - 2 bytes = 16 significant bits
- with a frame with 8 data bits, 1 parity bit, 2 stop bits, it turns out that two frames are needed for one sample, that is, 11 * 2 = 22 bits
- we multiply the total number of bits for transmitting one sample by the number of samples per second, we get 22*2000=44000 bits per second, that is, we need a speed of at least 44000 baud.