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baud    音标拼音: [b'ɔd]
波特

波特

Baud
鲍


baud
波特 BD

baud
鲍

baud
n 1: (computer science) a data transmission rate (bits/second)
for modems [synonym: {baud}, {baud rate}]

baud \baud\ (b[add]d or b[^o]d), n. [Named after J. M. E.
Baudot, a French inventor, died 1903.] (Computers,
telecommunications)
A unit of transmission speed for information conveyed over a
digital communications channel, usually taken as equal to the
number of bits of information transmitted per second. The
speed in bauds indicates the number of signalling events per
second; however, since it is necessary in most cases to
transmit control information along with the data, the {data
signalling rate} may be smaller than the baud rate.
[PJC]

/bawd/ (plural "baud") The unit in
which the information carrying capacity or "{signalling rate}"
of a communication channel is measured. One baud is one
symbol (state-transition or level-transition) per second.
This coincides with bits per second only for two-level
{modulation} with no {framing} or {stop bits}.

A symbol is a unique state of the communication channel,
distinguishable by the receiver from all other possible
states. For example, it may be one of two voltage levels on a
wire for a direct digital connection or it might be the phase
or frequency of a carrier.

The term "baud" was originally a unit of telegraph signalling
speed, set at one {Morse code} dot per second. Or, more
generally, the reciprocal of the duration of the shortest
signalling element. It was proposed at the International
Telegraph Conference of 1927, and named after {J.M.E. Baudot}
(1845-1903), the French engineer who constructed the first
successful teleprinter.

The UK {PSTN} will support a maximum rate of 600 baud but each
baud may carry between 1 and 16 bits depending on the coding
(e.g. {QAM}).

Where data is transmitted as {packets}, e.g. characters, the
actual "data rate" of a channel is

R D / P

where R is the "raw" rate in bits per second, D is the number
of data bits in a packet and P is the total number of bits in
a packet (including packet overhead).

The term "baud" causes much confusion and is usually best
avoided. Use "bits per second" (bps), "bytes per second" or
"characters per second" (cps) if that's what you mean.

(1998-02-14)


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  • What is the difference between baud rate and bit rate?
    Bit Rate [Baud Rate * Signal Unit]: 4000 bps (bits per second) Bit rate and Baud rate, these two terms are often used in data communication Bit rate is simply the number of bits (i e , 0’s and 1’s) transmitted per unit time While Baud rate is the number of signal units transmitted per unit time that is needed to represent those bits
  • Baud rate vs. Bit rate - Electrical Engineering Stack Exchange
    A minor point: by definition, a Baud (named after Emile Baudot) is one symbol per second So your statement, baud 115200 means 115200 bits per second only if each baud = 1 bit If each baud is 5 bits, then having baud 115200 means a bit rate of 115200 * 5 bits per seconds is correct in spirit, but you should replace the word "baud" with "symbol"
  • What standard UART rates are there?
    However these are actually bits per second (bps), not baud -- see below 110 baud was used by 8-level Teletypes like the ASR-33 I'm not aware where 150 Baud was used, but it is a doubling of 75 baud, commonly used (along with 60 baud) for 5-level TTYs 300 bps was the standard for the first widely-used telephone modems in the 1960's
  • signal processing - Difference between bit rate and baud rate . . .
    Baud rate is the number of symbols per second Bit rate is the number of the information bits per second To see the difference, consider a transmission line capable of having 4 different states, say 0 , 1 , 2 and 3V
  • Difference between bit rate and baud rate and its origins?
    Baud rate refers to the number of "slots" per second With most forms of serial communication the data in each slot is a one or a zero But one could, eg, transmit a voltage indicating a value between zero and three, for four (vs two) possible values per slot
  • microcontroller - How do you determine which baud rate to choose, its . . .
    Baud rates near the MCU frequency are rarely usable, so putting a divisor up front allows for a wider selection of baud rates using the same 8-bit or 16-bit divisor c) The UART hardware itself needs some clock cycles to process each bit (this includes having three separate clock cycles when using the 3X sampling mode)
  • can bus - how to calculate the CAN bus baud rate from the Tq and clock . . .
    first , I think I know how to calculate the CAN bus Baud rate form the parameter in picture blew ,this is a CAN FD config clock frequency ：80000 k pre-scaler ：1 so we can get the Tq = 1 80000 K BTL cycles : 40 time for a bit = 40 * (1 80000K) = 1 2000k So we can get the baud rate = 1 (1 2000k) = **2000k ** this Baud rate which we
  • communication - How were standard serial port baud rates chosen . . .
    \$\begingroup\$ There are no standard that defines what serial port baud rates must be There are only baud rates that are commonly used so that is what devices commonly offer Some specific standard intefaces like DMX512 or MIDI do define the baud rate, but you really don't think it as serial port but a specific interface \$\endgroup\$ –
  • A COM Port on a Windows PC indicates the bit rate, or the Baud rate?
    A phone line has a high frequency limit of about 3300 Hz If that was the cutoff, your modem couldn't send more than 2400 baud (bit rate) By shifting the signal within one cycle, it's able to transmit more than 1 bit in 1 baud Add 4 shifts and you up the bit rate from 2400 to 9600 At least that's what I remember from some 20 years ago
  • baudrate - How are two definitions of baud rate same? - Electrical . . .
    The bit rate VS baud rate has been a confusing topic for me lately I feel like I am clear about the difference between these two But going through the definitions of baud rate, I find two different definitions in use: A baud rate is the number of times a signal in a communications channel changes state or varies





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