Found 4 hits - Term: baud, Database: *, Strategy: exact
- [1] : The Collaborative International Dictionary of English v.0.48
baud \baud\ baddd or b^od, 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
see also:
data signalling rate
- [2] : WordNet (r) 2.0
baud
n : computer science a data transmission rate bits/second
for modems syn: baud rate
see also:
baud rate
- [3] : Jargon File (4.3.1, 29 Jun 2001)
baud /bawd/ n. simplified from its technical meaning n. bits per
second. hence kilobaud or kbaud, thousands of bits per second. the
technical meaning is `level transitions per second'; this coincides with
bps only for two-level modulation with no framing or stop bits. most
hackers are aware of these nuances but blithely ignore them.
historical note: `baud' was originally a unit of telegraph signalling
speed, set at one pulse per second. it was proposed at the november,
1926 conference of the comite' consultatif international des
communications te'le'graphiques as an improvement on the then standard
practice of referring to line speeds in terms of words per minute, and
named for jean maurice emile baudot 1845-1903, a french engineer who
did a lot of pioneering work in early teleprinters.
- [4] : The Free On-line Dictionary of Computing (27 SEP 03)
baud
/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
see also:
signalling rate modulation framing stop bits morse code j.m.e. baudot
pstn qam packets
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