BAUD
\bˈɔːd], \bˈɔːd], \b_ˈɔː_d]\
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By Princeton University
By DataStellar Co., Ltd
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/bawd/ (plural "baud") The unit inwhich the information carrying capacity or "signalling rate"of a communication channel is measured. One baud is onesymbol (state-transition or level-transition) per second.This coincides with bits per second only for two-levelmodulation with no framing or stop bits.A symbol is a unique state of the communication channel,distinguishable by the receiver from all other possiblestates. For example, it may be one of two voltage levels on awire for a direct digital connection or it might be the phaseor frequency of a carrier.The term "baud" was originally a unit of telegraph signallingspeed, set at one Morse code dot per second. Or, moregenerally, the reciprocal of the duration of the shortestsignalling element. It was proposed at the InternationalTelegraph Conference of 1927, and named after J.M.E. Baudot(1845-1903), the French engineer who constructed the firstsuccessful teleprinter.The UK PSTN will support a maximum rate of 600 baud but eachbaud may carry between 1 and 16 bits depending on the coding(e.g. QAM).Where data is transmitted as packets, e.g. characters, theactual "data rate" of a channel isR D / Pwhere R is the "raw" rate in bits per second, D is the numberof data bits in a packet and P is the total number of bits ina packet (including packet overhead).The term "baud" causes much confusion and is usually bestavoided. Use "bits per second" (bps), "bytes per second" or"characters per second" (cps) if that's what you mean.
By Denis Howe
Word of the day
basidiomycota
- comprises fungi bearing the spores on basidium: Gasteromycetes (puffballs); Tiliomycetes (comprising orders Ustilaginales (smuts) and Uredinales (rusts)); Hymenomycetes (mushrooms; toadstools; agarics; bracket fungi); in some classification systems considered a division of kingdom comprises fungi bearing spores on a basidium; includes Gasteromycetes (puffballs) Tiliomycetes comprising the orders Ustilaginales (smuts) and Uredinales (rusts) Hymenomycetes (mushrooms, toadstools, agarics bracket fungi).