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单词 parity bit
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parity bit
parity bit n. Computing a bit which is added to a set of binary values in order to act as a check, and is made to be 1 or 0 so as to make the total number of 1s in the set even or (less commonly) odd.
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parity digit1954
parity bit1955
parity1966
1955 Math. Tables & Other Aids Computation 9 134 The words are often divided into: one parity bit, 24 significant digits, sign of exponent, five-bit exponent, and sign of number.
1975 J. Finkel Computer-aided Experimentation xvii. 373 The parity bit is computed by the memory write hardware before storing a word. When a word is fetched from storage the parity bit is recomputed, and if it does not agree with the parity bit appended to the word an interrupt is issued.
1999 J. Naughton Brief Hist. Future (2001) vi. 102 The transmitter can add a special bit (called a parity bit) at the end of each group of digits, depending on whether the group has an even or an odd number of ones in it.
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