parity bit


Also found in: Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to parity bit: checksum

parity bit

n. Computers
A bit added to a binary code that indicates parity and is used to check the integrity of data.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.parity bit - (computer science) a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's; e.g., if the parity is odd then any group of bits that arrives with an even number of 1's must contain an error
computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures
bit - a unit of measurement of information (from binary + digit); the amount of information in a system having two equiprobable states; "there are 8 bits in a byte"
References in periodicals archive ?
At the point of double error detection of the extended Hamming Decipher, an even parity of syndrome parity bit serves as the indicator for the entire encoded bits.
Then we use the data bit extrinsic information [L.sup.i.sup.e2,k] of decoder 2 and the parity bit extrinsic information [L.sup.p.sup.e1,k] or [L.sup.p.sup.e2,k] to calculate the desired information of [s.sub.k] which is soft decision detected (44) and final output detection of data dk which is hard decision detected (45) using the foll owing equation,
Parity bit checking was widely used for its simplicity and ease of implementation, but is by no means a foolproof means of error detection.
The puncturing process yields two bits, a systematic bit and a parity bit, at every time instant.
The idea is to map the encoded bits of a standard turbo code after puncturing some of the parity bits to obtain a desired spectral efficiency to a high order modulation constellation.
These parity bits are used as a method of detecting errors.
When the 8th bit of a byte is not used to encode a symbol, it may be used as a parity bit for error detection purposes.
Nine chips (8 for the 8 bits and 1 for the parity bit) are needed for each 64K or 256K of RAM.
This can be achieved by using gated power ML technique and parity bit respectively.
Considering bandwidth challenge of data transmission, especially, video transmission over PON, FEC scheme should make full use of each parity bit and this is the key problem we have to address in this paper.