Data Communications and Computer Networks by Pearson

116 Data Communications and Computer Networks

Two-dimensional Parity Check

An improvement over simple parity check is 2D parity check.As the name implies, this technique

organizesanumberofbinarywordsbeingtransmittedorreceivedinsuccessionalongtwodimensions,

thatis,intheformofrowsandcolumns.Atthesender’send,theparitybitsarecomputedforeachrow

andeachcolumnusingthesimpleparitycheckmethod.Inthisway,twosetsofparitybitsaregenerated:

oneisassociatedwiththerowsofdatablock,referredtoaslongitudinal redundancy check(LRC),

andtheotherisassociatedwiththecolumnsofthe ...